Lesley Urasky: Smile and say, “Squid!”, June 20, 2012

 NOAA Teacher at Sea
Lesley Urasky
Aboard the NOAA ship Pisces
June 16 – June 29, 2012

 Mission:  SEAMAP Caribbean Reef Fish Survey
Geographical area of cruise: St. Croix, U.S. Virgin Islands
Date: June 20, 2012

Location:
Latitude: 18.1937
Longitude: -64.7737

Weather Data from the Bridge:

Air Temperature: 28°C (83°F)
Wind Speed:  19 knots (22 mph), Beaufort scale: 5
Wind Direction: from N
Relative Humidity: 80%
Barometric Pressure: 1,014.90  mb
Surface Water Temperature: 28°C (83°F)

Science and Technology Log

The cameras are a very important aspect of the abundance survey the cruise is conducting.  Since catching fish is an iffy prospect (you may catch some, you may not) the cameras are extremely important in determining the abundance and variety of reef fish.  At every site sampled during daylight hours, we deploy the camera array.  The cameras can only be utilized during the daytime because there are no lights – video relies on the ambient light filtering down from the surface.

Camera array – the lens of one of the cameras is facing forward.

Deployment of the array at a site begins once the Bridge verifies we are over the sampling site. The camera array is turned on and is raised over the rail of the ship and lowered to the water’s surface on a line from a winch that has a ‘quick release’ attached to the array.  Once over the surface, a deck hand pulls on the line to the quick release allowing the array to free fall to the bottom of the ocean. Attached to the array is enough line with buoys attached. The buoys mark the array at the surface and give the deck hands something to aim for with the grappling hook when it is time for the array to be retrieved.  Once the buoys are on deck, a hydraulic pot hauler is used to raise the array from the sea floor to the side of the ship.  From there,  another winch is used to bring the array on board.

Vic, Jordan, Joey, and Joe deploying the camera array.

When the array is deployed, a scientist starts a computer program that collects the time, position and depth the array was dropped at. The array is allowed to “soak” on the bottom for about 38 minutes. The initial 3-5 minutes are for the cameras to power up and allow any sediment or debris on the bottom to settle after the array displaces it. The cameras are only actually recording for 25 of those minutes. The final 3-5 minutes are when the computers are powering down.  At one point in time, the cameras on the array were actual video cameras sealed in waterproof, seawater-rated cases. With this system, after each deployment, every individual case had to be physically removed from the array, opened up, and the DV tape switched out.  With the new system, there are a series of four digital cameras that communicate wirelessly with the computers inside the dry lab.

We did have a short-lived problem with one of the digital cameras — it quit working and the electronics technician that takes care of the cameras, Kenny Wilkinson, took a couple of nights to trouble shoot and repair it.  During this time period, we reverted back to the original standard video camera.  Throughout the cruise, Kenny uploads the videos taken during the day and repairs the cameras at night so they will be ready for the next day’s deployments.

Squid (before being cut into pieces) used for bait on the camera array

Besides the structure of the camera array which is designed to attract reef fish, the array is baited with squid.  A bag of frozen, cut squid hangs down near the middle.  The squid is replaced at every site.

Adding bait to the camera array.

In addition to the bait bag, a Temperature Depth  Recorder (TDR) is attached near the center, hanging downward near the bottom third of the array. The purpose of the TDR is to measure the temperature of the water at various depths.  It is also used to verify that the depth where the camera comes to rest on the ocean bottom and is roughly equivalent to what the acoustic sounding reports at the site.  This is important because the camera generally doesn’t settle directly beneath the ship.  Its location is ultimately determined by the drift as it falls through the water column and current.  The actual TDR instrument is very small and is attached to the array near the bait bag.  After retrieving the array at each site, the TDR is removed from the array and brought inside to download the information.  To download, there is a small magnet that is used to tap the instrument (once) and then a stylus attached to the computer is used to read a flash of light emitted by an LED.  The magnet is then tapped four times on the instrument to clear the previous run’s data.  The data actually records the pressure exerted by the overlying water column in pounds per square inch (psi) which is then converted to a depth.

