NOAA Teacher at Sea – Page 167 – NOAA Teacher at Sea Blog

September 13, 2015August 21, 2021

Jeff Miller: Sharks and Dead Zones, September 12, 2015

NOAA Teacher at Sea
Jeff Miller
Aboard NOAA Ship Oregon II
August 31 – September 14, 2015

Mission: Shark Longline Survey
Geographical Area: Gulf of Mexico
Date: September 12, 2015

Data from the Bridge
Ship Speed: 9.2 knots
Wind Speed: 8.8 knots
Air Temp: 27,7°C
Sea Temp: 30.2°C
Seas: 1-2 meters
Sea Depth: 457 meters

GPS Coordinates
Lat: 27 47.142 N
Long: 094 04.264 W

Science and Technology Log
On September 8 – 9, we surveyed a number of stations along the Texas and Louisiana coasts that were in shallow water between 10-30 meters (approximately 30-100 feet). Interestingly, the number of sharks we caught at each station varied dramatically. For example, we pulled up 65 sharks at station 136 and 53 sharks at station 137, whereas we caught only 5 sharks at station 138 and 2 sharks at station 139. What could account for this large variance in the number of sharks caught at these locations?

Weighing a bonnethead shark caught off the coast of Texas.

One key factor that is likely influencing shark distribution is the amount of dissolved oxygen in the water. Oxygen is required by living organisms to produce the energy needed to fuel all their activities. In water, dissolved oxygen levels above 5 mg/liter are needed for most marine organisms to thrive. Water with less than 2 mg/liter of dissolved oxygen is termed hypoxic, meaning dissolved oxygen is below levels needed by most organisms to thrive and survive. Water with less than 0.2 mg/liter of dissolved oxygen is termed anoxic (no oxygen) and results in “dead zones” where little, if any, marine life can survive.

As part of several missions, including the ground fish and longline shark surveys, NOAA ships sample the levels of dissolved oxygen at survey stations in coastal waters of the Gulf of Mexico. Measurements of dissolved oxygen, salinity, and temperature are collected by a device called the CTD. At each survey station, the CTD is deployed and it collects real-time measurements as it descends to the bottom and returns to the surface.

Standing with the CTD, which is used to measure dissolved oxygen, salinity, and temperature.

Data collected by the CTD is used to produce maps showing the relative levels of dissolved oxygen in coastal regions of the Gulf of Mexico. For more environmental data go to the NOAA National Centers for Environmental Information.

2015 Gulf Hypoxia Map — Map showing dissolved oxygen levels in the coastal areas of the Gulf of Mexico. Red marks anoxic/hypoxic areas with low dissolved oxygen levels. Source: NOAA National Centers for Environmental Information.

Environmental surveys demonstrate that large anoxic/hypoxic zones often exist along the Louisiana/Texas continental shelf. Because low dissolved oxygen levels are harmful to marine organisms, the anoxic/hypoxic zones in the northern Gulf of Mexico could greatly impact commercially and ecologically important marine species. Overwhelming scientific evidence indicates that excess organic matter, especially nitrogen, from the Mississippi River drainage basin drives the development of anoxic/hypoxic waters. Although natural sources contribute to the runoff, inputs from agricultural runoff, the burning of fossil fuels, and waste water treatment discharges have increased inputs to many times natural levels.

Runoff in the Mississippi basin — Map showing sources of nitrogen runoff in the Mississippi River drainage basin. Source NOAA National Centers for Coastal Ocean Science.

Nitrogen runoff from the Mississippi River feeds large phytoplankton algae blooms at the surface. Over time, excess algae and other organic materials sink to the bottom. On the bottom, decomposition of this organic material by bacteria and other organisms consumes oxygen and leads to formation of anoxic/hypoxic zones. These anoxic/hypoxic zones persist because waters of the northern Gulf of Mexico become stratified, which means the water is separated into horizontal layers with cold and/or saltier water at the bottom and warmer and/or fresher water at the surface. This layering separates bottom waters from the atmosphere and prevents re-supply of oxygen from the surface.

Since levels of dissolved oxygen can greatly influence the distribution of marine life, we reasoned that the high variation in the number of sharks caught along the Louisiana/Texas coast could be the result of differences in dissolved oxygen. To test this idea, we analyzed environmental data and shark numbers at survey stations along the Louisiana/Texas coast. The graphs below show raw data collected by the CTD at stations 137 and 138.

