One way scientists assess the health of our ocean’s ecosystems is to take samples of zooplankton and ichthyoplankton (fish eggs and larvae), both on the surface of the water and at depth. Observations of these plankton can inform us greatly about productivity at the bottom of the food chain, spawning location and stock size of adults, dispersal of larval fish and crabs to and away from nursery areas, and transport of ocean currents.
The Newport Hydrographic (Newport Line) is an oceanographic research survey conducted by NOAA’s Northwest Fisheries Science Center and Oregon State University scientists in the coastal waters off Newport, Oregon.
Researchers have collected physical, chemical, and biological oceanographic metrics along the Newport Line every two weeks for over 20 years. This twenty-plus year dataset helps us to understand the connections between changes in ocean-climate and ecosystem structure and function in the California Current.
Data from the Newport Line are distilled into ocean ecosystem indicators, used to characterize the habitat and survival of juvenile salmonids, and which have also shown promise for other stocks such as sablefish, rockfish, and sardine. These data also provide critical ecosystem information on emerging issues such as marine heatwaves, ocean acidification, hypoxia, and harmful algal blooms.
Newport line
Barometer of ocean acidification and hypoxia in a changing climate
Global climate models suggest future changes in coastal upwelling will lead to increased incidence of hypoxia and further exacerbate the effects of ocean acidification. The Newport Line time-series provides a baseline of biogeochemical parameters, such as Aragonite saturation state—an indicator of acidic conditions. Researchers can compare this baseline against possible future changes in the abundance of organisms (e.g., pteropods, copepods and krill) sensitive to ocean acidification and hypoxia.
Equipment used
Vertical/half meter net
Getting the vertical net in the water
Vertical net deployed vertically in the water from a research vessel
A vertical net is a ring net with a small mesh width and a long funnel shape. At the end, the net is closed off with a cylinder (cod-end) that collects the plankton. It is deployed vertically in the water from a research vessel. It is mostly used to investigate the vertical/diagonal stratification of plankton. This allows the abundance and distribution of mesozooplankton to be determined.
Bongo net
Washing the sample down the bongo net
A bongo net is drawn horizontally through the water column by a research vessel
A bongo net consists of two plankton nets mounted next to each other. These plankton nets are ring nets with a small mesh width and a long funnel shape. Both nets are enclosed by a cod-end that is used for collecting plankton. The bongo net is pulled horizontally through the water column by a research vessel. Using a bongo net, a scientist can work with two different mesh widths simultaneously.
Assisting Toby with Isaacs-Kidd net
Isaacs-Kidd midwater trawl
Isaacs-Kidd midwater trawl dimension
Isaacs-Kidd midwater trawl collects bathypelagic biological specimens larger than those taken by standard plankton nets. The trawl consists of the specifically designed net attached to a wide, V-shaped, rigid diving vane. The vane keeps the mouth of the net open and exerts a depressing force, maintaining the trawl at depth for extended periods at towing speeds up to 5 knots. The inlet opening is unobstructed by the towing cable.
What we got?
Samples from vertical netSamples from bongo net
Isaacs-Kidd sample
Krill from the Isaacs-Kidd
Personal Log
SHARK ATTACK!
That’s right, our underway CTD was attacked by a shark.
R.I.P.
On a bright and sunny day, the science team decided to launch the underway CTD, but things didn’t go as planned! Retrieving the uCTD back to the ship we saw a big dorsal fin zigzagging close to the uCTD, until we noticed that the uCTD was no longer attached to the line, therefore we had no choice that to cancel the uCTD. You should have seen all of our faces; we couldn’t believe what we saw. We think it could have been a:
White sharkSalmon shark
underway CTD (what the shark ate)
CTD stands for conductivity (salinity), temperature, and depth and it enables researchers to collect temperature and salinity profiles of the upper ocean at underway speeds, to depths of up to 500 m. Ocean explorers often use CTD measurements to detect evidence of volcanoes, hydrothermal vents, and other deep-sea features that cause changes to the physical and chemical properties of seawater.
Geographic Area of Cruise: Gulf of Alaska (Kodiak – Aleutian Islands)
Date: September 2, 2019
Weather Data from the Bridge
Latitude: 57 35.35 N Longitude: 153 57.71 W Sea wave height: 1 ft Wind Speed: 14 knots Wind Direction: 208 degrees Visibility: 8 nautical miles Air Temperature: 15.4 C Barometric Pressure: 1002.58 mBar Sky: Overcast
After a series of unfortunate events, we finally got underway! It turns out arriving several days before the ship departure ended up being very helpful. My checked bag did not arrive with me and the morning of departure it still had not arrived. I had given up on seeing it before we pulled out and gone shopping for replacement “essentials”. Then, an hour before our scheduled departure I got a call from my airline hero saying that my bag had finally made it to Kodiak. A quick trip to the airport and back to the ship and I was ready to go. That’s when the waiting game really started. Repairs to the Bongo apparatus caused a several hour delay as we waited on repairs, then after moving out into open water to test it, we found that it still wasn’t working properly. The ship crew worked to make adjustments and finally, we were off!
Science and Technology Log
We departed for the stations where the previous group had left off. The first couple of stations were methodical as everyone was becoming accustomed to what to expect. I have been asked by multiple people what kinds of things are going on during these expeditions and what the day-to-day life of a scientist is on this ship. There are several projects going on. The primary focus is on assessing the walleye pollock population, but there is also data being collected simultaneously for scientists working on other projects.
Each station starts with a bongo tow in which the bongo nets are lowered over the side and pulled along collecting plankton. Once the bongo is pulled back onto the ship, the flowmeters are read to record the amount of water that went through the net, and the nets are then carefully washed down to concentrate the plankton sample into the cod end. This end piece can then be removed and taken into the lab area to prepare the sample for shipping back to the NOAA labs. As this process is being completed, our ship’s crew is already working to bring the ship back around to complete a trawling operation in the same area.
Trawling operations off the ship’s stern. During an average trawl, the net will extend up to 540 meters behind the boat and up to 200 meters deep.
A good example of scientists and crew working together during a trolling operation. Ensign Lexee Andonian is manning the helm and watching the trawling operations on the monitor while scientist, Annette Dougherty is recording data off the monitors.
It is preferable to complete both operations from the same location since the plankton are the primary food source and a comparison can then be made between the amount of producers and consumers. Unfortunately, this is not always possible. During one of the trials yesterday, a pod of humpback whales decided they wanted to hang out just where we wanted to trawl. Because of this, it was decided to attempt to move away from the whales before starting the trawl. When all goes well, the trawling nets should bring in a nice variety of species and in our case, a large number of pollock! For the first two trials, we found mostly jellyfish with only a few other fish samples. Later trials, though, have been much more successful in finding a better mix of species. Below is a list of species caught during the last Station.
Table full of jellies
Jelly
Jelly
As the catch is spread onto the table, all other sea life is separated from the jellyfish and sorted for measurement and recorded. The jellyfish are weighed as a mixed sample, then re-sorted by species and weighed again. The fish are all measured, recorded, and bagged and frozen for future use by scientists back in the lab in Seattle that are working on special projects.
Species caught during the last Station:
Common Name
Scientific Name
Sockeye Salmon
O. nerka
Northern Smoothtongue
L. schmidti
Walleye Pollock
G. chalcogrammus
unidentified juvenile Gunnels
Pholidae family
Eulachon, or Candlefish
T. pacificus
Isopods
Shrimp
Sunrise Jellyfish
C. melanaster
Lion’s Mane Jellyfish
C. capillata
Moon Jellyfish
A. labiata
Bubble Jellyfish
Aequorea sp.
Personal Log
Drills were the word of the day the first day as we went through fire drills and abandon ship drills. It is always nice to know where to go if something goes wrong while out at sea. I now know where the lifeboats are, how to get into my immersion suit, and what to do in case of a fire on the ship.
*** Of course, just when we really start to get into the swing of things, a weather front comes through that forces us to find a place to “hide” until the waves calm down.
On another note, I have seriously been geeking out enjoying talking to the NOAA scientists about their research and experiences. There is a wealth of information in the minds of the scientists and crew on this ship. I have initially focused on getting to know the scientists I am working with and slowly branching out to get to know the crew. Hopefully I will be able to translate some of my admiration here in the coming posts.
Did You Know?
Did you know, there are approximately 1800 thunderstorm events going on in Earth’s atmosphere at any one time?
Question of the Day:
What type of fish can be found in McDonald’s Filet-O-Fish sandwich, Arby’s Classic Fish Sandwich, Long John Silver’s Baja Fish Taco, Captain D’s Seafood Kitchen, and Birds Eye’s Fish Fingers in Crispy Batter?
Evening August 16 – Due west of Barrow, Alaska within sight of the coast
Air temp 35F, sea depth 40m , surface sea water temp 41
Bring in the Bongos
Bongo Nets ready for deployment
In a previous blog I showed the Methot net that catches very small (1-5cm) fish. However, if we want to catch sea life even smaller, we bring in something called a “bongo net.” The bongo nets have very small openings–the larger nets are 500 micron (1/2 a millimeter) and the smaller nets are 150 micron. In the picture below, you will see the back tail fin of the Healy with the bongo nets suspended from the hydraulic A-frame. The A-frame supports a system of pulleys that are used to deploy and retrieve equipment (such as nets and moorings).
Organisms caught in the bongo net are washed down into this canister attached at the end.
The net looks and feels more like a tough nylon fabric, however, the water freely flows through the opening trapping the tiny organisms of the sea. These organisms are pushed into the canister at the end of the net as shown in the picture on the right. While most of them are pushed into the canisters, many are stuck on the side of the net in a sticky goop. The gelatin like goop is sprayed off the net with seawater by using a hose. The process takes just a few minutes. Since I was the net holder and stretcher I got little wet!