TDR instrument
Computer screen showing the data downloaded from the TDR.

The video from each day is uploaded to the computer system during the night shift.  The following day, Kevin Rademacher (chief scientist), views the videos and quickly annotates the “highlights”.  The following things are noted:  visual clarity (turbidity [cloudiness due to suspended materials], what the lighting is like [backlit], and possible focusing issues), substrate (what the bottom is made of), commercially viable fish, fish with specific management plans, presence of lionfish (an invasive species), and fish behavior.  Of the four cameras, the one with the best available image is noted for later viewing.

Computer data entry form for camera array image logs

Once back at the lab, the videos are more completely analyzed.  A typical 20-minute video will take anywhere from 30 minutes to three days to complete. This is highly dependent upon density and diversity of fish species seen; the greater the density and diversity, the longer or more viewing events it will take.  The experience of the reader is also an important factor. Depending upon the level of expertise, a review system is in place to “back read” or verify species identification. The resulting data is entered into a database which is then used to assign yearly data points for trend analysis. The final database is submitted to the various management councils.  From there, management or fisheries rebuilding plans are developed and hopefully, implemented.

Spotted moray eel viewed from the camera array.  He’s well camouflaged; can you find him?
Coney with a parasitic isopod attached below its eye.
Two Lionfish – an invasive species

Personal Log

Today, we are off the coast of St. Thomas and St. John in the U.S. Virgin Islands.  We traveled from the southern coast of  St. Croix, went around the western tip of the island and across the straight.  When I woke up I could see not only St. Thomas and St. John, but a host of smaller islands located off their coastline.

Map of the Virgin Islands. St. Croix and St. Thomas are separated by 35 miles of ocean. It took us about 3 hours to cross to our next set of sampling sites.

Around dinner time last night we had an interesting event happen on board.  They announced over the radio system that there was a leak in the water line and asked  us not to use the heads (toilets).  A while later, they announced no unnecessary use of water (showers, etc.); following that they shut off all water.  It didn’t take long for the repairs to occur, and soon the water was returned.  However, when I went to dinner, I discovered that the stateroom I’m sharing with Kelly Schill, the Ops Officer, had flooded.  Fortunately, the effects of the flooding were not nearly as bad as I had feared.  Only a small portion of the room had been affected.  The crew did a great job of rapidly assessing the problem and fixing it in a timely manner.  After this, I have absolutely no fear about any problems on board because I know the crew will react swiftly, maintain safety, and be professional all the while.

Last night was the first sunset I’ve seen since I’ve been on board.  Up until this point, it has been too hazy and cloudy.  The current haze is caused by dust/sand storms in the Sahara Desert blowing minute particles across the Atlantic Ocean.

St. Thomas sunset

Today has been a slow day with almost nary a fish caught.  We did catch one fish, but by default.  It was near the surface and hooked onto our bait.  We immediately reeled in the line and extracted it.  It was necessary to remove it because it would have skewed our data since it was caught at the surface and not near the reef.  This fish was a really exciting one for me to see, because it was a Shark Sucker (Echeneis naucrates).  These are the fish you may have seen that hang on to sharks waiting for tasty tidbits to float by.  They are always on the lookout for a free meal.

Shark sucker on measuring board

One of the most interesting aspects of the shark sucker is that they have a suction device called laminae on top of their heads that looks a little like a grooved Venetian blind system.  In order to attach to the shark (or other organism), they “open the blinds” and then close them creating a suction-like connection.

The “sucker” structure on the Shark Sucker. Don’t they look like Venetian blinds?

I got to not only see and feel this structure on the fish, but also let it attach itself to my arm!  It was the neatest feeling ever! The laminae are actually a modified dorsal spines; these spines are needed because of the roughness of shark’s skin. When the shark sucker detached itself from me, it left a red, slightly irritated mark on my arm that disappeared after a couple of hours.

Look, Ma, No Hands! Shark sucker attached to my arm.

