NOAA Teacher at Sea
Elaine Bechler
Aboard R/V Fulmar
July 21 – 26, 2011
Mission: Survey of Cordell Bank and Gulf of the Farallones NMS Geographical Area of Cruise: Pacific Ocean, Off the California Coast Date: July 23, 2011
Science and Technology Log
Today was day three of my Teacher at Sea experience aboard the R/V Fulmar. It is a big eye-opener to have experienced this. We have been documenting all birds, marine mammals and debris while we travel along transects through the Gulf of the Farallones NMS (National Marine Sanctuary) and Cordell Bank NMS.
Transects in the study area
At the back of the boat is where other important data was collected. There, we deployed nets to collect plankton and krill. We also gathered abiotic parameters about the water. This section is to inform you about the CTD, the hoop net and the tucker trawl. Why would collecting plankton and krill be important? What would be an example of some abiotic parameters that could be measured in ocean water?
Some of the transects on the map to the left are marked with black dots and yellow stars. Black dots are where we would drop a device called a CTD into the water. CTD stands for conductivity, temperature and depth sensor. The boat would stop at the station and two of us would guide the CTD to the center of the back edge of the boat. The two crew members (Captain Erik Larson and mate Dave Benet) would locate themselves at two stations on the boat where they could control the movement of the boat and the winch. The winch wire could be attached o any heavier device that needed to be deployed off of the back. We would use the computer to determine the depth at that location. Then we would communicate with Erik and Dave to tell them how deep to drop the CTD. Why did we all have to wear hard hats? Why are we wearing large orange jackets?
Controlling the back-deck operations
Another job we did off the back was to gather zooplankton with the hoop net. We would attach the net to the winch. The crew would assist us in dropping it to the proper depth (approximately 50 meters which was as close to the bottom as we could get without dragging the net). After a specific amount of time we would bring the net up and put the sample into collection bottles. These bottles will be sent to a lab to be analyzed after the trip. It was amazing to see the variability of organisms in the net. We found krill in all stages of development.
Andrea and I positioning the CTD
Sometimes the sample would be ruined if we captured a jelly fish. Having a jelly fish in the plankton net acts as a slimy block. Our net would sometimes come up with a clean sample of plankton, other times the net would be covered with brownish slime (phytoplankton) which required a lot of cleaning afterwards. The science team was very interested in the status of the krill in the catch.
Deploying the hoop netThe tucker trawl
Another net that was used to collect samples was called the tucker trawl. We would deploy the tucker trawl when the vessel came to the continental shelf break (about 200 meters) of transects 2, 4, and 6, 8 and 10. This net required 3 to 4 people to launch it. It had three plankton nets, each of which was set to close at specific depths. Our first sample came up with mud from the bottom (the net hit the bottom by mistake). Included in that mud was a purple slimy hagfish and a few tiny sea stars. A later sample was filled with krill.
Water nutrient samples were also gathered from the side of the boat. Cordell Bank and Gulf of the Farallones National Marine Sanctuaries can be rich in nutrients such as phosphorus and nitrogen due to upwelling.
Obtaining water for nutrient samples
Upwelling occurs when strong winds drive warm, nutrient-poor surface waters away from the shore. These surface waters are replaced by nutrient-rich deep water and provide nutrients for the unicellular algae. What is upwelling?What importance are nutrients to algae?
NOAA Teacher at Sea
Elaine Bechler
Aboard R/V Fulmar
July 21 – 26, 2011
Mission: Survey of Cordell Bank and Gulf of the Farallones NMS Geographical Area of Cruise: Pacific Ocean, Off the California Coast Date: July 25, 2011
Science and Technology Log
Humpbacks performing vertical lunge feeding
Cool stuff today. While transiting between one transect and another, the R/V Fulmar happened upon a major feeding event. While approaching, hundreds of birds could be seen flying and diving along with evidence of many humpback whale spouts. It turned out to be a furious feeding frenzy of myriads of birds, dolphins, pinipeds and whales. Very dramatic was the vertical lunge feeding of the humpback whales. We could see their huge mouths open and pointed upward as they gobbled silvery fish. The whales would release huge loud exhales over and over. A pod of 20 Pacific white-sided dolphins would lunge and dive down randomly seeking the swift swimmers. Entering from the north side came a pod of Northern-right whale dolphins so sleek and moving in a group as if choreographed. Thousands of seabirds including Sooty and Pink footed Shearwaters, Northern Fulmars, Black-footed Albatrosses, Western Gulls, Fork-tailed Storm Petrels and Common Murres were diving and competing for the fish. We could hear the feet, wings, beaks and calls from their interactions on the surface. It was remarkable to see the shearwaters swimming after the prey. The feeding group would move and change as the school of fish darted about from below. It was a tumultuous feast.
Bird feeding frenzyShearwater feeding under water
What we witnessed was the food web in action! Each of these animals was supported by the fish they were eating. Those fish were supported by a smaller food source such as smaller fish and zooplankton. Those small organisms rely on the phytoplankton to capture the solar radiation from the sun and to use the deep water nutrients which were upwelled to the surface waters. Create 5 food chains 5 organisms long that could have been in place in the ocean that day.