Copepods in a Jar
The main organisms that we caught today were copepods. They are shown in the jar appearing pink. Copepods are small crustaceans only 1-2mm in size that drift in the sea and feed on phytoplankton. Copepods are an important bottom of the food chain member of the ecosystem and serve as prey for fish, whales, and seabirds.
Flowmeter suspended at the top of a bongo net
On the front of each net there is a flow meter as shown in the picture. It looks like a little torpedo with a propeller. When the net trawls behind the ship, water flows through the net. The amount of water that passes through the net can be calculated. Using this calculation and the amount of organisms in the net, scientists can calculate the density of living microorganisms at a certain heights in the water column. With annual samples scientists will be able to determine any changes over time including changes to the overall health of the regional ecosystem. Today’s samples will also be sent out to a lab for further analysis.
Today’s Wildlife Sightings
Today I had unique experience– listening to wildlife. This was a highlight. Marine mammal acoustic scientists, Katherine Berchok and Stephanie Grassia, released an acoustic buoy this afternoon. On top of the ship they put up an antennae and listened in for whales and walrus. They were able to hear the constant underwater chatter between walruses. As I wore the headphones and listened in, I was in awe at the grumbles and the ping sounds the animals were making back and forth underwater. While we don’t know what the walrus were communicating back and forth to each other, to eavesdrop on these conversations, miles away, in real-time, was a pretty special experience.
Now and Looking forward
We did not see any ice today. I am looking forward to getting out of the fog and rain and returning back to the ice in the coming days.
Mission: Spring Ecosystem Monitoring (EcoMon) Survey (Plankton and Hydrographic Data)
Geographic Area of Cruise: Atlantic Ocean
Date: May 29, 2017
Weather Data from the Bridge:
Latitude: 41°31.8’N
Longitude: -71°18.9’W
Sky: 8/8 (Fully Cloudy, Overcast)
Wind Direction: NE
Wind Speed: 13 Knots
Barometric Pressure: 1005 Millibars
Humidity: 88%
Air Temperature: 11.5°C
Personal Log
In Port in Newport, Rhode Island (Sunday, May 28)
The 224-foot Gordon Gunter at Pier 2 at the Naval Station Newport on the morning of sailing Leg 2 of the Survey.
Greetings from NOAA Ship Gordon Gunter! On my flight into Providence, Rhode Island (the Ocean State) I was met with lengthy coastlines and beautiful blue skies. Jerry Prezioso, (one of NOAA’s oceanographers), picked me up from the airport. We made our way to the ship, Gordon Gunter, at Pier 2 at the Naval Station Newport. To get there, we drove 37 miles southeast of Providence and crossed the Jamestown Verrazzano Bridge and the Newport Bridge. Both bridges offered stunning scenes of shorelines that separated the picturesque sailboats from the majestic beach side houses. Newport, also known as City by the Sea, was a major 18th-century port city which is evident from the high number of surviving buildings from the colonial era.
NOAA Ship Gordon Gunter
Upon arrival at the pier, I passed two immense U.S. Coast Guard ships before laying eyes on what would be by new home for the next ten days—NOAA Ship Gordon Gunter. Several members of the crew were already there to welcome me aboard. The crew’s hospitality and Jerry’s tour of the ship eased my anxiety while at the same time, intensifying my excitement for the adventure that awaits.
After the tour, Jerry showed me to my stateroom. I was surprised to find out that I have my own cabin! There is a refrigerator, closet, desk, recliner, my very own sink, and a shared bathroom with the room next door. It also has a TV to watch any of the movies available on the ship.
After unpacking my luggage, I decided I would spend some time exploring the ship. I took photographs and captured 360-degree images of the ship’s many spaces. I intend to use my footage as a way to give my students a virtual tour of Gordon Gunter. When Jerry showed us the ship, he effortlessly moved from one place to the next. I, on the other hand, could not…at first. I felt as if I was stuck in a labyrinth. Yet, with the amount of time I will be spending on board Gordon Gunter, I am sure it will not take long to get the “lay of the land”.
This slideshow requires JavaScript.
The Galley (Kitchen)
Getting lost is not always a bad thing. I can admit that I was not too upset when I took a wrong turn and ended up in the galley (the kitchen). I could tell right away from the appetizing aroma and the fresh fruits and vegetables that the meals were going to be amazing.
After Leg 1 of the Spring Ecosystem Monitoring (EcoMon) Survey which concluded on Friday, May 26. Prior to the ship’s departure at 1400 hours on Memorial Day, the crew was busy with important maintenance and upkeep. With the adventure of a lifetime so close at hand, I could only hope that my excitement would give me at least a few hours of sleep.
Preparing for Departure (Monday, May 29)
My first dinner on board ship Gordon Gunter.
To keep everyone happy when they are living in such close quarters, working strange shifts, and so far from home, good food is vital. Isn’t it always? Gordon Gunter is well known in the NOAA community for its fantastic food. The person responsible for our delicious and abundant food is Margaret Coyle, Chief Steward and her trusted comrade, Paul Acob, Second Cook. I first experienced their culinary skills at my first 6:30 a.m. breakfast. Remarkable! I could not wait for the meals to come.
Margaret has worked on NOAA Ship Gordon Gunter for 13 years! Before NOAA, Margaret was in the Coast Guard for four years and her husband retired from the Coast Guard with 21 years of service. Margaret makes almost every dish from scratch—from juices to hummus. She is dedicated to providing a variety of meals that not only fill bellies but satisfy taste buds. You never quite know what to expect one meal to the next, and that my friends is the spice of life! Paul has spent 14 years with NOAA and 20 years in the Navy—that’s 34 years at sea! I greatly admire both Paul and Margaret for their service and continued commitment.
As a Teacher at Sea, I am an active member of the science team. I have been assigned the day shift, which means I work from 12 noon to 12 midnight. I am happy with this shift because it is a little more of a regular schedule compared to beginning work at midnight and then sleeping during the daylight hours. However, it will definitely take time for me to adjust my eating and sleeping schedules with that of my work shift.
In preparation for our work at sea, we spent the afternoon reviewing guidelines and proper procedures. Safety is crucial on any ship, and I feel much better having gone through the welcome orientation. Now, I am prepared when it is time to perform any of the three emergency drills: fire, abandon ship, and man overboard. One can never be too cautious.
The Gulf of Maine. Photo courtesy of NOAA.
The second leg of the 2017 Spring EcoMon Survey consists of research at oceanography stations in the Georges Bank and the Gulf of Maine. These stations are randomly distributed and progress of the survey will depend on transit time, sea state, and water depth of the stations. Our research will calculate the spatial distribution of the following factors: water currents, water properties, phytoplankton, microzooplankton, mesozooplankton, sea turtles, and marine mammals.
NOAA Flag
At 2:07 p.m. (our scheduled departure time), Gordon Gunter cast off from Coddington Cove at the Naval Station Newport. As we approached the Newport Bridge I took photos of the NAVY War College, Herring gulls nesting on a small island, passing ski boats, and the ocean view cottages. On the flying bridge an expert in magnetic compasses calibrated the ship’s mechanism and cleared the compass of excess debris.
Compass Adjustment/Calibration
During a personnel transfer using the Fast Rescue Boat (FRB), a mechanical issue was identified and the ship needed to head back to the pier. The Commanding Officer, Lieutenant Commander Lindsay Kurelja, informed us that we would begin our journey at 9:00 a.m. the next day, May 30.
Science and Technology Log
My head has been spinning with the different types of equipment and technology on board Gordon Gunter. I have a lot to learn! I would like to share a small bit of information about two important pieces of equipment that will be essential to our research in the coming days.
Bongo Nets
1.) Since the majority of plankton is too small to see with the naked eye, these organisms must be viewed through a microscope. To do this, plankton must be collected from the ocean. You might be thinking, “But how? They are too small to catch.” That’s why we use bongo nets! Bongo nets allow scientists to strain plankton from the water using the bongo’s mesh net. Plankton and other matter from the sea will be deposited into a bucket at the end of the net which is called a cod-end. Different sized nets are used to capture different types of plankton. The bongo nets will be towed slowly through the water at each oceanography station we come to. I am looking forward to using the ship’s bongo nets to investigate marine life in Georges Bank and the Gulf of Maine.
CTD (Conductivity, Temperature, and Depth)
2.) At each station of this leg of the EcoMon survey, we will use a CTD device to determine the Conductivity, Temperature, and Depth of the ocean. On Gordon Gunter, the CTD is incorporated into a rosette, or carousel. This allows us to collect water samples from various depths at the same location. The CTD will give scientists a broad picture of the marine environment in the Northeast Atlantic.
At Pier 2 at Naval Station Newport were gigantic buoys the Coast Guard had recently cleaned and re-painted. Do you know why some are green and some are red? The colors help aid the navigation of ships. The red buoys are on the right/starboard side of the ship, and the green buoys should be on the left/port side of the vessel when heading upstream. I guess ships have their own rules of navigation just like vehicles on the road.
Geographic Area of Cruise: Pacific Ocean from San Diego, CA to San Francisco, CA
Date: April 1, 2017
Weather Data from the Bridge
Time 8:51 PDT,
Current Location: South West of Santa Rosa Island, Latitude 33.37N Longitude -120.7 W
Air Temperature 13.4 oC (56.1 oF)
Water Temperature 13.1 oC (55.5 oF)
Wind Speed 12 kts
Barometric pressure 1013.98 hPa
Science and Technology Log
Oceans cover 71% of the surface of Earth and 99% of the livable space (Figure 1). The Coastal Pelagic Survey is taking several approaches to map the distribution of anchovy, sardine, and other target species within the epipelagic zone. This zone is the thin surface layer extending to the depths light penetrates the ocean, which is approximately 200 meters near California. The epipelagic zone in some coastal areas is very productive due to the upwelling of nutrient rich water causing an abundance of primary production by phytoplankton. Besides the net trawling and acoustic transects, the researchers are using samples of fish eggs and ichthyoplankton (ichthyo = fish, plankton = drifting) to determine locations of spawning. This voyage is mostly surveying over the continental shelf and I am amazed at the diversity of organisms we have found thus far. In this modern era of exploration of the vastly unknown deeper regions, I can only imagine the species still to be discovered!