Tomorrow we’ll be helping place a buoy in between St. Croix and St. Thomas.  It will be interesting to see the process and how the anchor is attached.

With all the weird and wonderful animals we’re retrieving, I can’t wait to see what another day of fishing brings.

Valerie Bogan: The Adventure Continues: June 12, 2012

NOAA Teacher at Sea
Valerie Bogan
Aboard NOAA ship Oregon II
June 7 – 20, 2012

Mission: Southeast Fisheries Science Center Summer Groundfish (SEAMAP) Survey
Geographical area of cruise: Gulf of Mexico
Date
: Tuesday June 12, 2012

Weather Data from the Bridge:
Sea temperature 28  degrees celsius, Air temperature 26.4 degrees celsius, building seas.

Science and Technology Log

Today I want to discuss the neuston net.  This is a very large net made out of finely woven mesh which is deployed (shoved off the side of the boat) in order to catch plankton.  There are three types of plankton: phytoplankton (plants and algae),  zooplankton (animals), and ichytoplankton (baby fish).  The neuston net rides along the surface of the water for ten minutes scooping up any organisms which are near the surface.  After the ten minutes are up, the deck crew uses a crane to pull the net out of the water and bring it up to the point where someone can wash it down with a hose.  This is necessary because not all of the plankton ends up in the cod end (the place where the collection jar is located) so we have to use a hose to get all of the loose stuff washed into the end of the net.  After the net is washed down, the cod end is carefully removed, placed in a bucket and taken to the stern (back) of the ship where it is processed.

Putting out the neuston net
This is how the neuston net is moved from the ship into the water. From left to right Jeff, Marshall, and Chris are safely deploying the net.

To process the sample you must first empty the contents of the cod end into a filter which will allow the water to run out but will keep the sample.  Then you transfer (move) the sample from the filter into a glass sample jar.  Sometimes the sample smoothly slides into the jar and other times you have to wash down the filter with some ethanol.  Once all of the sample is in the jar it is topped off with ethanol, a tag is placed inside the jar, and another tag is put on top of the jar.  This sample is stored on the boat and taken back to the NOAA lab where it will be cataloged.

Processing the neuston sample
In this picture I am filtering out the water from the neuston sample so it can be placed in a sample jar.(Picture by Francis)

Personal Log

Today is our fifth day at sea and I’m feeling fairly comfortable with my duties on the ship.  I was assigned to the night watch which runs from midnight till noon the next day.  I’ll admit I didn’t make it the entire time the first day. We got done early and despite my intentions to stay up until my shift, I would have ended I falling asleep.  The second night was better. I was beyond exhausted at the end, but I did manage to make it through the entire shift.  At this point my mind and body have adjusted to the shift and I can easily drift to sleep at 3 pm and get up at 11:15 pm.  Students, this is a great example of what it means to be responsible.  If I was given the choice, do you think I would have chosen these crazy hours or to work twelve hours straight?  No of course not but I really wanted to come on this expedition and this work assignment is part of the trip.  So I’m doing the same thing I would expect you to do in a situation like this: accept it and get the work done.

Now I don’t want you to think that the trip is just about hard work. It’s also about seeing new places and getting to know some interesting people.  I started out this trip in Pascagoula Mississippi, a city and state I never planned on visiting before this assignment.  However, the people there were so helpful and friendly that I would gladly go back to see more of this region.  All of you from the Kokomo area know that the major employers are automobile companies. Well, Pascagoula also has a major industry: ship building.  So despite the distance between Kokomo and Pascagoula–about 900 miles–each town depends on an industry for their survival and both towns are incredibly proud of their contribution to society.

Ship yards in Pascagoula
The major industry in Pascagoula is ship building.

I have been introducing you to parts of the ship, and today I’m going to tell you about the bridge.  Now this is not the type of bridge that crosses a river, but rather the command center of the ship.  The crew on the bridge is responsible for the safety of all personal on board and for the ship itself.  There is a vast array of technology on the bridge which the crew uses to plot our course, check the weather, and to do hundreds of other things which are necessary for the ship to function.