CTD 137 — Dissolved oxygen levels at station 137 (green line; raw data). At the surface: dissolved oxygen = 5.0 mg/liter. At the bottom: dissolved oxygen = 1.5 mg/liter. Notice the stratification of the water at a depth of 7-8 meters.

CTD 138 — Dissolved oxygen levels at station 138 (green line; raw data). At the surface: dissolved oxygen = 5.5 mg/liter. At the bottom: dissolved oxygen = 0 mg/liter. Notice the stratification of the water at a depth of 7-8 meters.

Putting together shark survey numbers with environmental data from the CTD we found that we caught very high numbers of sharks in hypoxic water and we caught very few sharks in anoxic water. Similar results were observed at station 136 (hypoxic waters; 65 sharks caught) and station 139 (anoxic waters; 2 sharks caught).

Data table — Relationship between dissolved oxygen levels and numbers of sharks caught at stations 137 and 138.

What can explain this data? One possible answer is that sharks will be found where there is food for them to eat. Thus, many sharks may be moving in and out of hypoxic waters to catch prey that may be stressed or less active due to low oxygen levels. In other words, sharks may be taking advantage of low oxygen conditions that make fish easier to catch. In contrast, anoxic waters cannot support marine life so there will be very little food for sharks to eat and, therefore, few sharks will be present. While this idea provides an explanation for our observations, more research, like the work being done aboard the NOAA Ship Oregon II, is needed to understand the distribution and movement of sharks in the Gulf of Mexico.

Personal Log
My time aboard the Oregon II is drawing to a close as we move into the last weekend of the cruise. We have now turned away from the Louisiana coast into deeper waters as we travel west to Galveston, Texas. The weather has changed as well. It has been sunny and hot for much of our trip, but clouds, rain, and wind have moved in. Despite this change in weather, we continue to set longlines at survey stations along our route to Galveston. The rain makes our job more challenging but our catch has been relatively light since we moved away from the coast into deeper waters. Hopefully our fishing luck will change as we move closer to Galveston. I would like to wrestle a few more sharks before my time on the Oregon II comes to an end.

September 11, 2015August 21, 2021

Rebecca Loy, DC means Damage Control! September 13, 2015

NOAA Teacher at Sea
Rebecca Loy
Aboard NOAA Ship Rainier
September 8 – 24 , 2015

Mission: Hydrographic Survey
Geographical area of Research: Kodiak Island, Alaska
Date: September 13, 2015

Current Location: transitioning between Shelikoff Strait and Uganik Bay, North Kodiak Island, Alaska

As I mentioned earlier, safety is top priority here on Rainier. The crew is required to have safety drills within 24 hours of leaving port. This includes drills such as Fire and Emergency drills, Man Over Board (MOB) drills and Abandon Ship drills.

When I arrived I was quickly told how to find 2 ways out of my cabin. My cabin also has a device called an EEBD – Emergency Escape Breathing Device that will allow me to breathe for 10 minutes in a smoky corridor if needed. Each and every cabin has these and they are also in various places around the ship.

All new crew and visitors are given a thorough safety briefing before we leave port. We started by doing some paperwork and discussing what everything means. Then, ENS Danial Palance took us around the ship and showed us the important areas. He made sure I could find my safe places to report to since I am so new to the ship.

Every person, including me, has a job during an emergency. Each person is given a “bunk card” that is held near your sleeping bunk. It lists the three main emergencies we practice and where each person reports to.

Fire and Emergency Drills – the ship’s whistle will blow for a long 10 second blast when there is a fire or other emergency. Go ahead and slowly count to 10 to see how long it is – 1 Mississippi, 2 Mississippi, 3…

This will definitely get your attention! If it is a drill it will be announced. If not, it will say this is an emergency. My job is to get to the “BRAVO station” which is on the Fantail or back of the ship near the boat shop. My primary duty is to “assist as directed” if help is needed. All over the ship are stations for the firefighters. What I find most interesting is these are not people they bring on board specifically… it is the crew you see around you who have also trained to be Firefighters and Advanced Firefighters! ENS Palance is one of them!

Also throughout the ship you can see Fire Stations and fire extinguishers, fire alarm boxes, radios for communication. Some of the areas with more dangerous items (like paint or the machine shop) are labeled “CO2 PROTECTED SPACE”. I was most curious about this. What do you think CO2 and fires have in common? If you answered that fires need oxygen to burn and CO2 will put a fire out then you are correct. In one area of the ship there are many large canisters with CO2 in them. If there is a bad fire in one of the CO2 protected spaces, someone can send the CO2 to that area and put the fire out. It will remove all the oxygen from the space.