Figure 1: Ocean Layers
(c) Knight, J.D., 1998, Sea and Sky, http://www.seasky.org/deep-sea/ocean-layers.html
CUFES:
A CUFES (Continuous Underway Fish Egg Sampler) system is used to determine the location of fish eggs as we travel transects on a continuous daily basis (Figure 2). Water from 3 meters below the surface is pulled into the boat at 640 L/min. and poured through a filter to collect fish eggs and other plankton. The collected samples are analyzed every 30 minutes to determine a density of eggs and which species are spawning. The collected samples are further analyzed at NOAA’s SWFSC (Southwest Fisheries Science Center) in La Jolla, CA.
Figure 2: CUFES Schematic
CUFES schematic.
Figure 3: Preliminary Results of CUFES Survey
Preliminary results of the CUFES survey. The CUFES data is overlaid on sea surface temperatures measured by satellite.
The CUFES data is overlaid on sea surface temperatures measured by satellite.
PairoVET Tow & Bongo Tow
A PairoVET (paired vertical egg tow) sample is collected using a pair of small, fine mesh nets dropped to 70 meters deep and vertically towed to the surface to collect fish eggs and zooplankton in the water column at predetermined locations along our transects every 20 nautical miles. This is generally the depths that sardine release their eggs. The Bongo net gets its name because the nets are the size of bongo drums (Figure 4 & 5). This is a plankton tow that is pulled alongside the ship and occurs every 40 nautical miles. The net is dropped to a depth of 210 meters and pulled up at a 45 degree angle to get a more complete sample of the ichthyoplankton and zooplankton throughout the water column at location.
Figure 4: Bongo net in center of image and PairoVET on the right.
Bongo net in center of image and PairoVET on the right.
Figure 5: Bongo going overboard.
Bongo going overboard.
Figure 6: Preserving the Bongo Sample for later analysis.
TAS Chris Tait preserves the Bongo Sample for later analysis
CTD: Conductivity, Temperature and Depth Probe
The scientists use a CTD (conductivity-temperature-depth) probe to measure the physical properties of the seawater throughout the water column that biologic samples are being taken (Figure 7). Conductivity is used to calculate the salinity of the water. These physical properties are very important in determining the types of organisms that are present at varying locations.
Figure 7: CTD (Conductivity Temperature Depth) Analysis
CTD (Conductivity Temperature Depth) analysis
Personal Log
One of the great mysteries of waking up is answering the question of “where am I?” After a long evening of trawling for fish and keeping an eye on where you are, you go to bed. Exhausted, the boat rocks you to sleep. When I wake up the first thing I do is, jump out of bed and run out onto the front deck. Some days, there is ocean for as far as the eye can see, some days a mysterious island (Figure 8) in the distance and sometimes there is the mainland (Figure 9)! I run to grab my phone when mainland is in sight to get a couple of phone calls out to family.
Figure 8: The mysterious island turns out to be Anacapa Island, which is part of the Channel Islands National Park. The waters surrounding the park are part of a national marine sanctuary.
Anacapa Island, one of the Channel Islands
Figure 9: Sunrise over Santa Barbara. Time for me to make a call home!
Sunrise over Santa Barbara
In the Dry Lab there is a computer with a map showing where we are currently located, a red track line showing where we have been and transect lines displaying where we will soon be (Figure 10). On our acoustic transects, we follow the parallel lines to mow the lawn and find the location of the CPS (coastal pelagic species) from their echoes. When we trawl, we break transect and go to places that showed promise in the acoustic backscatter.
Figure 10: Without tracking our location on the computer I would feel totally lost! The blue lines are where we plan to go, and the red lines show where we’ve actually gone.
Blue lines show where we plan to go, and the red lines show where we’ve actually gone.
Catch of the Day
As I get ready for my night shift, I feel this anticipation to discover what species we are going to find! Every day brings a new catch of the day!
Grey Smoothhound Shark (Mustelus californicus): This small coastal shark feeds on small invertebrates and fish.
Gray Smoothhound Shark (Mustelus californicus)
Needle Fish (Family Belonidae): This large needle fish is coastal piscivorous fish, meaning they specialize at eating other fish. They have a mouth full of tiny needle like teeth to prevent a slippery fish from getting away.
Needle Fish (Family Belonidae)
Northern Anchovy (Engraulis mordax): This is one of our target species on this survey. Anchovy have the potential to form massive schools and have a tremendous impact of the ecology of the California Current Ecosystem. They feed on zooplankton, provide food for other fish, sea birds, and marine mammals. They are also an important fishery which have the potential to be over fished if not properly managed.
Northern Anchovy (Engraulis mordax)
Pacific Sardine (Sardinops sagax, top specimen) and Pacific Mackerel (Scomber japonicas, bottom two specimens): These two species are also part of the Coastal Pelagic Species community, which this survey are targeting. The sardine is another very important fish due to their ability to form tremendous schools, impacting plankton through feeding, providing food for larger predators, and they are a valuable fishery. Sardine populations have the ability to boom and crash, and the cause is still not fully understood. The Pacific mackerel is a species that has been populous at times of lower sardine and anchovy abundance.
Pacific Sardine (Sardinops sagax), top, and Pacific Mackeral (Scomber japonicus), bottom two
Pacific Sardine (Sardinops sagax) and Pacific Mackeral (Scomber japonicus)
Close-up of Pacific Mackerel (Scomber japonicus)
Pacific Mackeral (Scomber japonicus)
Pacific Mackerel (Scomber japonicus)
Jack Mackerel (Trachurus symmetricus) and Larval Rockfish (Sebastes sp.): Jack Mackerel is another target species of the Coastal Pelagic Survey.
Jack Mackerel (Trachurus symmetricus) and a larval rockfish (Sebastes sp.)
NOAA Teacher at Sea David Walker Aboard NOAA Ship Oregon II June 24 – July 9, 2015
Mission: SEAMAP Bottomfish Survey Geographical Area of Cruise: Gulf of Mexico Date: July 8, 2015
Weather Data from the Bridge
NOAA Ship Oregon II Weather Log 7/7/15
The seas have remained incredibly calm, again with waves normally no higher than 1 ft. July 7, 2015 was a beautiful day, with few (FEW, 1-2 oktas) clouds in the sky (see above weather log from the bridge). Visibility from the bridge was 10 nautical miles (nm) throughout the day.
Science and Technology Log
After a run of around 16 hours, we finally arrived on the west coast of Florida to continue the survey.
Near the Mississippi River delta on Day 12, setting sail for Florida
Sunrise on Day 13 near the northern coast of Florida
Wow! The organisms caught on the west coast of Florida were entirely different from those caught west of the Mississippi. In our first trawl catch, I almost didn’t recognize a single species.
Fisheries biologist Kevin Rademacher shared with me an article, “Evidence of multiple vicariance in a marine suture-zone in the Gulf of Mexico” (Portnoy and Gold, 2012), that offers a potential explanation for the many differences observed. The paper is based on what are called “suture-zones.” A suture-zone, as defined previously in the literature, is “a band of geographic overlap between major biotic assemblages, including pairs of species or semispecies which hybridize in the zone” (Remington, 1968). In other words, it is a barrier zone of some kind, allowing for allopatric speciation, yet also containing overlap for species hybridization. As noted by Hobbes, et al. (2009), such suture-zones are more difficult to detect in marine environments, and accordingly, have received less attention in the literature. Such zones, however, have been discovered and described in the northern Gulf of Mexico, between Texas and Florida (Dahlberg, 1970; McClure and McEachran, 1992).
Portnoy and Gold note that “at least 15 pairs of fishes and invertebrates described as ‘sister taxa’ (species, subspecies, or genetically distinct populations) meet in this region, with evidence of hybridization occurring between several of the taxa” (Portnoy and Gold, 2012). The below table delineates these sister taxa. On this table, I have highlighted species that we have found on this survey.
Sister taxa found in the northern Gulf of Mexico. Highlighted are species we have encountered on this survey (Portnoy and Gold, 2012).
The figure below geographically illustrates distribution patterns of two pairs of sister species within the northern Gulf of Mexico. We have seen all four of these species on this survey, and our observations have been consistent with these distribution patterns.
Distributions of “sister taxa” within the northern Gulf of Mexico (Portnoy and Gold, 2012)
Prior to Portnoy and Gold, hypothesized reasons for the suture-zone and allopatric speciation in the northern Gulf included “(1) a physical barrier, similar to the Florida peninsula, that arose c. 2.5 million years ago (Ma) during the Pliocene (Ginsburg, 1952), (2) an ecological barrier, perhaps a river that drained the Tennessee River basin directly into the Gulf, that existed approximately 2.4 Ma (Simpson, 1900; Ginsburg, 1952), (3) a strong current that flowed from the Gulf to the Atlantic through the Suwanee Straits approximately 1.75 Ma (Bert, 1986), and (4) extended cooling during early Pleistocene glaciations occurring c. 700–135 thousand years ago (ka) (Dahlberg, 1970)” (Portnoy and Gold, 2012). Another explanation has been offered by Hewitt (1996), involving marine species being forced into different areas of refuge during the glacial events of the Pleistocene, allowing for allopatric speciation. Following the retreat of the glaciers, according to this hypothesis, these species would have been allowed to come into contact again, allowing for hybridization.