Navigation chart
This is the chart the bridge crew uses to plot our course.

Carmen Andrews: Introduction June 20, 2012

NOAA Teacher at Sea
Carmen Andrews
Aboard R/V Savannah
July 6 – 18, 2012

Carmen Andrews
Carmen Andrews

Hello! 

Happy Summer Solstice Day! I am Carmen Andrews.  I work as a science specialist at  Six to Six Interdistrict Magnet School in Bridgeport, CT.  I have just finished my 5th year at this school.  I create science curriculum for grades pre-K through 8. I also teach many classes to help teachers improve their understanding of science concepts and inquiry methods.

Six to Six Magnet School
Six to Six Interdistrict Magnet School, Bridgeport, CT

Our school has a unique academic program that incorporates partnerships with the Maritime Aquarium in Norwalk, CT and the Eli Whitney Museum in Hamden, CT.  Our students visit many other places, including the Yale Peabody Museum and Yale Leitner Family Planetarium and Observatory in New Haven. We also allow our students to remotely operate the Gold Apple Valley Radio Telescope in California. My favorite places to teach classes are the unspoiled outdoor sites in Connecticut where we take our students for field studies.

4th Grade Marsh Field Study
4th Graders on a Marsh Field Study
Kindergarteners Investigating Invertebrates
Kindergarteners Investigating Marine Invertebrates
Sixth Graders
6th Graders Counting Intertidal Organisms Using a Quadrat

I love research!

One of my passions as an educator is creating opportunities for students to investigate real world problems using science inquiry. This year my 6th and 7th graders took on a big environmental research project. They were asked to research bioremediation and to develop a creative solution to a major problem in their community  — toxic oil spills. The work was funded by a NSTA/Toyota Tapestry Grant award, which enabled us to find out about blue and gray oyster mushrooms’ ability to metabolize oil spills in soil. Our project is called Going Green in Brownfields: A New Diet for Mushrooms. You can see our blog here: mushroomdiet.info 

Mushroom Harvest
A 7th Grader Massing Blue Oyster Mushrooms Grown in Motor Oil

My Teacher at Sea Adventure

The NOAA Teacher at Sea program was created to provide teachers with experiences in science research. We share our knowledge with our school communities using blogs, teaching and writing articles when we return from our Teacher at Sea assignment. I am very excited to learn about the work of NOAA in monitoring fisheries in U.S. coastal waters. I am eager to share this  scientific research with students. I also want to expose students to the variety of maritime and marine science careers that they can consider pursuing in later life.

I will be departing on the R/V Savannah in about 2 weeks to participate in a reef fish survey.  The next time I write, I will most likely be somewhere near Skidaway Island, GA.  My target audience for my blogs while I am at sea, are students, colleagues and friends of all ages. Please feel free to post your comments and questions about this important science research.

Nicolle von der Heyde, June 21, 2010

NOAA Teacher at Sea
Nicolle Vonderheyde
Onboard NOAA Ship Pisces
June 14 – July 2, 2010

Nicolle von der Heyde
NOAA Ship Pisces
Mission: SEAMAP Reef Fish Survey
Geographical Area of Cruise: Gulf of Mexico
Dates: Monday, June 21

Weather Data from the Bridge

Time: 0800 hours (8 am)
Position: Latitude: 28º 09.6 minutes N
Longitude: 094º 18.2 min. W
Visibility: 10 nautical miles
Wind Direction: variable
Water Temperature: 30.6 degrees Celsius
Air Temperature: 27.5 degrees Celsius
Ship’s Speed: 5 knots

Science Technology Log

Atlantic Spotted dolphins are the graceful ballerinas of the sea. They are just incredible! The Gulf of Mexico is one of the habitats of the dolphin because they live in warm tropical waters. The body of a spotted dolphin is covered with spots and as they get older their spots become greater in number.