Man Over Board drills – On a ship if someone falls into the water you will hear the whistle blow for 3 long blasts.

Along with many other orange safety rings, this one has smoke attached to it.

If you are the person who saw this, you will need to keep your eye on the person and let others know. Everyone has a station for this as well. My job is to report to the “Flying bridge” on top of the ship and be a lookout and help as needed. The ship has many orange safety rings that can be throw overboard to someone. There are also two rings with smoke signals attached that can be released from both port (left side) and starboard (right side) of the ship. We learned how to release those as well. Rainier has to do monthly drills for MOB. They don’t actually put someone in the water for this, it is usually a buoy or it could be “Oscar” the medical mannequin (He must be Rainier’s version of “Buster” from the show Mythbusters).

Abandon Ship drills – Being out on the cold waters of Alaska and leaving this ship is a scary thought, but it needs to be practiced. Everyone has their own Survival Suits to wear for these drills. Check me out with mine!! We also need to bring long sleeved shirts, warm hats and flotation devices with us. I will be reporting to Liferaft #4 on the port side of the ship with Liferaft #3 on the starboard side as back up. My indoor meeting place is in the Wardroom and, again, I assist as directed. If we have to leave the ship, people have jobs to go get the EPIRB which is an Emergency Position Indicating Radio Beacon, the SART is a Search and Rescue Transponder and the GMDSS which are Global Maritime Distress Safety Signal. All of these will help the Coast Guard rescue us!!

I have had my training, and you know what needs to be done. Now, time for the real drills at sea!!!

Suddenly, we hear a long 10 second whistle… it was the drill for fire and emergency. Everyone quickly went to their assigned areas. There was a fire near the mess hall and the fire team was on the job!! ENS McKay and AB Wright worked on putting the fire out. Below are some pictures of them in their fire gear!

ENS McKay practicing with the fire hoses.

AB Wright and ENS McKay practicing fighting the fire with all their gear on.

The fire drill turned into an Abandoned Ship drill. Calmly and quickly, everyone gathered their survival suits, a warm hat, long sleeved shirt and their PFD (personal floatation device) and went to their station. Everyone had to put their survival suits on. ENS McKay was my group leader and he had to help me with mine. He was incredibly fast putting his on and gave me some great pointers on being quicker in a real emergency.

Abandon ship drills when everyone puts on their survival suits! Photo Credit: Eli Smith

ENS McKay had his suit on and off very quickly, he then helped me with mine. Photo Credit: Eli Smith

While safety drills are important. I hope we will never have to do this for real!

Path to Rainier

This crew is truly an incredible bunch. I thought it would be interesting for others to see how people ended up working here. While I would like to highlight everyone, I could only pick a few.

The first person I want everyone to meet is Able Seaman (AB) Lindsey Houska. Lindsey is one of the deck hands on Rainier. I wanted to know what path led her to this unique work place.

With AB Lindsey Houska. Photo credit: Bob Steele

Lindsey started with a degree in Economics from South Dakota State University and worked in Montana for the USDA (U.S Department of Agriculture) for 4 1/2 years. She realized she wanted to get a bit more out of life than working at a desk. She sold her house and car, stored her belongings with her parents and went to Indonesia to volunteer instructing farmers on better growing practices. This was the beginning of her life adventures! After 3 months living in Indonesia and 5 months traveling other areas of Southeast Asia, she headed out to Australia. This incredibly hard working woman did a few jobs but ended up working on a commercial fishing vessel catching prawns on the West Coast of Australia. Later, she got a job in Seattle and South East Alaska as a deck hand on a luxury yacht. Realizing she had a love of positive environmental practices she wanted to do more for the world in general. This is when Lindsey applied to work for NOAA. NOAA are true stewards of the ocean!

On Rainier, Lindsey has been a very busy deck hand for nearly 2 years. She loves working with all the other deck hands and they have an amazing camaraderie with each other. I learned so much more about her job when we sat down together. Lindsey is a trained fire fighter, has been to radar school and even has her captain’s license for smaller vessels. She works hard with boat deployment, maintenance on the weather deck, inport bridge watch for security and anchor watch so the ship stays in place when it is at anchor. She also works the cranes, does lookout on the flying bridge and can be a helmsman steering the ship.