Portnoy and Gold used mitochondrial and microsatellite DNA sequence data from Karlsson et al. (2009) to “determine if estimated divergence times in lane snapper were consistent with the timing of [the above] hypothesized variance events in the suture-zone area, in order to distinguish whether the Gulf suture-zone is characterized by a single or multiple vicariance event(s)” (Portnoy and Gold, 2012).
Their results suggest that the divergence of lane snapper in the northern Gulf occurred much more recently than the hypothesized events described by Ginsberg (1952), Bert (1970), and Dahlberg (1970). These results also suggest that the explanation offered by Hewitt (1996) is an unlikely explanation for the divergence of lane snapper, for even though the time of multiple glaciations is consistent with the time of lane snapper divergence, water temperatures across the Gulf are estimated to have been within the thermal tolerance of lane snapper during these glaciations. Evidence also suggests that a shallow shelf existed during these glaciations, representing a habitat in which lane snapper could have lived.
The explanation that Portnoy and Gold favor, in terms of explaining lane snapper divergence, is one suggested by Kennett and Shackleton (1975), as well as by Aharon (2003). This explanation involves “large pulses of freshwater from the Mississippi River caused by a recession of the Laurentide Ice Sheet between 16 and 9 ka” (Portnoy and Gold, 2012). This explanation would have also allowed for potential sympatric or parapatric speciation, because it contains multiple lane snapper habitat types (carbonate sediment, as well as mud and silt bottom).
Notably, the fact that the above explanation is favored by Portnoy and Gold for lane snapper divergence does not discount the explanations of Ginsberg (1952), Bert (1970), Dahlberg (1970), and Hewitt (1996), in terms of explaining the many other examples of species divergence exhibited within the northern Gulf. It is most probable that many geological and ecological causes worked, sometimes in confluence, to create the divergences and hybridizations in species observed today. A geographical depiction of many of the hypothesized explanations described by Portnoy and Gold is below.
Geographical depiction of hypothesized triggers of species divergence in the northern Gulf of Mexico (Portnoy and Gold, 2012)
In addition to the species divergence observed in our survey, another interesting difference noted in our catches along the western coast of Florida was the emergence of lionfish. These invasive species are native to the Indian Ocean and southwest Pacific Ocean, and they were most likely introduced by humans into the waters surrounding Florida. There are two lionfish species that are invasive in Florida, P. miles and P. volitans (Morris, Jr. et al., 2008), and the earliest records of their introduction into Florida’s waters are from 1992 (Morris, Jr. et al., 2008). Many characteristics have allowed these species to be successful alien invaders in these waters – (1) they are formidable, with venomous spines and an intimidating appearance, (2) they reproduce incredibly quickly, breed year-round, and mature at a young age, (3) they outcompete native predators for food and habitat, (4) they are indiscriminate feeders with voracious appetites, and (5) they take advantage of a sea that is over-fished, in which many of their predators are regularly being eliminated by humans (Witherington, 2012).
Life cycle of the lionfish
This invasion mechanism hauntingly reminds me of that of the Cane Toad, a very famous alien invader which has decimated the flora and fauna of Australia. One of the main worrisome effects of lionfish around Florida is on coral reefs. Lionfish “can reduce populations of juvenile and small fish on coral reefs by up to 90 percent…[and] may indirectly affect corals by overconsuming grazing parrotfishes, which normally prevent algae from growing over corals” (Witherington, 2012).
Areas affected by the invasive lionfish
One of the larger lionfish (Pterios spp.) caught on Day 13
One of the ways in which Floridians are trying to eliminate this problem is through lionfish hunting tournaments. CJ Duffie, a volunteer on this survey from Florida, has participated in these tournaments and also participates in lionfish research directed by the Florida Fish and Wildlife Commission. CJ harvested the gonads of the lionfish we caught on Day 13 to take back to the lab for further analysis. Floridians also actively promote the lionfish as a delicacy, in an attempt to encourage more people to eat the invasive species. CJ described the fish as the best he has ever tried, so I was very easily intrigued. A fillet was prepared from the large lionfish caught on Day 13 fish, and Second Cook (2C) Lydell Reed was able to cook it on the spot. I agree with CJ – white, flakey, slightly sweet, this is the best fish I have ever tasted.
Volunteer CJ Duffie, removing the gonads of a lionfish
Lionfish gonads
Filleting a larger lionfish
Lionfish fillet
Personal Log
The survey is nearly over, and this will be my last post. We are in transit back to Pascagoula, Mississippi, the ship’s home port. I leave by plane from Mobile, Alabama for Austin on Friday, July 10, 2015. I am eagerly anticipating walking on land, as I’ve heard it’s strange at first after being on a boat for awhile. Apparently this weird feeling has a semi-formal name — “dock rock”.
This experience has truly been one of the best of my life, especially in terms of the raw amount I have learned every day. Coming in, the sole knowledge of fish life I had derived from my stints fly fishing with my father, and most of this knowledge concerns freshwater fish. I now feel as though I have a much more comprehensive knowledge of the biodiversity that exists in the Gulf of Mexico and a much greater appreciation for the diversity of life as a whole. I have taken over 200 photos to document this biodiversity, accumulated a diverse collection of preserved specimens, and collected a wide variety of resources (textbooks, scientific papers, etc.) on marine life in the Gulf of Mexico. These resources will surely make the preparation of a project-based activity for my students focused on this research a much easier feat.
Having fun with a sharksucker (Echeneis naucrates) during analysis of the last trawl catch
I have also learned how a large portion of marine field research is conducted. We have surveyed dissolved oxygen levels in the water, plankton biodiversity, and bottomfish biodiversity throughout the northern Gulf, using established (and quite popular) research methods. The knowledge I have gained here can be applied to the biodiversity project portion of my geobiology class, in which students conduct biodiversity surveys in local Austin-area parks and preserves. I anxiously await the comprehensive results of this summer’s NOAA survey – the complete dissolved oxygen contour map, the biodiversity indexes for different regions of the Gulf, and plankton biodiversity data from Poland. These data will definitely help me come to even more conclusions about the marine life in the Gulf and the factors affecting it.
Through this experience, I have also gained much appreciation for the diversity of careers that exist on board a NOAA research vessel. I have learned about the great work of the NOAA Corps, a Commissioned Service of the United States. I have learned from the fisherman, engineers, stewards, and other personnel on the boat, all required for a successful research survey.
First and foremost, I have to thank the science team on the night watch – fisheries biologists Kevin Rademacher and Alonzo Hamilton, FMES Warren Brown, and volunteer CJ Duffie. These individuals were instrumental in helping me identify organisms, label my photos, and craft my blog posts and photo captions. Kevin Rademacher provided me with most of the papers which I have referenced in this blog, and with no internet connectivity on the boat for around half of the trip, his library of information was essential. For the “Notable Species Seen” section of this blog, Kevin also individually went through all of my species photos with me to help me add common and scientific names in the photo captions. This took a great deal of his time, almost every day, and I am incredibly appreciative.
The rest of the night watch. From left to right — FMES Warren Brown and NOAA Fisheries Biologists Kevin Rademacher and Alonzo Hamilton
I also definitely need to thank Lead Fisherman Chris Nichols and Skilled Fisherman Chuck Godwin for their mentorship with CTD data collection and plankton sampling. In addition, many thanks to Field Party Chief Andre Debose and Lieutenant Commander Eric Johnson for proofreading my blog entries and ensuring that my experience on the ship was a good one. I enjoy learning from people much more than I enjoy learning from books, and these have been some of best (and most patient) teachers I have ever had.
Lastly, thanks so much to the NOAA Teacher at Sea staff for your work on this great program. It truly makes a difference for many teachers and many students. I have had an amazing time, and I am positive my students will benefit from what I have learned.
The ship’s path during the survey, thus far. I have been on the boat for Leg 2, drawn in black.
Did You Know?
Lionfish venom is not contained within the tips of the fish’s spines. Rather, glandular venom-producing tissue is located in two grooves that run the length of each spine. When skin is punctured by a spine, this glandular tissue releases the venom (a neurotoxin), which travels up the spine and into the wound by means of the grooves (Witherington, 2012).
Anatomy of the lionfish spine
Notable Species Seen
Lined Seahorse (Hippocampus erectus)
Lined Seahorse (Hippocampus erectus)
Sea Star (Goniaster tessellatus)
Cushion Sea Star (Oreaster grandis)
Lined Sea Star (Luidia clathrata)
Banded Sea Star (Luidia alternata)
Pencil Urchin (Stylocidaris affinis)
Spotfin Butterflyfish (Chaetodon ocellatus)
Bank Sea Bass (Centropristis ocyurus)
Fringed Filefish (Monacanthus ciliatus)
Gray Triggerfish (Balistes capriscus)
Horned Searobin (Bellator militaris)
Lancer Stargazer (Kathetostoma albigutta)
Barbfish (Scorpaena brasiliensis)
Longfin Scorpionfish (Scorpaena agassizii)
Lionfish (Pterios spp.)
Lionfish (Pterios spp.)