Atlantic Spotted Dolphins
Atlantic Spotted Dolphins
Atlantic Spotted Dolphins
Atlantic Spotted Dolphins
Atlantic Spotted Dolphin
Atlantic Spotted Dolphin

Here you can see the spots on an older Atlantic Spotted Dolphin. To read more about dolphins go to http://www.dolphindreamteam.com/dolphins/dolphins.html

Because Dolphins are mammals they breathe air through a single blowhole much like whales. Dolphins live together in pods and can grow to be 8 feet long and weigh 200-255 pounds. Like whales, dolphins swim by moving their tails (flukes) up and down. The dolphin’s beak is long and slim and its lips and the tip of its beak are white. They eat a variety of fish and squid found at the surface of the water. Since dolphins like to swim with yellow fin tuna, some dolphins die by getting tangled in the nets of tuna fishermen.

Newborn calves are grey with white bellies. They do not have spots. Calves mature around the age of 6-8 years or when the dolphin reaches a length of 6.5 feet. Calving takes place every two years. Gestation (or pregnancy) lasts for 11 1/2 months and babies are nursed for 11 months.

While watching the dolphins ride the bow wave, Nicolle and I wondered, “How do dolphins sleep and not drown?” Actually, we found that there are two basic methods of sleeping: they float and rest vertically or horizontally at the surface of the water. The other method is sleeping while swimming slowly next to another dolphin. Dolphins shut down half of their brains and close the opposite eye. That lets the other half of the brain stay “awake.” This way they can rest and also watch for predators. After two hours they reverse this process. This pattern of sleep is called “cat-napping.”

Dolphins maintain a deeper sleep at night and usually only sleep for two hours at a time. This method is called “logging” because in this state dolphins look like a log floating in the ocean.

The 1972 Marine Mammal Protection Act (MMPA) prohibits the hunting, capturing, killing or collecting of marine mammals without a proper permit. Permits are granted for the Spotted Dolphins to be taken if it is for scientific research, public display, conservation, or in the case of a dolphin stranding. The maximum ffor violating the MMPA is $20,000 and one year in jail.

Atlantic Spotted Dolphin
Atlantic Spotted Dolphin

Personal Log

The best part of this trip is all the marine life I see in the Gulf. In the past few days, dolphins have been swimming up to the boat and riding the bow wave of the ship. They are so graceful and playful in the water. In addition to the Tiger Shark seen feasting on the dead Sperm Whale, I have seen quite a few sharks swimming in the water near our ship. One, called a Silky Shark, took the bait as some of the crew was fishing from the stern of the boat (shown to the left). It was hauled up so the hook could be taken out and released back into the water. The second was a baby shark swimming near the bow of the ship as I watched the dolphins in the distance. I also saw a shark swimming near the starboard side of our ship while the deckhands were hauling up one of the camera arrays.

The fourth shark was the most exciting. As the crew was working at the stern of the ship to release a line that was caught in the rudder, I looked over the stern to see a large shark very near the surface swimming toward the starboard (right) side of the ship. I hurried to look and to my surprise it was a giant Hammerhead! I never expected to see one of these in its natural habitat. Unfortunately, by the time I got my camera out, the Hammerhead was too far away and too deep to get a clear shot, but what a sight to see!

Hammerhead shark
Hammerhead shark
The photo on the right is from Monterey Bay Aquarium. For more information, go to http://www.montereybayaquarium.org/animals/AnimalDetails.aspx?enc=C53nR+hhcrXgfKW+bt/MWA==
The photo on the right is from Monterey Bay Aquarium. For more information, go to http://www.montereybayaquarium.org/animals/AnimalDetails.aspx?enc=C53nR+hhcrXgfKW+bt/MWA==

The photo on the right is from Monterey Bay Aquarium. For more information, go to http://www.montereybayaquarium.org/animals/AnimalDetails.aspx?enc=C53nR+hhcrXgfKW+bt/MWA==

I often mistake the fish shown on the left for sharks. Actually they are Cobia, also known as Lemonfish. Once in a while thefish approach the boat as we are hauling fishup on the bandit reel. I have also seen bojellyfish in the water as we are working on the starboard side of the ship and I spotted a brief glimpse of an Ocean Sunfish (Mola mola) from the bridge of the ship as I was talking to our Commanding Officer (CO). I wish I could have seen this fish up close. They are the largest bony fish in the oceans and as someone on the ship described, they resemble a giant Chiclet swimming in the water.