Dall's Porpoise
Earlier I noted a Western Gull spy a white object in the water and attempt to land on it for feeding only to find it was a piece of paper. I had never observed the interaction of a marine animal with marine debris until now. It was obvious that the debris caught the gull’s attention from a good distance away and had attracted it to the surface of the water. How could this action affect the food web?
I feel fortunate to have been chosen to experience this cruise and all that went along with it. I’d do it again in a heartbeat (with sufficient amounts of seasickness medication!). Thank you R/V Fulmar crew, ACCESS team, PRBO Conservation Science , TAS team and NOAA for this opportunity. Thank you Sophie Webb for all of the photos of the frenzy on this page.
NOAA Teacher at Sea Anne Mortimer Onboard NOAA Ship Oscar Dyson July 4 — 22, 2011
Mission: Pollock Survey Geographical area of cruise: Gulf of Alaska Date: July 14, 2011
Weather Data from the Bridge Conditions: sunny and windy
Air Temperature: 10.1 ⁰C
Sea Temperature: 7.6 ⁰C
Wind direction: 237 ⁰C
Wind speed: 20 knots
Wave height: 2-3 ft.
Swell height: 5-6 ft.
Science and Technology Log
My last blog I said that I would talk more about the cam-trawl. This technology was created by scientists working on the pollock survey. The purpose behind the cam-trawl is to be able to put a net in the water with an open cod-end (basically a net with an opening at the end), and have images of the number, species, and size of fish that went through the net. Of course, sometimes some fish would have to be brought on deck so the otoliths and stomachs could be taken back to the lab in Seattle. Overall, this could eliminate taking so many research-based fish and/or invertebrate samples. When cam-trawl is used on acoustic-trawl surveys, the echograms can be matched up with the stereo-camera images which can provide more data about the distribution of fish or other marine organisms in the water.
How the cam-trawl works: it is a stereo-camera system that takes snapshots of whatever comes through the net. These images allow the research team (including me on this leg) to determine the approximate number, species (some, not all), and size of fish that go through the net.
This still image from the cam-trawl shows a salmon and pollock against a black “curtain.”
The pictures are taken at the same time, but because of the slight difference in camera position, they look similar but not identical. You can mimic this with your eyes by looking at an object with only your right eye, then switching to looking with only your left eye. Did you see the same object but from a slightly different perspective? This is called disparity, or parallax (astronomers often use parallax to estimate the distance of far-away stars or other celestial objects). The program that was written for the cam-trawl (also by this research team) can then calculate the approximate size of the fish based on their relative positions.
In this photo, I’m using the cam-trawl measuring program to measure a sample of fish.This screen shot shows the stereo-images and the yellow measurements that I’ve added. Using the lengths that I’ve chosen for the program, it calculates the approximate length (in meters) of the fish.
Personal Log
After several windy days with lots of swell, I’m happy to be in calmer waters. I’ve been working on the computer for some of the time which doesn’t go well with swell. I have also found it to be very tiring and tense on my body to be in constant motion and prepared to grab whatever I can to stay upright. I can’t tell you how hard it is to use a treadmill or take a shower in rough seas! BUT, for the time being, it’s calm and I just watched a great sunset over Kodiak island with a few humpback whale blows in the distance. If you are still wondering about the salmon in the picture above, it’s a chum!
NOAA Teacher at Sea Anne Mortimer Onboard NOAA Ship Oscar Dyson July 4 — 22, 2011
Mission: Pollock Survey Geographical area of cruise: Gulf of Alaska Date: July 7, 2011
Weather Data from the Bridge Air temperature: 9.53 C, Foggy
Sea temperature: 8.19 C
Wind direction: 145
Wind Speed: 18.73 knots
Barometric pressure: 1013.22 mbar
Science and Technology Log
Last night, we attempted a bottom trawl for walleye pollock. The way scientists know that fish are present is by using acoustic sampling. The centerboard of the ship is set-up with sound emitting and recording devices. When a sound wave is emitted toward the bottom, it will eventually be returned when it hits a fish or the ocean bottom. This is called echo-sounding and has been used by sport & commercial fisherman and researchers for many decades. The sound waves are sent down in pulses every 1.35 seconds and each returned wave is recorded. Each data point shows up in one pixel of color that is dependent on the density of the object hit. So a tightly packed group of fish will show as a red or red & yellow blob on the screen. When scientists see this, they fish!
This echogram shows scientists where fish can be found.
The scientists use this acoustic technology to identify when to put the net in the water, so they can collect data from the fish that are caught. The researchers that I am working with are specifically looking at pollock, a mid-water fish. The entire catch will be weighed, and then each species will be weighed separately. The pollock will all be individually weighed, measured, sexed, and the otolith removed to determine the age of the fish. Similar to the rings on a tree, the otolith can show the age of a fish, as well as the species.
A pollock otolith.Pollock otolith in my hand
These scientists aren’t the only ones that rely on technology, the ships navigation systems is computerized and always monitored by the ship’s crew. For scientific survey’s like these, there are designated routes the ship must follow called transects.
This chart shows the transects, or route, that the ship will follow.This chart shows the route (white line) of the ship once fish were spotted. When scientists find a spot that they want to fish (green fish symbol), they call up to the bridge and the ship returns to that area. As the ship is returning, the deckhands are preparing the net and gear for a trawl.