Bigeye Searobin (Prionotus longispinosus
Blue Angelfish (Holacanthus bermudensis)
Dusky Flounder (Syacium papillosum)
Bluespotted Searobin (Prionotus roseus)
A Chace Slipper Lobster (Scyllarus chacei), doing handstand pushups
NOAA Teacher at Sea David Walker Aboard NOAA Ship Oregon II June 24 – July 9, 2015
Mission: SEAMAP Bottomfish Survey Geographical Area of Cruise: Gulf of Mexico Date: July 5, 2015
Weather Data from the Bridge
NOAA Ship Oregon II Weather Log 7/5/15
This has been some of the smoothest water I’ve seen yet on the ocean. At times, you can’t even see wave motion on the surface of the ocean, and it looks more like a lake. On July 5, 2015, waves were estimated to be 1 ft. in height, at most (see above weather log from the bridge). Sky condition on July 5 began as scattered (SCT, 3-4 oktas), moved to broken (BKN, 5-7 oktas) and overcast (OVC, 8 oktas) by the afternoon and evening, and then returned to FEW (1-2 oktas) by 11 PM. There was rain observed in the vicinity (VC/RA) at 4 PM, and some lightning (LTG) was observed in the late evening.
Science and Technology Log
The survey is still progressing smoothly. We have just crossed the Mississippi River delta, and I have observed a much greater human presence in the water — many ships, mostly commercial shrimping vessels, and even more oil rigs than usual.
A shrimping boat near the Mississippi River delta
Oil rigs near the Mississippi River delta
Of particular interest to me, we have caught many new species over the past couple of days. One notable new catch on Day 11 was a giant hermit crab (Petrochirus diogenes), the largest species in the Gulf of Mexico. In most cases, hermit crabs need to be removed from their shells in order to be successfully identified. This process was much more difficult than I had imagined, and I ended up having to use a hammer to crack the shell. The crab contained within was indeed large – it amazed me that such a large species could occupy such a moderately-sized shell. After analyzing the crab in the laboratory, we quickly returned it to the ocean, in the hope that it would find another shell in which to occupy and survive.
Another interesting catch on Day 11 was a seabiscuit (Brissopsis alta). This organism was caught at a station overlying a sandy/muddy bottom, this type of seafloor environment providing a habitat for these unique creatures. We were able to prep the seabiscuit with bleach in the same manner in which we prepped the sand dollars a couple of days ago. The product was a purely white – a very delicate, yet quite beautiful specimen for my classroom. Much thanks to fisheries biologist Kevin Rademacher for his help in preparing these organisms.
Giant Hermit Crab (Petrochirus diogenes), freshly extricated from shell. This is the largest hermit crab species in the Gulf, and they can get up to three times this size.
Seabiscuit (Brissopsis alta), as taken from the ocean
Seabiscuit (Brissopsis alta), after treatment in bleach solution
On Days 11 and 12, we caught some particularly large individuals, which made for great photo opportunities. On Day 11, we caught the largest roundel skate (Raja texana) that we’ve seen yet, and on Day 12, we netted a large gulf smoothhound (Mustelus sinusmexicanus), a shark species that interestingly has no teeth. The rest of the night shift was encouraging me to take a photo with my hand down the shark’s mouth, but I settled for the typical catch photo. This shark was swiftly returned to the water (head first) after laboratory analysis was conducted, and it survived the catch.
The roundel skate caught on Day 11
The gulf smoothhound, a shark sans teeth
As we have to open up fish in order to sex them, it is a natural investigative temptation to look at the other anatomy inside the fish. A usual focal point is the stomach, as many times, fish stomachs are very disproportionately bloated. Many times, enlargement of organisms such as the air bladder, stomach, and eyes of caught fish is due to barotrauma. When a fish is quickly taken from deep waters to the surface, the pressure rapidly decreases, causing internal gases to expand. In certain cases, we have discovered very recently eaten fish inside organisms’ stomachs. One particularly interesting example was the stomach of a threadtail conger (Uroconger syringinus), in which we found a yellow conger (Rhynchoconger flavus) of equal size!
We found the yellow conger on the right inside the stomach of the threadtail conger on the left! Photo credit to Kevin Rademacher.
I have started to realize the very subtle differences between some species. One great example of such subtle variance is found in two similar sole species – the fringed sole (Gymnachirus texae) and the naked sole (Gymnachirus melas). The naked sole contains a faint secondary stripe in between each of the bold stripes on its back; the fringed sole does not have this stripe. During our initial sorting of species, I unwittingly threw both of these species into the same basket. Fortunately, fisheries biologist Kevin Rademacher noticed what I was doing and identified the distinguishing phenotypic difference. I have adjusted the brightness, contrast, and shadowing of the below photos to make the difference in striping more apparent.
Fringed Sole (Gymnachirus texae)
Naked Sole (Gymnachirus melas)
Flatfish, such as the soles above, have a very interesting developmental pattern from juvenile to adult. Fisheries biologists Kevin Rademacher and Alonzo Hamilton were able to nicely summarize it for me. As juveniles, they start off with eyes on both sides of their heads and swim in the same manner as normal fish. However, once they get large enough to swim out of the current, they “settle out” onto the seafloor. At this time, a very interesting series of morphological changes takes place. Notably, the eyes of the fish migrate such that they are both on one side of the fish’s body. This morphological change has clearly been evolutionary favored over generations, as it allows the fish to see with both of its eyes while slithering along the seafloor. The side of the fish on which the eyes end up depends on the particular species of fish. Flatfish are accordingly categorically defined as “right-eyed” or “left-eyed,” based on the side of the fish containing the eyes. The procedure is fairly simple to define a flatfish a right-eyed or left-eyed.
Look down at the side of the fish containing both of the eyes.
Orient the fish such that the eye that migrated from the opposite side is on top.
If the head faces left, the flatfish is defined as left-eyed.
Otherwise, it is defined as right-eyed.
Southern Flounder (Paralichthys lethostigma)
Mouth and eyes of a Southern Flounder (Paralichthys lethostigma), a left-eyed flatfish
On many occasions, we have been able to keep some of our catch to later eat. I have had fresh white shrimp, brown shrimp, red snapper, lane snapper, vermillion snapper, hogfish, and even paper scallops. I have obtained lots of practice heading shrimp and fileting fish, as well as shucking scallops. It has been very interesting to visualize the entire process, from catch to table. It is true what they say, incredibly fresh seafood tastes much better. Most of the credit here goes to Chief Steward (CS) Mike Sapien and Second Cook (2C) Lydell Reed, the chefs on the ship.
Heading some particularly large brown shrimp to give to the galley
Size discrepancy in brown shrimp. We only kept the larger ones to eat.
Also after my shift, I was able to visit the ship’s bridge for the first time during the day. The environment at night is quite different on the bridge, as the NOAA Corps Officers driving the ship need to keep their eyes adjusted to the dark. Accordingly, the only lights used in the bridge at night are red, reminding me of the lights used by the scientists I observed on a recent night trip to the UT McDonald Observatory. My trip to the bridge during the day allowed me to observe the operation of the ship and many instruments clearly for the first time. It was honestly quite intimidating — so many instruments, controls, and dials, and I had no clue what any of them did. I was very scared to touch anything – the only instrument with which I braved to interact was a very nice pair of binoculars. The ship is always driven by NOAA Corps Commissioned Officers. During the time of my observation, Ensign (ENS) Laura Dwyer, a Junior Officer, and Lieutenant Junior Grade (LTRG) Larry Thomas, the ship’s Operations Officer, were on the bridge. The Captain (Commanding Officer) of the ship, Master David Nelson, entered and exited periodically. ENS Dwyer was very kind to point out to me different instruments on the bridge and discuss the operating of the ship. Interestingly, the NOAA Ship Oregon II operates on a system similar to that of a car with a manual transmission – while the ship has two engines instead of one, each engine has a clutch. There is also a controllable pitch system that allows the operator of the ship to change the angle of the propeller. There are two RADAR devices, as well multiple GPS navigational systems, on which the stations of the survey are plotted. The are multiples of each of these important ship systems as a safety measure. Despite the GPS systems, the ship still has a chart table on the bridge, and even a chart room, where routes are plotted out in more detail. The helm, which controls the rudder, is still a large, prominent wheel, just as it was in the pirate stories I read as a child. ENS Dwyer told me, however, that helms are much more abbreviated in appearance in more modern ships. She indicated that many members of the NOAA Corps appreciate the “vintage” feel of the bridge of the NOAA Ship Oregon II — the ship will be 50 years old in 2017!
Lieutenant Junior Grade (LTRG) Larry Thomas on the bridge
The helm of the ship
Engine throttles and controllable pitch system
GPS navigational system
A navigational chart on the bridge
RADAR system
We have more or less finished the intended stations for Leg 2 of this survey, but as we still have time left before we are due back in port, we have received orders to proceed through to Leg 3 stations. These stations are entirely across the Gulf of Mexico, along the western coast of Florida. The traveling time there is over 14 hours by boat, and we will be traveling more or less as the crow flies. I am really looking forward to these new stations, as I have heard the biodiversity is vastly different.
Sections of the 2015 SEAMAP Bottomfish Survey
Personal Log
Ever since my shift on Day 11, in which I felt particularly fatigued and engorged, I have been completing cardio workouts daily. There is quite a bit of workout equipment stored in various places throughout the ship, and I have finally found an enjoyable cardio workout. I am using a rowing machine that I found on the top deck of the ship, and I set it up to face the direction of the ship’s movement. In this way, when I row, I feel as though I am actually pushing the boat through the water. The wave motion and periodic jostling of the ship makes the rowing machine feel even more like the real thing, and I am forced to recall my days rowing at the crack of dawn on Lake Dunmore near Middlebury, Vermont while in college.
My workout setup on the top deck of the ship
The Fourth of July on the boat was free of any special pomp and circumstance. It was, more than anything, just another work day. Fortunately, all of the employees on the boat get paid overtime for working this day, as well as weekend days. I definitely missed the Zilker fireworks celebration in Austin (TX), but it was meaningful to be on a boat with members of the NOAA Corps, a Commissioned Service of the United States, on this important day for America.
I have made significant progress in Tender is the Night and am almost finished. I have also spent free time watching the FIFA Women’s World Cup and the Wimbledon Championships on the satellite television upstairs.