The smallest living things I have seen while at sea are the tiny creatures that live in the Sargassum, a type of seaweed that floats freely within and on the surface of the Gulf waters. The Sargassum provides a habitat for tiny creatures that are the foundation of the food web, even providing food for some of the largest animals in the sea like whales. The picture below on the left shows a giant patch of Sargassum, while the picture on the right shows some of the creatures that live within it including tiny shrimp, krill, and very small crabs.

Sargassum
Sargassum
Creatures that live within the sargassum including tiny shrimp, krill, and very small crabs
Creatures that live within the sargassum including tiny shrimp, krill, and very small crabs

Seeing all this life has been reassuring as the oil continues to gush into Gulf waters off the coast of Louisiana, however I can’t help but think what the overall impact of this spill will be for the future of the Gulf. Will we see the negative environmental impact spread to the Eastern Gulf? Are microscopic droplets of oil and chemical dispersants infecting the food chain beyond the area that we visibly see being impacted? These questions will be answered as NOAA scientists continue to collect and analyze the type of data that I am helping gather on this SEAMAP Reef Fish Survey. I feel so fortunate to be a part of this scientific endeavor.

Animals Seen

Silky Shark (Carcharhinus falciformis)

Hammerhead (Sphyrna mokarran)

Cobia (Rachycentron canadum)

Ocean Sunfish (Mola mola)

Krill, Shrimp, Crab (species unidentified)

Lesley Urasky: Fish, fish, where are all the fish? June 18, 2012

 NOAA Teacher at Sea
Lesley Urasky
Aboard the NOAA ship Pisces
June 16 – June 29, 2012

 

Mission:  SEAMAP Caribbean Reef Fish Survey
Geographical area of cruise: St. Croix, U.S. Virgin Islands
Date: June 18, 2012

Location:
Latitude: 17.6568
Longitude: -64.9281

Weather Data from the Bridge:

Air Temperature: 28.5°C (83.3°F)
Wind Speed:  17.1 knots (19.7 mph), Beaufort scale: 5
Wind Direction: from SE
Relative Humidity: 75%
Barometric Pressure:   1,014.80 mb
Surface Water Temperature:28.97 °C (84.1°F)

Science and Technology Log

Alright, so I’ve promised to talk about the fish.  Throughout the science portions of the cruise, the scientists have not been catching the anticipated quantities of fish.  There are several lines of thought as to why: maybe the region has experienced overfishing; possibly the sampling sites are too shallow and deeper water fish may be more likely to bite; or they might not like the bait (North Atlantic mackerel) since it is not an endemic species/prey they would normally eat.

So far, the night shift has caught more fish than the day shift that I’m on.  Today, we have caught five and a half fish. The half fish was exactly that – we retrieved only the head and it looked like the rest of the body had been consumed by a barracuda!  These fish were in the grouper family and the snapper family.

Coney (Cephalopholis fulvus)
Blackfin snapper (Lutjanus buccanella). This little guy was wily enough to sneak into the camera array and steal some squid out of the bait bag! The contents of his stomach – cut up squid – can be seen to the left between the forceps and his head.

Once the fish have been caught, there are several measurements that must be made.  To begin, the fish is weighed to the nearest thousandth (three decimal places) of a kilogram. In order to make sure the weight of the fish is accurate, the scale must be periodically calibrated.

Then there are several length measurements that are made: standard length (SL), total length (TL) and depending on the type of fish, fork length (FL).  To make these measurements, the fish is laid so that it facing toward the left and placed on a fish board.  The board is simply a long plank with a tape measure running down the center.  It insures that the fish is laid out flat and allows for consistent measurement.