In her free time, Lindsey can be found reading, working out in the gym on board, meditating for some quiet time and she also has a bicycle on board that she likes to ride when the ship is in port. When I asked Lindsey what she did to reduce stress on the job, she said having a good sense of humor with colleagues goes a long way. They also enjoy time in port together and having meals together. This amazing woman has traveled all over the world including most of Southeast Asia, all over Australia and New Zealand. She has been to Europe, Mexico, British Columbia and Manitoba, Canada. Incredibly, but not surprising as I get to know her, many of the areas Lindsey backpacked to on her own!

I am truly impressed by this lady; how hard she works and how kind she has been to me. Thank you, Lindsey, for letting me get to know you better!

Personal Log

TEAMWORK SAFETY FIRST Three words that I have discovered run Rainier. I am incredibly impressed by the teamwork, communication, hard work and commitment to our oceans that is evident here. The umbrella over all of this is an even bigger obligation to safety. Above I have highlighted just a bit of what makes this ship work in regard to safety. In future blogs you will read more about this topic when you learn about the people here. Needless to say, even though we will be out in very big, deep waters and in narrow bays with tall mountains, I feel incredibly safe in the hands of this reliable crew.

Even getting fuel, this team is safe. Here a fuel boom went around the ship.

September 10, 2015August 21, 2021

Jeff Miller: Wrestling Sharks for Science, September 9, 2015

NOAA Teacher at Sea
Jeff Miller
Aboard NOAA Ship Oregon II
August 31 – September 14, 2015

Mission: Shark Longline Survey
Geographical Area: Gulf of Mexico
Date: September 9, 2015

Data from the Bridge
Ship Speed: 9.4 knots
Wind Speed: 6.75 knots
Air Temp: 29.4°C
Sea Temp: 30.4°C
Seas: <1 meter
Sea Depth: 13 meters

GPS Coordinates
Lat: N 29 25.103
Long: W 092.36.483

Science and Technology Log
The major goal of our mission is to survey shark populations in the western Gulf of Mexico and collect measurements and biological samples. The sharks are also tagged so if they are re-caught scientists can learn about their growth and movements.

Sharks are members of the class of fishes called Chondrichthyes,which are cartilaginous fishes meaning they have an internal skeleton made of cartilage. Within the class Chondricthyes, sharks belong to the subclass Elasmobranchii together with their closest relatives the skates and rays. There are about 450 species of living sharks that inhabit oceans around the world.

Sharks, or better put their ancient relatives, have inhabited the oceans for approximately 450 million years and have evolved a number of unique characteristics that help them survive and thrive in virtually all parts of the world. The most recognizable feature of sharks is their shape. A shark’s body shape and fin placement allow water to flow over the shark reducing drag and making swimming easier. In addition, the shark’s cartilaginous skeleton reduces weight while providing strength and flexibility, which also increases energy efficiency.

Blacktip shark — Measuring a blacktip shark on deck. The blacktip shark shows the typical body shape and fin placement of sharks. These physical characteristics decrease drag and help sharks move more efficiently through water.

When I held a shark for the first time, the feature I noticed most is the incredible muscle mass and strength of the shark. The body of a typical shark is composed of over 60% muscle (the average human has about 35-40% muscle mass). Most sharks need to keep swimming to breathe and, therefore, typically move steadily and slowly through the water. This slow, steady movement is powered by red muscle, which makes up about 10% of a sharks muscle and requires high amounts of oxygen to produce fuel for muscle contraction. The other 90% of a sharks muscle is called white muscle and is used for powerful bursts of speed when eluding predators (other sharks) or capturing prey.

Since sharks are so strong and potentially dangerous, one lesson that I learned quickly was how to properly handle a shark on deck. Smaller sharks can typically be handled by one person. To hold a small shark, you grab the shark just behind the chondrocranium (the stiff cartilage that makes up the “skull” of the shark) and above the gill slits. This is a relatively soft area that can be squeezed firmly with your hand to hold the shark. If the shark is a bit feisty, a second hand can be used to hold the tail.

Holding a sharpnose shark — Smaller sharks, like this sharpnose shark, can be held by firmly grabbing the shark just behind the head.