Personal Log
I think that I must have good sea legs. So far, I haven’t felt sick at all, although it is very challenging to walk straight most times! I’ve enjoyed talking with lots of different folks working on the ship, of all ages and from all different places. Without all of the crew on board, the scientists couldn’t do their research. I’ve been working the night shift and although we’ve completed a bottom trawl and Methot trawl, we haven’t had a lot of fish to sort through. My biggest challenge is staying awake until 3 or 4 am!
Did you know?
That nautical charts show depths in fathoms. A fathom is a unit of measurement that originated from the distance from tip to tip of a man’s outstretched arms. A fathom is 2 yards, or 6 feet.
Species list for today:
Humpback Whale
Northern Fulmar
Tufted Puffin
Stormy Petrel
Fish biologist Kresimir found this petrel in the fish lab; attracted to the lights it flew inside by accident. The petrel is in the group of birds called the tube-nosed sea birds. They have one or two "tubes" on their beak that helps them excrete the excess salt in their bodies that they accumulate from a life spent at sea.
In the Methotnet:
Multiple crab species including tanner crabs
Multiple sea star species, including rose star
Sanddollars
Juvenile fish
Brittle stars
Sponge
Multiple shrimp species including candy striped shrimp
These are some of the shrimp types that we found in our Methot net tow.
NOAA Teacher at Sea Kathleen Harrison Aboard NOAA Ship Oscar Dyson July 4 — 22, 2011
Location: Gulf of Alaska Mission: Walleye Pollock Survey
Date: July 4, 2011
Weather Data from the Bridge
Barometric Pressure: 1018.32 mb
Air Temperature: 8.77 ° C
Sea Temperature: 9.31 ° C
True Wind Direction: 218.63 °
True Wind Speed: 16.94 knots
Latitude: 55.12° N, Longitude: 157.31° W
Ship’s speed: 12.5 knots
Personal Log
Kodiak has the second largest fishing fleet in the U.S. This photo shows some of the various kinds of fishing boats that are docked in Kodiak.This is the survival suit, equipped with strobe light, inflatable, and leash. It is affectionately called "Gumby Suit". Isn't it adorable?
July 5, 2011: I might not have seen fireworks yesterday, but it was still a pretty exciting day, with the departure of the Oscar Dyson from the pier. I stood outside on the forward deck, and enjoyed the view as we pulled away from Kodiak. We have been cruising at a steady 12.5 knots (13.5 mph), heading toward the start point of Leg II of the Walleye Pollock Survey. Our charted course will take us from an area that is southwest of Kodiak Island, up past the east side of the island, and around to the west side of the island, ending back in the port of Kodiak. I will start working tomorrow morning – 4 am! Scientific information will probably be included in the next log entry. Kodiak is a scenic fishing town, on the edge of the island. In the picture above is one of the marinas.
Right before we left Kodiak, the ship ran 2 drills. We had to carry our survival suit to our muster station, and learn about abandoning ship, and fire drill procedures. I hope I never have to wear this suit for real, as I was quite claustrophobic putting it on. I know I would be thankful for it, if the need for wearing it ever came about.
I spent some time on the bridge, learning about radar, navigation, and sea birds. I even saw a whale spout!
NOAA TEACHER AT SEA JASON MOELLER ONBOARD NOAA SHIP OSCAR DYSON JUNE 11 – JUNE 30, 2011
NOAA Teacher at Sea: Jason Moeller
Ship: Oscar Dyson
Mission: Walleye Pollock Survey
Geographic Location: Whale Pass
Date: June 28-29, 2011
Ship Data
Latitude: 58.01 N
Longitude: -152.50 W
Wind: 23.95 knots
Surface Water Temperature: 9.4 degrees C
Air Temperature: 10.8 degrees C
Relative Humidity: 71%
Depth: 177.72 m
Personal Log
Welcome back, explorers!
Due to the injury to the deck hand, we are done fishing. Our trip has been cut a day short and we are now headed back to Kodiak. We should arrive tomorrow morning, and I will fly back home on the 30th.
The shortest route to Kodiak was through Whale Pass, a break in Kodiak Island. The pass made for some spectacular scenery.
The entrance to Whale Pass, from the back of the Oscar DysonSteep hills rolling down into the water were a common sight in the pass.An island with a navigational marker in whale pass.There were some spectacular views of the mountains in the pass as well.Another view of the mountains.Another view of the mountains.And another...Last one, I promise! We all liked the shape of this one.A waterfall drops away into the ocean.
The coolest part of the pass, though, is definitely the wildlife. We saw sea otters everywhere! Unfortunately, they were so fast and at a great enough distance that the following shot is the only decent one I was able to take.
A sea otter at Whale Pass.
We also saw an animal that I have been hoping to see for a long time.
Sorry about the grainy image, but it is the only one of the Orcas we were able to get.
We also saw a puffin, but it moved so quickly that there was no hope at a photo for it. Bummer. Several humpback whales were also spotted, along with numerous gulls and other seabirds.
Science and Technology Log
Today, lets talk about krill!
What are krill, you ask? They’re animals in the Phylum Arthropoda, which means they’re related to insects, spiders, crabs, lobsters, etc. They have jointed legs and an exoskeleton, are usually a couple of centimeters in length, and are reddish/orange-ish in color. They can often be found in dense schools near the surface of the water, and play an important role in the ecosystem as a source of food for lots of larger animals (like fish, whales, & penguins).