Standard length does not measure the caudal fin, or tail.  It is measured from the tip of the fish’s head and stops at the end of the last vertebra; in other words, if the fish is laying on its side, and you were to lift the tail up slightly, a crease will form at the base of the backbone.  This is where the standard length measurement would end.  Total length is just as it sounds – it is a measurement of the entire length (straight line)  of the fish.  Fork length is only measured if the type of fish caught has a forked tail.  If it does, the measurement begins at the fish’s snout and ends at the v-notch in the tail.

How to measure the three types of lengths: standard, fork, and total. (Source: Australian Government: Department of Sustainability, Environment, Water, Population, and Communities)
Red hind (Epinephelus guttatus) on the fish board being measured for standard length. Ariane’s thumb is on the crease marking the end of its backbone.

Once the physical measurements are made, the otoliths must be extracted and the fish sexed.  You’re probably anxious to learn if you selected the right answer on the previous post’s poll – “What do you think an otolith is?”  An otolith can be thought of as a fish’s “ear bone”.  It is actually a structure composed of calcium carbonate and located within the inner ear.  All vertebrates (organisms with backbones) have similar structures.  They function as gravity, balance, movement, and directional indicators.  Their presence helps a fish sense changes in horizontal motion and acceleration.

In order to extract the otoliths, the fish must be killed.  Once the fish has been killed, the brain case is exposed and peeled back.  The otoliths are in little slits located in the underside of the brain.  It takes a delicate touch to remove them with a pair of forceps (tweezers) because they can easily break or slip beyond the “point of no return” (drop into the brain cavity where they cannot be extracted).

Otoliths are important scientifically because they can tell many important things about a fish’s life.  Their age and growth throughout the first year of life can be determined.  Otoliths record this information just like tree ring record summer/winter cycles. More complex measurements can be used to determine the date of hatch, once there are a collected series of measurements, spawning times can be calculated.

A cross-section of an otolith under a microscope. The rings are used to determine age and other life events. Source: Otolith Research Laboratory, Bedford Institute of Oceanography, Dartmouth, Nova Scotia, Canada.

Because they are composed of calcium carbonate (CaCO3), the oxygen component of the chemical compound can be used to measure stable oxygen isotopes; this is useful for reconstructing temperatures of the waters the fish has lived in.  Scientists are also able to look at other trace elements and isotopes to determine various environmental factors.

Extracted otoliths. Often they are around 1 cm long, although the larger the fish, the slightly larger the otolith.

The final step we take in measurement/data collection is determining the sex and maturity of the fish.  To do this, the fish is slit open just as if you were going to clean the fish to filet and eat it.  The air bladder must be deflated if it isn’t already and the intestines moved out of the way.  Then we begin to search for the gonads (ovaries and testes).  Once the gonads are found, we know if it is female or male and the next step is to determine its stage or maturity.  This is quite a process, especially since groupers can be hermaphroditic.  The maturity can be classified with a series of codes:

  • U = undetermined
  •  1  = immature virgin (gonads are barely visible)
  •  2  = resting (empty gonads – in between reproductive events)
  •  3 = enlarging/developing (eggs/sperm are beginning to be produced)
  •  4 = running ripe (gonads are full of eggs/sperm and are ready to spawn)
  •  5 = spent (spawning has already occurred)
Ovaries of a coney (grouper family). These are the pair of flesh colored tubular structures running down the center of the fish.

Personal Log

Today is my birthday, and I can’t think of a better place to spend it!  What a treat to be having such an adventure in the Caribbean!  This morning, we were on our first bandit reel survey of the day, and the captain came on over the radio system, announced my birthday and sang Happy Birthday to me.  Unbeknownst to me, my husband, Dave, had emailed the CO of the Pisces asking him to wish me a happy birthday.

We’ve had a very successful day (compared to the past two days) and have caught many more fish – 5 1/2 to be exact.  The most exciting part was that I caught two fish on my bandit reel!  They were a red hind and blackfin snapper (see the photos above).  What a great birthday present!

Father’s Day surf and turf dinner
My birthday fish! The blackfin snapper is on the left and the red hind on the right.
I even got a birthday kiss from the red hind!