Larger and/or more aggressive sharks typically require two sets of hands to hold safely. When two people are needed to hold a shark, it is very important that both people grab the shark at the same time. One person holds the head while the other holds the tail. When trying to hold a larger, more powerful shark, you do not want to grab the tail first. Sharks are very flexible and can bend their heads back towards their tail, which can pose a safety risk for the handler. While holding a shark sounds simple, subduing a large shark and getting it to cooperate while taking measurements takes a lot of focus, strength, and teamwork.

Holding a blacktip shark — Teamwork is required to handle larger sharks like this blacktip shark, which was caught because it preyed on a small sharpnose shark that was already on the hook.

Measuring a blacktip shark — Collecting measurements from a large blacktip shark.

When a shark is too big to bring on deck safely, the shark is placed into a cradle and hoisted from the water so it can be measured and tagged. We have used the cradle on a number of sharks including a 7.5 foot tiger shark and a 6 foot scalloped hammerhead shark. When processing sharks, we try to work quickly and efficiently to measure and tag the sharks to minimize stress on the animals and time out of the water. Once our data collection is complete, the sharks are returned to the water.

Tiger shark in the cradle — Large sharks, like this tiger shark, are hoisted up on a cradle in order to be measured and tagged.

Personal Log
We are now in full work mode on the ship. My daily routine consists of waking up around 7:30 and grabbing breakfast. After breakfast I like to go check in on the night team to see what they caught and determine when they will do their next haul (i.e. pull in their catch). This usually gives me a couple hours of free time before my shift begins at noon. I like to use my time in the morning to work on my log and go through pictures from the previous day. I eat lunch around 11:30 so I am ready to start work at noon. My shift, which runs from noon to midnight, typically includes surveying three or four different stations. At each station, we set our baited hooks for one hour, haul the catch, and process the sharks and fishes. We process the sharks immediately and then release them, whereas we keep the fish to collect biological samples (otoliths and gonads). Once we finish processing the catch, we have free time until the ship reaches the next survey station. The stations can be anywhere from 6 or 7 miles apart to over 40 miles apart. Therefore, our downtime throughout the day can vary widely from 30 minutes to several hours (the ship usually travels at about 10 knots; 1 knot = 1.15 mph). At midnight, we switch roles with the night team. Working with fish in temperatures reaching the low 90°s will make you dirty. Therefore, I typically head to the shower to clean up before going to bed. I am usually in bed by 12:30 and will be back up early in the morning to do it all over again. It is a busy schedule, but the work is interesting, exciting, and fun. I feel very lucky to be out here because not many people get the opportunity to wrestle sharks. This is one experience I will always remember.

September 10, 2015August 21, 2021

Rebecca Loy, Land, Sea and Flexibility! September 9, 2015

NOAA Teacher at Sea
Rebecca Loy
Aboard NOAA Ship Rainier
September 8 – 24 , 2015

Mission: Hydrographic Survey
Geographical area of Research: Kodiak Island, Alaska
Date: September 9, 2015

Current Location: Women’s Harbor, U.S. Coast Guard Base, Kodiak, Alaska

Science Log

Kodiak, Alaska is amazing and NOAA Ship Rainier is even more so. When I arrived I learned that we were going to be in port for a few days. Instead of leaving on Tuesday, September 08, 2015 we are scheduled to leave on Saturday. Early in my planning and training I learned that FLEXIBILITY is very important and it has proven to be true.

NOAA TAS 2015 005 — *Rainier* with the rising sun behind it at Women’s Bay

During this time at port, the entire crew is very busy with ship activities. I thought this would be the perfect time to give some background on this amazing ship! Here is a link to more detailed information Rainier information flyer. An even more detailed, “let the geek out” link is Rainier special details.

Rainier is named after Mount Rainier in Washington State and was put to work in 1968. Do the math, how old is Rainier this year? Rainier is a long 231 foot ship. The breadth (width) is 42 feet and the draft, or how far down it sits in the water is 14 feet. One of the most interesting facts about this vessel is the ice strengthened hull. Rainier is one tough ship!!

To keep this unique ship running so well it has an incredible crew. I have learned that there are 7 main areas of work. I am only going to give a general overview so everyone can understand a little bit more about what happens here. I will go into more detail with future blogs.

Wardroom – This is what the NOAA uniformed officers are called. They can be seen wearing their blue uniforms. The hydrographic officers have a more interesting job than the officers on other NOAA vessels because they act not only as officers getting the ship where it needs to go safely, but they also work right alongside the survey scientists making tidal observations and coastal maps.