I’ve mentioned the two types of trawl gear that we use to catch fish, but if we want to catch smaller things like plankton, the mesh on those nets is way too small. Therefore, we use a third type of trawl called the Methot which has very fine mesh to corral the plankton down into a collection container at the end of the net. In addition to having a hard container at the end — as opposed to just a bag/codend that you see in the fish trawls — the Methot trawl also has a large metal frame at the beginning of the net. Check out the photos below.
The Methot trawl being taken from the water. Note the square frame.The container that collects all of the plankton in the net.
After the net is brought back on deck, one of the fishermen or deck hands brings the container of krill into the fish lab. The first thing we do is dump the container into a sieve or a bucket and start picking out everything that isn’t krill. The two most common things that are collected (besides krill) are gelatinous animals (like jellyfish & salps) and larval fish. The fish get weighed (as one big unit, not individually) and then frozen for someone to look at later on.
The larval fish that we separated from one plankton tow.
After sorting the catch, we’re left with a big pile of krill, which gets weighed. We then take a small subsample from the big pile of krill (it’s a totally random amount depending on how much we scoop out!) and then weigh the subsample. Then the fun begins, as I’m the one that does this job; I get to count every single individual krill in the subsample. Tedious work. All of the data is then entered into the computer system, and the krill and anything else that we’ve caught (besides the larval fish) are thrown back into the water.
Tammy sorts through the pile of krill.How many individual krill are in this picture?
Q. What has been your favorite thing about this trip so far?
A. I’ve been asked this question several times over the course of the last few weeks, but I’ve waited until the end to answer it.
Truth be told, it’s almost impossible to pick a favorite thing that I’ve seen or done. There are so many candidates! Exploring the Buskin River and seeing bald eagles before we set sail was a blast! Eating fresh caught salmon for the first time was a great experience, as it just melted in my mouth. Leaving shore for the first time was a lot of fun, as there is no feeling like the salt air blowing past your face at the front of a boat. Trying to take pictures of flying birds with a digital camera was a challenge, and we all had a good time laughing at the blurred images. Getting better at photography is something I’ve always wanted to do, and I feel like I have improved that. The first fish lab with the sleeper shark was great! Working in the fish lab, as messy as it was, was also a lot of fun! The XBT prank that was pulled on me was one of the best executed pranks I’ve ever seen, and it was hilarious! Hanging out and reading Martin’s Game of Throne series during breaks with my fellow scientists was a lot of fun as well, as it was just like a book club. Today’s ride through Whale Pass with the otters, whales, and mountains was exactly what I dreamed Alaska would be like.
The scientists sense of humor also made it an enjoyable trip. For example, this is what happens when you play around with the net camera for too long.
See what I mean?
That being said, if I was absolutely forced to pick a favorite memory, it would probably the impromptu fishing trip at Sand Point. You know you love your job when you decide to keep going at it on your day off.
There will be one last log posted, so if you have questions please send them to me at jmoeller@knoxville-zoo.org!
NOAA TEACHER AT SEA JASON MOELLER ONBOARD NOAA SHIP OSCAR DYSON JUNE 11 – JUNE 30, 2011
NOAA Teacher at Sea: Jason Moeller
Ship: Oscar Dyson
Mission: Walleye Pollock Survey
Geographic Location: Gulf of Alaska
Dates: June 25-27, 2011
Ship Data
Latitude: 55.58 N
Longitude: -159.16 W
Wind: 14.11
Surface Water Temperature: 7.2 degrees C
Air Temperature: 9.0 degrees C
Relative Humidity: 90%
Depth: 85.61
Personal Log
Anyone who has seen the show Deadliest Catchknows how dangerous crab fishing can be. Fishing for pollock, however, also has its dangers. Unfortunately, we found out the hard way. One of our deck hands caught his hand between a cable and the roller used to pull up the trawl net and hurt himself badly.
The cable and the roller.
Fortunately, the injuries are not life threatening and he will be fine. The injuries did require a hospital visit, and so we stopped at Sand Point to treat him.
This is the town of Sand Point.Clouds hang over the hills at Sand Point. The airstrip is in the left edge of the photo.
We stayed at Sand Point for nearly 48 hours. What did we do? We fished, of course! We used long lines and hooks, and had a great time!
Bill and Alex cast fishing lines in the harbor. We tied the lines off on the boat and hauled them up from time to time to check the bait.Alex with a flounder that he caught! He also caught several cod and a 32-lb Pacific halibut!Cod and the flounder in a bucket!As with every fishing trip, we also managed to catch things that we didn't mean too! Tammy (the other NOAA Teacher at Sea) especially liked the kelp!A few visitors always hitched a ride on the kelp we caught. Here is a tiny sea urchin.
This crab was another hitchhiker on the kelp.
We were bottom fishing for Halibut, and a starfish, the largest one I've ever seen, went after the bait!
A one-day fishing license in Alaska costs $20.00. We had internet, so five of us went online and bought the fishing passes. Was it worth it?
You bet it was! This is the 25-lb halibut I caught! It was AWESOME!!!