Regarding my sleep, I have finally stopped taking Dramamine®. Lo and behold, I have had no more nightmares, this lending further support to my theory that Dramamine® was the cause.
The days are still very exciting, and I have yet to encounter a day without a great deal of fresh learning. On to Florida!
Did You Know?
The Navy Motion Picture Service provides encrypted DVDs for use on deployed ships. In the upstairs lounge, there are well over 700 DVDs, from classics to quite new releases, organized for anyone to watch in their free time.
On of the many DVD binders on the ship, courtesy of the Navy Motion Picture Service
Giant Hermit Crab (Petrochirus diogenes), freshly extricated from shell. This is the largest hermit crab species in the Gulf, and they can get up to three times this size.
Squat Lobster (Munica forceps)
Black Coral (Antipathes)
Giant Tun (Tonna galea)
Yellow Eggcockle (Laevicardium mortoni)
Delta Macoma (Macoma pulleyi
Stiff Penshell (Atrina rigida)
Baughman’s Ark (Anadara baughmani)
Cancellate Cone (Conus cancellatus)
White Giant-Turris (Polystira albida)
Seastar (Astropecten duplicatus)
Brittlestar (Ophiolepis elegans)
A marine isopod (Isopoda) — notably, the same order as the pill-bug, or roly-poly (Armadillidium vulgare)
Fireworm (Amphinomidae)
Mantis Shrimp (Squilla chydaea)
Snapping Shrimp (Alpheidae)
Rose Shrimp (Parapenaeus politus)
Peppermint Shrimp (Plesoionika longicauda)
Spiny Rock Shrimp (Sicyonia burkenroadi)
Longfin Squid (Loligo pealei)
Offshore Tonguefish (Symphurus civittatium)
Luminous Hake (Steindachneria argentea)
Oyser Toadfish (Opsanus tau)
Rough Scad (Trachurus lathami)
Southern Hake (Urophycis floridana)
Whitespotted Soapfish (Rypiticus maculatus)
Northern Sennet (Sphyraena borealis) — Related to the Great Barracuda
Blackbar Drum (Pareques iwamotoi)
Silver Jenny (Eucinostomus gula)
Ragged Goby (Bollamannia communis)
Longspine Porgy (Stenotomus caprinus)
Gulf Smoothhound (Mustelus sinusmexicanus) – A toothless shark!
NOAA Teacher at Sea David Walker Aboard NOAA Ship Oregon II June 24 – July 9, 2015
Mission: SEAMAP Bottomfish Survey Geographical Area of Cruise: Gulf of Mexico Date: July 3, 2015
Weather Data from the Bridge
NOAA Ship Oregon II Weather Log 7/2/15
Weather has fortunately continued to be calm. The only main deviation from clear skies has been haziness (symbolized “HZ” on the above weather log from 7/2/15). On 7/2/15, sky condition varied from FEW (3-4 octas) in the very early morning, to SCT (3-4 octas) and BKN (5-7 octas) at midday and afternoon, to SCT (3-4 octas) in the evening and night. Swell waves have varied throughout the past couple of days, from less that 1 meter to around 3 meters in height.
Science and Technology Log
The past few days honestly blend completely together in my mind. I feel as though I have reached an equilibrium of sorts on the boat. The night shift has proceeded normally – station to station, trawl to trawl, CTD data collection at each station, plankton collected periodically throughout the shift. Certain trawl catches have been exceptionally muddy, which poses a further task, as the organisms must first be separated from all of the mud and cleaned, before they can be identified.
A fairly standard catch, loaded onto the belt, yet to be sorted
A sorted catch, ready for measuring and weighing
In addition, on Day 6, the trawl net was damaged on a couple of occasions. I’ve realized that a trawl rig is quite the complicated setup. The trawling we are doing is formally called “otter trawling”. Two boards are attached at the top of the rig to aid in spreading out the net underwater. To allow the net to open underwater, one of the two lead lines of the net contains floats to elevate it in the water column. A “tickler chain” precedes the lead lines to stir fish from the sea floor and into the net. The fish collected by the net are funneled into the terminating portion of the net, called the “cod end”. FMES Warren Brown is an expert when it comes to this entire rig, and he is in charge of fixing problems when they arise. On Day 6, Warren had to fix breaks in the net twice. With help from Lead Fisherman Chris Nichols and Skilled Fisherman Chuck Godwin, new brummel hooks were attached to the head rope for one of the door lifting lines, and a new tickler chain was installed.
Cross-sectional diagram of an otter trawl (Image Source – Penobscot Marine Museum)
FMES Warren Brown measuring out a new “tickler chain” for the net
Lead Fisherman Chris Nichols and Skilled Fisherman Chuck Godwin installing a new brummel hook to the head rope for one of the door lifting lines (caption source – FMES Warren Brown)
I also learned a lot more of the specifics involved in the workup of the plankton catch. The dual bongo contains two collection nets in parallel. Plankton is removed from the cod ends of these nets, but not combined. The plankton from the left bongo is transferred to a mixture of formaldehyde (10% v/v) and sea water for preservation. The plankton from the right bongo is transferred to 95% ethanol. The reason for this is that different solvent mixtures are needed to best preserve different parts of the plankton in the sample. The formaldehyde solution is best for fixing tissue, yet it tends to dissolve hard parts (for example, otoliths, discussed below). The ethanol solution is better for preserving hard parts (bones, cartilage, etc.). This explains the need for two bongos. Workup of collected plankton from the Neuston net is similar, except many non-plankton species are often collected, which have to be removed from the sample. Highlight non-plankton species from the past couple days have been sailfin flyingfish (Parexocoetus brachypterus) and a juvenile billfish (Istiophoridae). Neuston-collected plankton is transferred to 95% ethanol. This solvent is the only one needed here, as only DNA analysis and stock assessment are conducted on Neuston-collected plankton. All plankton is shipped to Poland, where a lab working in collaboration with NOAA will analyze it. Samples are broken down according to a priority species list sent by NOAA.
Fisheries biologist Kevin Rademacher and Skilled Fisherman Chuck Godwin lower to bongo nets into the water for data collection
Plankton from the left bongo, preserved in a mixture of formaldehyde (10% v/v) and sea water
Plankton from the right bongo, preserved in 95% ethanol
Plankton from the neuston net, preserved in 95% ethanol
A sailfin flyingfish (Parexocoetus brachypterus) caught with the Neuston net
A juvenile billfish (Istiophoridae) caught with the Neuston net. It has been placed in a disposable plastic spoon for scale.
The CTD survey is coming along nicely. Progress through July 1 is shown on the below bottom dissolved oxygen contour. Similar trends to those commented on in my last blog post continue to be observed, as a further area of hypoxia has been exposed near the coastline. You can see that our survey is progressing east toward Mississippi (we will finish this leg in Pascagoula, MI, though the survey will continue on to the Florida coast during Leg 3).
Updated bottom dissolved oxygen contour map, from CTD data (progress through July 1, 2015)
Rinsing off the CTD instrument with fresh water after data collection
A couple of other distinct memories stand out in my mind from the past couple of days:
Sexing “ripe” fish. Sometimes, certain species of fish are so fertile over the summer that certain individuals are deemed “ripe”. Instead of cutting into these fish, they can be more easily sexed by applying pressure toward that anus and looking for the expression of semen or eggs. One of the species for which this technique is most often applied this time of year is the Atlantic cutlassfish (Trichiurus lepturus). One must be careful, however, for as I found out, the gametes sometimes emit from the anus with much force, shooting across the room. It only takes wiping fish semen off of your face once to remember this forever.
Flying fish. I saw my first flyingfish (Exocoetidae) during a plankton collection with the neuston net. The net would scatter the fish, and they would fly for cover, sometimes 10-15 meters in distance. Amazing.
Preparing sand dollars. Interestingly, the sand dollars we caught (Clypeaster ravenelii) looked brown/green when they came out of the ocean. Sand dollars are naturally brownish, and in the ocean, they are most often covered in algae. We kept a couple of these organisms to prepare. To prepare, we first placed the sand dollars in a dilute bleach solution for awhile. We then removed them and shook out the sand and internal organs. We then placed them back in the bleach for a little longer, until they looked white, with no blemishes. The contrast between the sand dollar, as removed from the ocean, and this pure white is quite remarkable.
Sand dollar (Clypeaster ravenelii), as removed from the ocean
Fisheries Biologist Kevin Rademacher rinsing off sand dollars (Clypeaster ravenelii) before placing them in bleach solution
Sand dollar (Clypeaster ravenelii), after bleach treatment
Otoliths. Fisheries biologist Kevin Rademacher showed me a nifty way to remove the otoliths from fish. Otoliths, “commonly known as ‘earstones,’ are hard calcium carbonate structures located behind the brain of bony fishes,” which “aid fish in balance and hearing” (Florida Fish and Wildlife Conservation Commission). When viewed under microscope and refracted light, otoliths show a pattern of dark translucent zones (representing period of quick growth) and white opaque zone (representing periods of slower growth). By counting the white opaque zones (called “annuli”), fisheries biologists can estimate the age of the fish. Granted, this process differs for different fish, as different fish species have different otolith size. Accordingly, a species standard is always prepared (usually a fish raised from spawn, from which the otoliths are taken at a known age) to estimate the growth time associated with one whole annulus for the particular species. Sample otoliths are compared to the standard to estimate age. Otolith analysis also allows scientists to estimate “growth rates,…age at maturity, and trends of future generations” (Florida Fish and Wildlife Conservation Commission). On this survey, we only take otoliths from fish that are wanted for further laboratory analysis, but are too large to store in the freezer. On some surveys, however, otoliths are removed from all fish caught. I got to remove the otoliths from a large red snapper (Lutjanus campechanus). The first step is to make an incision to separate the tongue and throat from the lower jaw. The hand is then inserted into the hole created, and using a fair bit of force, the throat and gills are ripped away from the head to expose the vertebrae. The gills are then cut from the base of the vertebrae, to expose the bony bulb containing the sagittal otoliths. Diagonal cutters are then used to crack open the boney bulb containing the sagittal otoliths, and the otoliths are removed using forceps.