The Rainier Officers working in the Plotting Room — *Rainier* Officers working in the Plotting Room

It makes a lot of sense for the people who are researching and creating the very important coastal maps to understand them. There is no one better than the men and women who work with them every day!

Survey – These are the scientists who work with the officers to collect the data. Collecting the data is just the beginning. Once the data is collected they begin analyzing data and putting it to work. Similar to students who have classwork, they get assignments that need to be met and deadlines to get the work done. It can take weeks and months for the data to be put together to make the charts.

Engineering – The engineers are the inner working of the ship. They are the men and women who keep Rainier going strong! While here, there is a constant hum of mechanical parts (later the engines will be going and we will hear and feel those).

Just one of many areas the engineers work. This is an organized machine shop for repairs/fabricating.

Everywhere you look inside the ship you can see something that the engineers are responsible for maintaining. On my tour, I was amazed from top to bottom of the fans, gears, plumbing, wires, generators, motors, hydraulics, engines, heating/cooling, launch maintenance, refrigeration, distillers for water plus so much more that needs to be kept going. As you can see, this is also a very busy department!

Deck – While the engineers maintain the inside of the ship, the deck crew maintains the outside or what is called the “weather deck”. Here you will see the massive crane on the back of the ship and two smaller cranes at the front.

The large crane at the stern (back) of the ship.

They work the two large anchors and the “windlass” or winch to pull them up along with the smaller launches (boats) that are attached to the ship and the davits (hoists) to put them in and out of the water. The deck crew also make sure the ship is moored (tied up) properly plus so much more.

EET and ET – These are the two smallest departments, but they are needed to keep everyone working. The EET is the electronics engineering technician. He is an electrician that takes care of all the wiring throughout the ship. The Rainier EET has been here for over 20 years. The ET is the electronics technician and he builds, maintains and programs the computers and servers that are needed to run Rainier.

Steward – Have you heard the term “laughter is the best medicine?” Here on Rainier the food is the best medicine and what keeps this crew connected and happy!

The incredibly clean and efficient galley on the Rainier — The incredibly clean and efficient galley on *Rainier*

The galley (kitchen) is incredibly clean, organized and delicious! The selection of food has been healthy, varied and with just the right amount of sweet treats. They are up very early and work later to keep this crew fed. Every department has to come through here so they are the true backbone of the ship!

As I get to know the ship and crew more, I am continually amazed at the people here, how they communicate and work together and it all runs so smoothly. I am looking forward to our upcoming adventures doing research around Kodiak Island.

Personal Log

Being chosen for this experience is a great honor for me. I was here for only 24 hours and I had already seen so much of this beautiful area. I was fortunate enough to get here the night before Labor Day so the crew and I had the day off.

I walked around the harbor town of Kodiak and then went hiking to Abercrombie State Park. This now incredibly beautiful area of moss draped trees, cliffs and black rock/sand beaches was once a World War II gun site. I saw the massive guns, the lookout that was half buried in the rock and the searchlight shelter. Due to the northern site, there are times that the sun is not out for long so they had big searchlights that were rolled out of the structure to search for planes and ships out in the Pacific Ocean. While there I got to see the resident Bald Eagles and other wildlife (no Kodiak bears yet but I keep looking).

Draping moss on the trees that are now growing at Abercrombie.

The black sand/stone beach at Abercrombie.

The lookout tucked into the mountainside of Abercrombie State Park

Details about the search lights used. They were rolled out of a structure at night.

Later, I was able to head to the southern shore of Kodiak Island to see where people surf on Surfer Beach. Again, the sand is very dark and the waves were incredible. I didn’t think Alaska was an area for surfing, but it is very popular.

After looking at Surfer Beach I was taken over to the Pacific Spaceport Complex Alaska. I was able to let my Space Geek out. Too bad I didn’t have my Blue Flight Suit, I could have had my picture taken there. This is an active launch pad for launches over the Arctic. They had an explosion here in November, 2014 (no one was hurt thankfully) so it is being repaired before more launches can take place.

An interesting sign at the Pacific Spaceport Alaska.

On the ship, the crew is incredibly welcoming and helpful. I am gradually learning my way around and how things work. Off the ship, I used the time to connect with the local Kodiak High School and their award winning robotics team. They are doing some pretty amazing things here with STEAM in this small coastal town.