We filleted it and had the cooks make it for dinner. With the halibut, we also cut out the fleshy “cheeks” and ate them as sushi right on the spot! It doesn’t get any fresher (or tastier!) than that!
Science and Technology Log
Today we will look at the acoustic system of the Oscar Dyson! Acoustics is the science that studies how waves (including vibrations & sound waves) move through solids, liquids, and gases. The Oscar Dyson uses its acoustic system to find the pollock that we process.
The process begins when a piece of equipment called a transducer converts an electrical pulse into a sound wave. The transducers are located on the underside of the ship (in the water). The sound travels away from the vessel at roughly 1500 feet per minute, and continues to do so until the sound wave hits another object such as a bubble, plankton, a fish, or the bottom. When the sound wave hits an object, it reflects the sound wave, sending the sound wave back to the Oscar Dyson as an echo. Equipment onboard listens to the echo.
The computers look at two critical pieces of information from the returning sound wave. First, it measures the time that it took the echo to travel back to the ship. This piece of information gives the scientists onboard the distance the sound wave traveled. Remember that sound travels at roughly 1500 feet per minute. If the sound came back in one minute, then the object that the sound wave hit is 750 feet away (the sound traveled 750 feet to the object, hit the object, and then traveled 750 feet back to the boat).
The second critical piece of information is the intensity of the echo. The intensity of the echo tells the scientists how small or how large an object is, and this gives us an idea of what the sound wave hit. Tiny echos near the surface are almost certainly plankton, but larger objects in the midwater might be a school of fish.
An image of the computer screen that shows a great number of fish. This was taken underneath the boat as we were line fishing in Sand Point.The same spot as above, but with practically no fish.An image of the screen during a trawl. You can actually see the net--it is the two brown lines that are running from left to right towards the top of the screen.
One of the things that surprised me the most was that fish and bubbles often look similar enough under water that it can fool the acoustics team into thinking that the bubbles are actually fish. This is because many species of fish have gas pockets inside of them, and so the readout looks very similar. The gas pockets are technically called “swim bladders” and they are used to help the fish control buoyancy in the water.
Swim bladder of a fish.
Species Seen
Northern Fulmar
Gulls
Cod
Pacific Halibut
Flounder
Sea Urchin
Crab
Kelp
Reader Question(s) of the Day
Today’s questions come from Kevin Hils, the Director of Chehaw Wild Animal Park in Chehaw, Georgia!
Q. Where does the ship name come from?
A. Oscar Dyson was an Alaska fisheries industry leader from Kodiak, Alaska. He is best known for pioneering research and development of Alaska’s groundfish, shrimp, and crab industry. Dyson was a founding partner of All Alaskan Seafoods, which was the first company actually controlled by the fishermen who owned the vessel. He also served on the North Pacific Fisheries Management council for nine years. He is in the United Fishermen of Alaska’s hall of fame for his work. The ship was christened by his wife, Mrs. Peggy Dyson-Malson, and launched on October 17, 2003.
Oscar DysonThe launching of the Oscar Dyson
Q. How do you see this helping you teach at Knoxville Zoo, not an aquarium?
A. This will be a long answer. This experience will improve environmental education at the zoo in a variety of different ways.
First, this will better allow me to teach the Oceanography portion of my homeschool class that comes to the zoo every Tuesday. For example, I am in the process of creating a hands on fishing trip that will teach students about the research I have done aboard the Oscar Dyson and why that research is important. Homeschool students will not just benefit from this experience in Oceanography, but also in physics (when we look at sound and sonar) and other subjects as well from the technical aspects that I have learned during the course of the trip.
Scouts are another group that will greatly benefit from this experience as well. The Girl Scout council wishes to see a greater emphasis in the future on having the girls do science and getting real world experiences. While the girls are still going to desire the animal knowledge that the zoo can bring, they will also expect to do the science as well as learn about it. My experience aboard the Dyson will allow me to create workshops that can mimic a real world animal research experience, as I can now explain and show how research is done in the field.
The same can be said of the boy scouts.
In addition, one of the most common badges that is taught to boy scout groups that come in is the fish and wildlife merit badge. In the past, the badge has primarily focused on the wildlife aspect of this topic. However, I now have the knowledge to write and teach a fisheries portion for that merit badge, as opposed to quickly covering it and moving on. This will enrich future scouts who visit the zoo for this program.
A major focus for all scouts is the concept of Leave No Trace, where scouts are supposed to leave an area the way they found it. The fisheries research being done aboard the Dyson is focused toward that same goal in the ocean, where we are attempting to keep the pollock population as we found it, creating a sustainable fishery. The goal aboard the Dyson is similar to the goal in scouting. We need to be sustainable, we need to be environmentally friendly, and we need to leave no trace behind.
School children on field trips will greatly benefit, especially students in the adaptations section. There are some bizarre adaptations that I never knew about! For example, sleeper sharks slow, deliberate movement coupled with their fin and body shape basically make them the stealth fighter of the fish world. They can catch fish twice as fast as they are! Lumpsuckers are neat critters too! This knowledge will enhance their experience at the zoo during field trip programs.
Finally, I can pass the knowledge from this experience on to my coworkers. This will not only better the experience of my students, but it will also improve the outreach programs, the bedtime programs, the camps, and other programming done at the zoo.