Last night (6/17) for Father’s Day, we had an amazing dinner: filet mignon, lobster, asparagus, sweet plantains, and sweet potato pie for dessert!  Since it was my birthday the following day (6/18), and one of the scientists doesn’t like lobster, I had two tails!  What a treat!

Our best catch of the day came on the last bandit reel cast.  Joey Salisbury (one of the scientists) caught 5 fish: 4 blackfin snapper and 1 almaco jack; while Ariane Frappier (another scientist) caught 3 – 2 blackfin and 1 almaco jack.  This happened right before dinner, so we developed a pretty good assembly line system to work them up in time to eat.

Dinner was a nice Chinese meal, but between the ship beginning to travel to the South coast of St. Thomas and working on the computer, I began to feel a touch seasick (not the best feeling after a large meal!).  I took a couple of meclazine (motion sickness medication) and still felt unwell (most likely because you’re supposed to take it before the motion begins). My roommate, Kelly Schill, the Operations Officer, made me go to bed (I’m in the top bunk – yikes!), gave me a plastic bag (just in case!), and some saltine crackers. After 10 hours of sleep, I felt much, much better!

I had some time in between running bandit reels, baiting the hooks, and entering data into the computers,to interview a member of the science team that joined us at the  last-minute from St. Croix.  Roy Pemberton, Jr. is the Director of Fish and Wildlife for the Department of Planning and Natural Resources of the U.S. Virgin Islands. The following is a snippet of our conversation:

LU: What are your job duties as the Director of Fish and Wildlife?

RP: I manage fisheries/wildlife resources and try to educate the population on how to better manage these resources to preserve them for future generations of the U.S. Virgin Islands.

LU: When did you first become interested in oceanography?

RP: I’m not really an oceanographer, but more of a marine scientist and wildlife biologist.  I got interested in this around 5-6 years old when I learned to swim and then snorkel for the first time.  I really enjoyed observing the marine environment and my interest prompted me to want to see and learn more about it.

LU: It’s such a broad field, how did you narrow your focus down to what you’re currently doing?

RP: I took a marine science class in high school and I enjoyed it tremendously.  It made me seek it out as a career by pursuing a degree in Marine Science at Hampton University.

LU:  If you were to go into another area of ocean research, what would it be?

RP: Oceanography – Marine Spatial Planning

Roy Pemberton holding a recently caught coney.

LU: What is the biggest challenge in your job?

RP: It is a challenge to manage fisheries and wildlife resources with respect to the socioeconomic and cultural nuances of the people.

LU: What do you think is the biggest issue of contention in your field, and how do you imagine it will resolve?

RP: Fisheries and coral reef management.  We need to have enough time to see if the federal management efforts work to ensure healthier ecosystems for future generations.

LU: What are some effects of climate change that you’ve witnessed in the reef systems of the U.S. Virgin Islands?

RP: Temperatures have become warmer and the prevalence of disease among corals has increased.

LU: In what areas of Marine Science do you foresee a lot of a career paths and job opportunities?

RP: Fisheries management, ecosystem management, coral reef diseases, and the study of coral reef restoration.

LU: Is there an area of Marine Science that you think is currently being overlooked, and why?

RP: Marine Science management that takes into account cultural and economic issues.

LU: What are some ideas a layperson could take from your work?

RP: One tries to balance resource protection and management with the cultural and heritage needs of the population in the territory of the U.S. Virgin Islands.

LU: If a high school student wanted to go into the fish/wildlife division of planning and natural resources, what kinds of courses would you recommend they take?

RP: Biology, Marine Science, History, Botany, and Math

LU: Do you recommend students interested in your field pursue original research as high school students or undergraduate students?  If so, what kind?

RP: I would suggest they study a variety of life sciences so they can see what they want to pursue.  Then they can do an internship in a particular life science they find interesting to determine if they would like to pursue it as a career.

Too many interesting people on the ship and so little time!  I’m going to interview scientists as we continue on to San Juan, Puerto Rico. Once they leave, I’m continuing on to Mayport, Florida with the ship.  During this time, I’ll explore other careers with NOAA.