More adventures to follow as we head out and I become a true Teacher At Sea, not just a Teacher In Port!

September 7, 2015August 21, 2021

Jeff Miller: Fishing for Sharks and Fishes, September 6, 2015

NOAA Teacher at Sea
Jeff Miller
Aboard NOAA Ship Oregon II
August 31 – September 14, 2015

Mission: Shark Longline Survey
Geographical Area: Gulf of Mexico
Date: September 6, 2015

Data from the Bridge
Ship Speed: 9.7 knots
Wind Speed: 5.6 knots
Air Temp: 30.9°C
Sea Temp: 31.1°C
Seas: <1 meter
Sea Depth: 52 meters

GPS Coordinates
Lat: N 28 06.236
Long: W 095 15.023

Science and Technology Log
Our first couple days of fishing have been a great learning experience for me despite the fact that the fish count has been relatively low (the last three sets we averaged less than 5 fish per 100 hooks). There are a number of jobs to do at each survey station and I will rotate through each of them during my cruise. These jobs include baiting the hooks, numbering and setting the hooks on the main line, hauling in the hooks, measuring and weighing the sharks/fish, and processing the shark/fish for biological samples.

Numbering the baited hooks — Each gangion (the baited hook and its associate line) is tagged with a number before being attached to the main line.

Number clips — A number clip is attached to each gangion (baited hook and its associated line) to catalog each fish that is caught.

After the line is deployed for one hour, we haul in the catch. As the gangions come in, one of us will collect empty hooks and place them back in the barrel to be ready for the next station. Other members of the team will process the fish we catch. The number of fish caught at each station can vary widely. Our team (the daytime team) had two stations in a row where we caught fewer than five fish while the night team caught 57 fish at a single station.

Collecting empty hooks — Empty hooks are collected, left over bait is removed, and the gangion is placed back in the bucket to be ready for the next station.

So far we have caught a variety of fishes including golden tilefish, red snapper, sharpnose sharks, blacknose sharks, a scalloped hammerhead, black tip sharks, a spinner shark, and smooth dogfish. The first set of hooks we deployed was at a deep water station (sea depth was approx. 300 meters or 985 feet) and we hooked 11 golden tilefish, including one that weighed 13 kg (28.6 pounds).

We collect a number of samples from fishes such as red snapper and golden tilefish. First we collect otoliths, which are hard calcified structures of the inner ear that are located just behind the brain. Scientists can read the rings of the otolith to determine the approximate age and growth rate of the fish.

The answer to the poll is at the end of this post.

You can try to age fish like NOAA scientists do by using the Age Reading Demonstration created by the NOAA Alaska Fisheries Science Center. Click here to visit the site.

When sharks are caught, we collect information about their size, gender, and sexual maturity. You may be wondering, “how can you determine the sex of a shark?” It ends up that the answer is actually quite simple. Male sharks have two claspers along the inner margin of the pelvic fins that are used to insert sperm into the cloaca of a female. Female sharks lack claspers.

Male female shark — Male and female sharks can be distinguished by the presence of claspers on male sharks.

Personal Log
After arriving at our first survey station on Thursday afternoon (Sep. 3), everyone on the ship is in full work mode. We work around the clock in two groups: one team, which I belong to, works from noon to midnight, and the other team works from midnight to noon. The crew and science teams work very well together – everyone has a specific job as we set out hooks, haul the catch, and process the fishes. It’s a well oiled machine and I am grateful to the crew and my fellow science team members for helping me learn and take an active role the process. I am not here as a passive observer. I am truly part of the scientific team.

I have also learned a lot about the fishes we are catching. For example, I have learned how to handle them on deck, how to process them for samples, and how to filet them for dinner. I never fished much my life, so pretty much everything I am doing is new to me.

I have also adjusted well to life on the ship. Before the cruise, I was concerned that I may get seasick since I am prone to motion sickness. However, so far I have felt great even though we have been in relatively choppy seas (averaging about 1-2 meters or 3 to 6 feet) and the ship rocks constantly. I have been using a scopolamine patch, an anticholinergic drug that decreases nausea and dizziness, and this likely is playing a role. Whether it’s just me or the medicine, I feel good, I’m sleeping well, and I am eating well. The cooks are great and the food has been outstanding. All in all, I am having an amazing experience.

Poll answer: This fish is approximately nine years old (as determined by members of my science team aboard the Oregon II).