Q. Are you old enough to be on a ship? You look like you’re 13???!!!!
A. SHHHHHHH!!!! You weren’t supposed to tell them my real age! They think I’m 24!
NOAA TEACHER AT SEA JASON MOELLER ONBOARD NOAA SHIP OSCAR DYSON JUNE 11 – JUNE 30, 2011
NOAA Teacher at Sea: Jason Moeller Ship: Oscar Dyson Mission: Walleye Pollock Survey Geographic Location: Gulf of Alaska Dates: June 21-22, 2011
Ship Data
Latitude: 55.03N
Longitude: -163.08W
Wind: 17.81 knots
Surface Water Temperature: 6.7 degrees celsius
Air Temperature: 10.10 degrees celsius
Humidity: 85%
Depth: 82.03 meters
Personal Log
Welcome back, explorers!
June 21
Today has been the calmest evening since I boarded the Oscar Dyson. The night shift did not fish at all, which meant that I basically had an evening off! Even the evenings we have fished have been relatively calm. It takes us about an hour to an hour and a half to process a haul of fish, and up to this point we average about one haul per night. That gives me quite a bit of down time! When I am on shift, that down time is usually spent in one of two places.
The first spot is the computer lab in the acoustics room. This is the room where we wait for the haul to be brought in. I write the logs, lesson plan, check emails, and surf the web during quiet times.This is the lounge. The cabinet under the TV has over 500 movies, and a movie is usually playing when I walk in. Behind the couch is a large bookshelf with several hundred books, so I have done a fair amount of pleasure reading as well.
When I am not sitting in one of these two places, I am usually running around the ship with my camera taking nature photos. Below are the best nature photos of the past three days.
One of the coolest things about the Aleutian islands has to be the number of volcanoes that can be seen. This is the one on Unimak Island.A second picture of the same volcano.This is just a cool rock formation off of the coast. The Oscar Dyson has been hugging the coast the entire trip, which has been great for scenery.A gull skims the water by the Oscar Dyson.A gull wings toward the Oscar Dyson
June 22
We resumed fishing today! These trawls brought in quite a few species that I had not seen before, along with the ever plentiful pollock.
The net, filled with fish!Jason waits for the net to load the fish onto the conveyor belt.Here, I am separating the arrowtooth flounder from the pollock.We managed to catch a skate in the net! Skates are very close relatives to sharks. We quickly measured it and then released it into the ocean.A second photograph of the skate.Do you remember the little lumpsucker from a few posts back? This is what an adult looks like!The lumpsucker was slimy! I tried to pick it up with my bare hands, and the slime gummed up my hands so that I couldn't pick it up! Even with gloves designed for gripping fish I had trouble holding on.A closeup of the lumpsuckerThis fish is called a sculpin.I finally saw a crab! None of us know what was attached to it, but the scientists believe that it was an anemone.This is a starfish the net pulled up.
Science and Technology Log
There is no Science and Technology Log with this post.
Today’s question comes from James and David Segrest, who are two of my homeschool students!
Q. What do you eat while you are on your adventures? Do you get to catch and eat fish?
The food is great! Our chef has a degree in culinary arts, and has made some amazing meals!
I wake up at 2:30 pm for my 4 pm to 4 am night shift, and usually start my day with a small bowl of oatmeal and a toasted bagel. At 5 pm, about two hours after breakfast, dinner is served, and I will eat a huge meal then too. Every meal has two main courses, a vegetable, a bread, and dessert. We have had a wide variety of main courses which have included bratwurst, steak, gumbo with king crab, fish, chicken parmesan, spaghetti with meatballs, and others!
We will often eat some of the fish we catch, usually salmon and rockfish since those provide the best eating. The salmon disappears to the kitchen so quickly that I have not actually been able to get a photo of one! We have not caught a halibut in the trawl net yet, otherwise we would likely have eaten that as well. Yum! We have not yet eaten pollock, as it is viewed as being a much lower quality fish compared with the rockfish and salmon.
NOAA TEACHER AT SEA JASON MOELLER ONBOARD NOAA SHIP OSCAR DYSON JUNE 11 – JUNE 30, 2011
NOAA Teacher at Sea: Jason Moeller Ship: Oscar Dyson Mission: Walleye Pollock Survey Geographic Location: Gulf of Alaska Dates: June 17-18, 2011
Ship Data
Latitude: 52.34 N
Longitude: -167.51 W
Wind Speed: 7.25 knots
Surface Water Temperature: 6.6 Degrees C
Air Temperature: 7.1 Degrees C
Relative Humidity: 101%
Depth: 63.53 meters
All of the above information was found on http://shiptracker.noaa.gov. Readers can use this site to track exactly where I am at all times!
Personal Log
Welcome back, explorers!
It has been a very eventful 24 hours! We have started fishing, but have done so little that I will wait to talk about that in the next log. Tammy, the other Teacher at Sea, has not begun fishing yet, and as we will be writing the science and technology log together, I will save the fishing stories until she has had a chance to fish.
After turning in last night’s log, we managed to spot eight or nine humpback whales on our starboard side that appeared to be feeding at the surface. They were too far away to get any decent photos, but it was a lot of fun to watch the spouts from their blowholes tower up into the air.