Cutting off the gills form the base of the vertebrae to expose the boney bulb containing the sagittal otoliths
Using diagonal cutters to crack open the boney bulb containing the sagittal otoliths
Sagittal otoliths, freshly removed for a large red snapper (Lutjanus campechanus)
Personal Log
I am still feeling great on the boat. The work is quite tiring, and I usually go straight to the shower and the bed after my shift ends. Interestingly, I think I’m actually gaining quite a bit of weight. The work is hard and the food is excellent, so I’ve been eating a bunch. I’ve been getting 7-8 hours of sleep a night, which is more than I normally get when I am at home, especially during the school year. One thing I have been noticing ever since the trip started is that I have been having quite nightmarish dreams every night. This is rare for me, as I usually either don’t have dreams or can’t remember the ones that occur. I initially thought that this might be due to the rocking of the boat, or maybe to the slight change in my diet, but I think I’ve finally found the culprit – Dramamine®. Research has indicated that this anti-motion sickness drug can cause “disturbing dreams” (Wood, et al., 1966), and I have been taking this medication since the trip started. This hypothesis is consistent with the observation that my nightmares lessened when I reduced my daily Dramamine® dose from 2 pills to one. I finished Everything is Illuminated and have begun a new novel (Tender is the Night, by F. Scott Fitzgerald). I am now well into the second week of my trip!
Did You Know?
Earrings can be made from fish otoliths (ear stones). These seem to be quite popular in many port cities. Check out this article from the Juneau (Alaska) Empire Newspaper.
NOAA Teacher at Sea David Walker Aboard NOAA Ship Oregon II June 24 – July 9, 2015
Mission: SEAMAP Bottomfish Survey Geographical Area of Cruise: Gulf of Mexico Date: Monday, June 29, 2015
Weather Data from the Bridge
NOAA Ship Oregon II Weather Log 6/28/15
Weather remained quite calm through Days 3-5. I observed a couple minor rain showers during the night shift. As noted in the above weather log from the bridge, hazy weather (HZ) on multiple occasions during Day 4. Sky condition on Day 4 went from 1-2 oktas in the morning (FEW), to 5-7 oktas (BKN), to 8 oktas (OVC) by midday. The sky cleared up by the evening.
Science and Technology Log
Day 3 was incredibly busy. There were no breaks in the 12 hour shift, as there were many trawl stations, and each catch contained a very large amount of shrimp.
According to many on deck, the shrimp catches on Day 3 would have been deemed successful by commercial shrimping standards. I got lots of good practice sexing the shrimp from the catch — I sexed over 2000 shrimp on Day 3 alone. Sexing shrimp is fairly easy, as the gonads are externally exposed.
I also learned how to sex crabs. This is also a simple process, as there is no cutting involved (see graphic below). The highlight of the day was the landing of a really large red snapper. They let me take a picture with it before taking it inside for processing. I was absolutely exhausted at the end of Day 3 and completely drenched in a mixture of sweat, salt water, and fish guts.
Preparing to sort a large shrimp catch
Northern Red Snapper (Lutjanus campechanus) — the heaviest fish I’ve ever held
How to determine the sex of a crab (Source — Fisheries and Oceans, Canada)
Day 4, in contrast, was very slow. The trawl net broke on one of the early stations, so the research was delayed for quite awhile. In fact, in my entire 12 hour shift, we only had to process two catches. We were able to complete all CTD, bongo, and Neuston stations, however, quite efficiently. I have gotten to the point where I can serve as the assisting scientist for the CTD, bongo catch, and Neuston catch on my own. This data also requires two fisherman on hand — one to operate the crane, the other (along with me) to guide the device or net into the water. The fishermen with whom I most commonly work are Lead Fisherman Chris Nichols, Skilled Fisherman Chuck Godwin, and Fisheries Methods and Equipment Specialist (FMES) Warren Brown (see photo).
On Day 5, I got great practice sexing a wide variety of fish. An incision is made on the ventral side of the fish, from the anus toward the pectoral fin. After some digging around inside the fish, you will find the gonads — either ovaries (clear to yellowish appearance with considerable vasculature, round in cross-section often many eggs) or testes (white appearance, triangular in cross-section). As you might guess, larger fish are much easier to sex than smaller ones, and the ease of sexing is also species dependent. To make matter even worse, many fish are synchronous hermaphrodites (containing both male and female sex organs), and some are protogynous hermaphrodites (changing from female to male during the course of life). The ease of sexing is also species dependent. For instance, I have found the sexing of adult puffer fish and lizardfish to be quite easy (very easily defined organs), however I have experienced considerable difficulty sexing the Atlantic menhaden (too much blood obscuring the organs).
The Neuston net, collecting plankton from the water surface
Fishermen of the night watch aboard the NOAA Ship Oregon II — From left to right, FMES Warren Brown, Skilled Fisherman Chuck Godwin, Lead Fisherman Chris Nichols
Sexing a red snapper (Lutjanus campechanus)
Field Party Chief Andre DeBose provided me with a hypoxia contour chart (see below), representing compiled CTD data from Leg 1 and the beginning of Leg 2. According to DeBose, these contour charts are generated by the National Coastal Data Development Center (NCDDC) once out of around every 10 stations, and they represent an average of data taken by station near the ocean floor. A data point is defined as hypoxic if the dissolved oxygen content is below 2 mg/L. On the below chart, you can see that many hypoxic areas exist along the Texas coast, near the shore.
Dissolved oxygen contours for water at ocean bottom — Plotted data thus far from the SEAMAP Summer Survey (June 9 – 26, 2015)
I could not wrap my head around why this trend exists in the data, as I figured that shallower water would be warmer, allowing for more plant life in greater density, and accordingly more dissolved oxygen in greater density. Fisheries Biologist Alonzo Hamilton helped me better understand this trend. The fact that the water is warmer in shallower areas means that more of the dissolved oxygen leaves the surface of water in these areas. In addition, while plant life is indeed in greater concentration in shallower water, so is the concentration of aerobic microbes. These organisms use up oxygen through respiration to decompose organic matter. You can see on the above graphic that the greatest hypoxia is found in areas near major runoff (e.g. Matagorda Bay and Galveston Bay). Among other things, this runoff feeds nitrates from plant fertilizer into the ocean, which supports growth of more algae (in the form of algal blooms). Aerobic microbes decompose this excess organic matter once it dies, taking further oxygen from the water. Although it seems counterintuitive, at least to me, the greater heat and greater organism density actually leads to a more hypoxic environment.
I am slowly getting better with the species names of aquatic organisms, but as of now, I am still focusing on common names. The common names often relate to the fish’s phenotype, and this helps me recall them with more ease. Common name knowledge, however, is fairly useless when it comes to entering the organisms into the computer during species counts, as the computer only has scientific (Latin) names in its database. I hope to learn more scientific names as the week progresses.
I am also slowly amassing a really interesting collection of organisms to take back with me to LASA High School. CJ Duffie taught me how to inject crabs with formaldehyde to preserve them. Upon return to port, I will spray these crabs with polyurethane, to preserve the outer shell. I have also been preserving different organisms in jars with 20/80 (v/v) formaldehyde/saltwater. If you know me, you know I love collecting things, so this process has been particularly enjoyable. Fisheries Biologists Alonzo Hamilton and Kevin Rademacher have been very supportive in helping me collect good specimens for my classroom.
Personal Log
Life on the ship is very enjoyable. My bed is comfortable, the work is exciting, the meals are excellent, and the company is gregarious. However, I have completely lost track of time and date. My “morning” is actually 11 PM, and my “evening” is actually 1 PM. Accordingly, my “lunch” is actually breakfast, and my “breakfast” is actually lunch. I also never have any idea what day of the week it is. I called my girlfriend yesterday and was surprised to hear that she was not at work (it was a Sunday).
Regarding this blog, I have finally found the optimal time to write and upload photos. As the satellite internet is shared by all of the ships in the area, it is not possible to access WordPress during the daytime. Accordingly, I do all of my uploading and most of my writing between 2 and 6 AM. This works for me, as long as I can find time for the blog between research stations.
I really enjoy the people on the night shift. Kevin Rademacher, Alonzo Hamilton, and Warren Brown provide such a wealth of knowledge. These three are absolute experts of their craft, and it is a true honor to work with them. I am nearing the end of my first week on the ship, and I am still learning just as much as I was on my first day – this is incredibly exciting.
I have found that Alonzo really enjoys the TV show, “Chopped,” as it seems to be on every time I enter the dry lab. It is pretty interesting to observe him watching the show, as he enthusiastically comments on all of the dishes and regularly predicts the correct winner.
I am also getting well through one of the books I brought – Everything is Illuminated, by Jonathan Safron Foer. It is a very odd read, but it has been enjoyable so far.
I am looking very forward to every new day.
Did You Know?
The scorpionfish that we are catching are some of the most venomous creatures in the world (see Scorpaenidae) . These fish have spines that are coated with a venomous mucous, and their sting is incredibly painful – just ask CJ Duffie! These fish are also incredible masters of camouflage, changing in color and apparent texture to disguise themselves, so as to catch more prey.