Ten whale spouts rise in the distance.
This afternoon started off by dropping an expendable bathythermograph (from here on out this will be referred to as an XBT). The XBT measures the temperature and depth of the water column where it is dropped (there will be more on this in the Science and Technology section). I was told that I would be dropping the XBT this time, and was led off by Sarah and Abby (two of the scientists on board) to get ready.
The first thing I had to do was to get dressed. I was told the XBT would feel and sound like firing a shotgun, so I had to put on eye, ear and head protection. I was also put in a fireman suit to protect my body from the kickback, since I am so small. The XBT launcher is the tube in my hands.This is me launching the XBT. Why no smoke? All we actually needed to do was drop the device over the side. The whole shotgun experience was a prank pulled off by the scientists on all of the new guys. Their acting was great! When I turned towards Sarah at one point with the launcher, she ducked out of the way as if afraid I would accidentally fire it. I fell for it hook, line, and sinker.
However, the prank backfired somewhat. As the scientists were all laughing, a huge wave came up over the side of the ship and drenched us. I got nailed, but since I was in all of the gear, I stayed dry with the hem of my jeans being the only casualty. Sarah didn’t get so lucky. Fun times!
Sarah looking a bit wet.
Science and Technology Log
Today, we will be looking at the XBT (the expendable bathythermograph). Bathy refers to the depth, and thermo refers to the temperature. This probe measures the depth and temperature of the water column when it is dropped over the starboard side of the ship.
“Dropping” isn’t exactly the right phrase to use. We use a launcher that resembles a gun. See the photo below to get an idea of what the launcher looks like.
This is the XBT Launcher.The silver loop is the pin for the launcher. To launch the probe, we pulled the pin and flung out our arm. The momentum pushed the probe out of the tube and into the water below.
The probe.
The probe is connected to a length of copper wire, which runs continuously as the probe sinks through the water column. It is important to launch the probe as far away from the ship as possible, as the copper wire should never touch the ship. If the wire were to touch the ship, the data feed back to the ship would be disrupted and we would have to launch another probe, which is a waste of money and equipment. The survey technician decides to cut the wire when he/she has determined that sufficient data has been acquired. This normally occurs when the probe hits the ocean floor.
This is a quick and convenient way to collect data on the depth and temperature of the water column. While the ship has other methods of collecting this data (such as a Conductivity, Temperature, and Depth (CTD) probe), the XBT is a simpler system that does not need to be recovered (as opposed to the CTD).
A CTD
Data collected from the most recent XBT.
Latitude: 53.20 degrees N
Longitude: 167.46 degrees W
Temperature at surface: 6.7 degrees C
Temperature at bottom: 5.1 degrees C
Thermocline: 0 meters to 25 meters.
The thermocline is the area where the most rapid temperature change occurs. Beneath the thermocline, the temperature remains relatively constant.
Today’s reader questions come from James and David Segrest, who are two of my students in Knoxville Zoo’s homeschool Tuesday classes!
1. Did pirates ever travel the path you are on now? Are there any out there now?
A. As far as I know, there are no pirates currently operating in Alaska, and according to the scientists, there were not any on the specific route that we are now traveling. However, Alaska does have a history of piracy! In 1910, a man named James Robert Heckem invented a floating fish trap that was designed to catch salmon. The trap was able to divert migrating salmon away from their normal route and into a funnel, which dumped the fish off into a circular wire net. There, the fish would swim around until they were taken from the trap.
Workers remove salmon from a fish trap in 1938. Historic Photo Courtesy of the U.S. Fish & Wildlife - Fisheries Collection - Photographer: Archival photograph by Mr. Sean Linehan, NOS, NGS.
For people who liked eating fish, this was a great thing! The salmon could be caught quickly with less work, and it was fresh, as the salmon would still be alive when taken from the trap. For the traditional fisherman, however, this was terrible news. The fishermen could not compete with the traps and found that they could not make a living. The result was that the fishermen began raiding the floating traps, using any means possible.
A barge of salmon going to a cannery. Fishermen could not compete with traps that could catch more fish. Historic Photo Courtesy of the U.S. Fish & Wildlife - Fisheries Collection -Photographer: Archival photograph by Mr. Sean Linehan, NOS, NGS
The most common method used was bribery. The canneries that operated the traps would hire individuals to watch the traps. Fishermen would bribe the watchers, steal the fish, and then leave the area. The practice became so common that the canneries began to hire people to watch the trap-watchers.
2. Have you seen any sharks? Are there any sharks that roam the waters where you are traveling?
Hi James and David! Here is your shark! It's a Pacific Sleeper Shark.The shark in the netAnother image of the shark on the conveyor belt.
This is a Pacific Sleeper Shark. It is called a sleeper shark as it does not appear to move a great deal, choosing instead to glide with very little movement of its fins. As a result, it does not make any noise underwater, making it the owl of the shark world. It hunts much faster fish (pollock, flounders, rockfish) by being stealthy. They are also known to eat crabs, octopus, and even snails! It is one of two animals known to eat giant squid, with the other one being sperm whales, although it is believed that these sharks probably scavenge the bodies of the much larger squid.
The other shark commonly seen is the salmon shark. Hopefully, we will catch one of these and I will have photos later in the trip.
NOAA TEACHER AT SEA JASON MOELLER ONBOARD NOAA SHIP OSCAR DYSON JUNE 11 – JUNE 30, 2011
NOAA Teacher at Sea: Jason Moeller Ship: Oscar Dyson Mission: Walleye Pollock Survey Geographic Location: Gulf of Alaska Dates: June 14-16, 2011
Personal Log
Welcome back, explorers!
June 14
I think I posted my last log too soon, because as soon as I hit the send button interesting things began to happen. First, I was called up to see some Mountain Goats feeding in the wild! I was able to take a picture of them as well! (Well, kind of…)
The mountain goats were so far away I had to use binoculars just to spot them. If you can spot the two tiny white dots to the right of the snow, that is them! There is also one that is on the left hand side in the middle of the photograph. You will have to take my word for it.
While this was going on, the professional members of the science team were still calibrating the sonar that we are going to use to catch the fish! I have explained the process in the captions of the following photographs.
Calibrating starts with these little balls. The one used to calibrate our sonar was made of Tungsten (like the black ball at the top)The ball was suspended underneath the water on three poles, placed in a triangular shape, around the ship. This is a photo of one of the poles.Once the ball was placed underneath the boat, the scientist swept sound waves off of the ball and used the above screen to see where the sound waves were striking the ball and reflecting. This allowed them to adjust the sound waves to hit the ball (or out in the ocean, the fish) exactly where they wanted it. This optimizes the amount of sound coming back to the boat and paints a better picture of what is under the water.
The process took several hours, but once we finished, we headed back out to sea to start the two-day journey towards our first fishing spot!
June 15-16
The most common sight off of the boat for the past two days has been this one.
Water, water, everywhere
We are currently in Unimak Pass, which will lead us to the Bering Sea! Unimak Pass is the fastest sea route from the United States into Asia, and as a result is a common merchant route between Seattle and Japan. It is also the best way to avoid rough seas and bad weather when travelling between the Gulf of Alaska and the Bering Sea, as it receives some cover from the landmass.
The Bering Sea likely needs no introduction, as it is arguably the best crab fishing waters on the planet and is well-known from the television show The Deadliest Catch. Aside from crab, the Bering Sea is teeming with life such as pollock, flounder, salmon, and halibut. As a result of this diverse and tasty biomass, the Bering Sea is an incredibly important area to the world’s fisheries.
Steaming towards our destination has kept us away from any land, but there are still things to do and to see! We did a second dry cast of the net, but this time two different pieces of equipment were tested.
The first piece of equipment was a special net for taking samples. The net has three sections, called codends, which can be opened and closed individually. You can see two of the codends in this photo. On top of the green net, you should see black netting that is lined with white rope. These are the codends.This is a better view of the codends. The codends are opened and closed using a series of six bars. When the first bar is dropped, the first codend is able to take in fish. When the second bar is dropped, the codend is unable to take in fish. The bar system has not worked incredibly well, and there is talk of removing one of the codends to make the net easier to use.The second piece of equipment was this camera, which was attached to the net. It allowed us to see what was coming in the net. Even though this was a dry run and we were not catching anything, I still saw a few Pollock in the camera!
Even though this was a test run and we did not catch any fish, the birds saw the net moving and came to investigate. The remaining photographs for the personal log are of the several species of birds that flew by the boat.
A Northern Fulmar flies alongside the Oscar DysonAn albatross (by the thin wire just below the spot the water meets the horizon) flies away from the Oscar DysonFulmar's and Gulls wheel about the Oscar Dyson, looking for fish.
Science and Technology Log
This section of the blog will be written after we start fishing for Pollock in the next day or so!
New Species
Mountain Goats
Northern Fulmar
Albatross
Gulls
Reader Question(s) of the Day!
First, I owe a belated shout out to Dr. John, Knoxville Zoo’s IT technician. He lent me the computer that I am currently using to post these logs, and I forgot to mention him in the last post. Thanks Dr. John!
The two questions of the day also come from Kaci, a future Teacher at Sea with NOAA.
1. What is it like sleeping on the boat?
A. Honestly, I am being jostled around quite a bit. Part of this is due to the way the beds are set up. The beds go from port to starboard (or right to left for the landlubbers out there) instead of fore to aft (front to back). This means that when the boat rolls, my feet will often be higher than my head, which causes all of blood to rush to my head. I still haven’t gotten used to the feeling yet.
Part of the jostling, though, is my fault. I had heard that most individuals took the bottom bunks given the option, and since I was one of the first individuals on board, I decided to be polite and give my roommate, who outranked me by some 10-15 years at sea, the bottom bunk. It turns out that the reason people pick the bottom bunk is that the top bunk moves around more since it is higher off the floor. I’ve heard stories about people being thrown from the top bunk in heavy seas as well.
The most comfortable place to sleep has turned out to be the beanbag chair in the common room. It is considered rude to go into your room if your shift ends early, as your roommate may still be sleeping. My shift ended two hours early the other night, so I sat down on the beanbag chair to catch some zs. The ship’s rocking was greatly reduced by the bean bag chair, and I slept very well for the next couple of hours.
2. Is it stressful so far?
A. The only stressful part of the trip so far has been the seasickness, which I have not yet been able to shake. The rest of it has been a lot of fun!