Notable Species Seen
Fringed Sole (Gymnachirus texae)
Whelk (Busycotypus plagosus)
Whelk (Busycotypus plagosus)
Sea Star (Atropecten cingulatus)
Sea Star (Tethyaster grandis)
Gladiator Box Crab (Acanthocarpus alexanderi)
Yellow Box Crab (Calappa sulcata) — I injected this crab with formaldehyde to preserve the tissue. Once dry, I will give it a coat of polyurethane to preserve the shell.
Gulf Frog Crab (Raninoides louisianensis)
Calico Box Crab (Hepatus epheliticus) — I injected this crab with formaldehyde to preserve the tissue. Once dry, I will give it a coat of polyurethane to preserve the shell.
Lancer Stargazer (Kathetostoma albigutta) — In this photo, you can see the two large venomous spines located at the back of the head. Certain stargazers are “bioelectrogenic”, meaning that they are capable of generating an electricity to shock their prey.
Reticulate Goosefish (Lophiodes reticulatus) — In this photo, you can see that this fish contains a fishing apparatus (called an “illicium”) with a lure (called an “esca”) extending from its snout. It uses this apparatus to attract prey.
Spotted Batfish (Ogcocephalus pantostictus)
Slantbrow Batfish (Ogcocephalus declivirostris)
Pancake Batfish (Halieutichthys spp.)
Brown Rock Shrimp (Sicyonia brevirostris)
Humpback Shrimp (Solenocera vioscai)
Mexican Sea Robin (Prionotus paralatus)
Bigeye Sea Robin (Prionotus longispinosus)
Atlantic Bearded Brotula (Brotula barbata)
Bigeye (Priacanthus arenatus)
Atlantic Angel Shark (Squatina dumeril)
Sharksucker (Echeneis naucrates)
Sucking disc of a sharksucker (Echeneis naucrates), running from top of head to anterior part of body, used to attach to host
Sea Cucumber (Molpadia spp.)
Atlantic Thread Herring (Opisthonema oglinum)
Smooth Puffer (Lagocephalus laevigatus)
Sand Perch (Diplectrum formosum)
Blue Runner (Caranx crysos)
Smoothhead Scorpionfish (Scorpaena calcarata) — These fish have sharp spines coated with venomous mucus. One of the world’s most venomous species.
Atlantic Midshipman (Porichthys plectrodon) — This species uses photophores (light-emitting organs) to attract prey. They are named for these photophores, as these organs reminded observers of the buttons on naval uniforms.
Photophores on the Atlantic Midshipman (Porichthys plectrodon). These light-emitting organs are used to catch prey.
Northern Red Snapper (Lutjanus campechanus)
Lane Snapper (Lutjanus sunagris) — Also commonly called the “Candy Snapper”, due to the pink and yellow striping patter
NOAA Teacher at Sea David Walker Aboard NOAA Ship Oregon II June 24 – July 9, 2015
Mission: SEAMAP Bottomfish Survey Geographical Area of Cruise: Gulf of Mexico Date: Friday, June 26, 2015
Weather Data from the Bridge
NOAA Ship Oregon II Weather Log 6/26/15
Weather was quite calm on Days 1 and 2. As noted in the above weather log, the only real disturbance was a small squall (SQ) observed at 7 AM on Day 2. Sky conditions are estimated in terms of how many eighths of the sky are covered in cloud, ranging from 0 oktas (completely clear sky) through to 8 oktas (completely overcast). FEW in the above log represents 1-2 oktas of cloud coverage. SCT represents 3-4 octas, and BKN represents 5-7 oktas.
Science and Technology Log
I have been assigned the night watch, which runs from 12 midnight to 12 noon. Accordingly, on Day 1, I went to sleep around 2 PM and woke up around 10 PM to prepare for watch. My first day consisted mostly of general groundfish biodiversity survey work, one of the focuses during the summer being on shrimp species. Data collection points have been randomly plotted throughout the Gulf, and data is collected via trawling the seafloor, which consists of the boat pulling a fishing net behind the boat, along the seafloor, for a predetermined length of time. To allow for collection along the seafloor, the net has rollers on the bottom. The net also contains a “tickler chain” to stir up organisms (mainly shrimp) from the seafloor, so that they can be captured with the net. The trawl catch is transferred to the boat, where the following steps are completed:
CJ Duffie transferring a trawl catch to the boat.
1. The total catch is weighed.
2. The catch is run along a belt, and the three significant shrimp species (white, brown, and pink) are taken out and saved. In addition, multiple unbiased samples are taken from the catch and saved. The sample should contain at least one of each species encountered in the catch.
3. The entire taken sample is sorted by species.
4. Individuals within each species are counted.
5. Length, weight, and gender are recorded for shrimp individuals within a significant species (white, brown, and pink).
6. Length measurements are taken for all other species individuals within the sample. Weight and gender are recorded for one individual out of every five within a species, for species other than shrimp.
7. Everything is returned to the ocean.
Sorting the catch by species along the belt. Left to Right — Volunteer CJ Duffie, Equipment Specialist Warren Brown, me, and Research Fisheries Biologist Kevin Rademacher.
On Day 1, we completed the above process for 4 separate catches. Aside from my lack of knowledge, the only other mishap was that my middle finger accidentally got pinched by a fairly large Atlantic Blue Crab. I was amazed at the amount of force of the pinch, as well as the amount of pain caused. I ended up having to break the crab’s claw off in order to free myself.
Also on Day 1, I got to observe the CTD (Conductivity, Temperature, Depth) sensor in action. A CTD’s “primary function is to detect how the conductivity and temperature of the water column changes relative to depth” (NOAA). The salinity of the seawater can be determined from this conductivity and temperature data. On the Oregon II, the CTD also contains a dissolved oxygen sensor for measuring levels of dissolved oxygen in the seawater. In addition, the CTD is housed in a larger metal frame (called a “rosette”) with water bottles, allowing for sampling at various depths. Various data collection points have been randomly plotted throughout the gulf, and data collection consists of sending the CTD (+ dissolved oxygen sensor and water bottles) to and from the ocean floor. The photo at right shows the data output – the y-axis represents water depth, temperature is recorded in blue (two data points taken at each scan), salinity is recorded in red, and dissolved oxygen is recorded in green (2 data points taken at each scan). The ocean floor was at a very shallow depth (between 10 and 20 meters) for all sampling done on Day 1.
CTD data output
On Day 2, we completed more shrimp survey work and CTD sampling. I also got to participate in a plankton survey at the beginning of my shift. This entailed dropping two fine-mesh nets into the water – a dual-bongo and a neuston – and dragging them through the water to collect plankton. The dual-bongo is lowered to a predetermined depth, while the neuston remains at the surface. Obtained plankton is transferred to a jars with salt water and formaldehyde (for preservation) and sent to a lab in Poland (with which NOAA has a partnership) where it is categorized, measured, etc.
Personal Log
I have already met all of the scientific personnel and most of the other core and crew on the ship. Andre Debose is the Field Party Chief, and he heads up all scientific operations on the ship. The Executive Officer of the ship is Lieutenant Commander (LCDR) Eric Johnson, a NOAA Corps Officer. These are the two people who approve of all of my blog posts before I submit them to NOAA. The night watch (12 AM – 12 PM) consists of me, Kevin Rademacher, Warren Brown, and Alfonso Hamilton (watch leader). The day watch (12 PM – 12 AM) consists of Adam Catasus, Jeffrey Zingre, Joey Salisbury, and Michael Hendon (watch leader). CJ Duffie completes his watch from 6 AM to 6 PM. Adam, Jeffrey, and CJ are volunteer graduate students from Florida. This is their first NOAA research cruise, but they have already completed a two-week leg, so they know much more than I do. Alfonso, Kevin, Warren, Adam, and Joey are all seasoned NOAA veterans, have completed many years of research cruises, and have a wealth of knowledge.
My stateroom
My stateroom is quite nice. There is sufficient storage space for all of my clothing and equipment, such that I am able to keep most everything off of the floor. I am rooming with Joey Salisbury (I have top bunk), but as Joey is on the day shift, we do not see too much of each other. I am quite paranoid about not waking up on-time, so I tethered my cell phone to a pipe on the boat, directly above my head. This way, the phone alarm blares directly toward my face, and there is no danger of my phone falling off of the bunk.
I have not yet experienced any seasickness, although I am still taking preventative medication every day. Andre noted before we left that ginger helps with seasickness, so I brought some ginger ale and ginger cookies.
The food served on the ship is amazing, definitely much more than what I was expecting. There are multiple course options for each meal, and everything I have had so far has been exceptional. The highlight was the made-to-order omelet that I had for breakfast after 7 hours of sorting and measuring fish.
Notably, I also got to experience two boat safety drills on Day 1 – a fire drill, and an abandon ship drill. For the abandon ship drill, I got to try on my survival suit. It is made out of neoprene, so in that regard it reminds me of fly fishing waders. However it feels quite claustrophobic once you put your arms in it and zip it
halfway up your face. I needed much assistance in putting it on.
In my survival suit, during an abandon ship drill
Did You Know?
NOAA has a Commissioned Service, one of the seven Uniformed Services of the United States. The NOAA Corps consists only of Commissioned Officers (i.e. no enlisted personnel or Warrant Officers). The Corps first became a Commissioned Service in 1917, during World War I, as the United States Coast and Geodetic Survey Corps. In 1965, this Corps was renamed the Environmental Science Services Administration Commissioned Corps, and in 1970, was again renamed the NOAA Corps (Source — NOAA).
Notable Species Seen
Northern Brown Shrimp (Farfantepenaeus aztecus) — One of the three shrimp species monitored to benefit the commercial shrimping industry
Northern Pink Shrimp (Farfantepenaeus duorarum) — One of the three shrimp species monitored to benefit the commercial shrimping industry
Northern White Shrimp (Litopenaeus setiferus) — One of the three shrimp species monitored to benefit the commercial shrimping industry
