Karen Grady: One Fish Two Fish Red Fish …… Weird Fish, April 10, 2017

NOAA Teacher at Sea

Karen Grady

Aboard NOAA Ship Oregon II

April 5 – April 20, 2017

Mission: Experimental Longline Survey

Geographic Area of Cruise: Gulf of Mexico

Date: April 10, 2017

Weather Data

Latitude 2827.10
Longitude 09148.6
75 degrees
Sunny
No precipitation
Winds at 10 KTS
Waves at 2-4 FT

Science and Technology Log

We have continued to move between deep stations setting the baited line and hoping to catch deep water fish and sharks. These deep sets require longer soaking time to allow the hooks to reach the bottom.   The downside is that we have been retrieving one set of gear and putting out one set of gear in a 12 hour period of time. Some sets have a few fish and some we get a big goose egg.   There is always anticipation though as the 100 hooks are brought up. Everyone stands in their spots waiting to hear either “fish on,” “shark” or everyone’s favorite, “hard hats!” which means there is a big shark and it’s time for the sling. Below you will see the awesome Great Hammerhead (Sphyrna lewini) we caught.

TAS Karen Grady 4-13-17 great hammerhead

Great Hammerhead Shark

The first few days we have been fishing deep in the Mississippi Canyon. The Mississippi Canyon is a geological formation in the Gulf of Mexico. It is located in an area which is part of the territorial waters of the United States. We put out some deep lines with the deepest at 1900 feet. These lines soaked four hours once fully deployed.  They soak longer because they have so far to sink to get to the depth the scientists want to fish at. When we deploy a line the first thing in the water is the High Flyer, which stands like a beacon and bobs in the water marking the start of our fishing line. The next thing over the side of the ship is a weight that helps carry the line to the desired depth. Halfway through, another weight is deployed, and after the 100th hook, the third weight goes in.   The last thing over is another High Flyer to mark the end of the line. If it is dark outside, the High Flyers have lights attached on top that flash so that they can be seen.

TAS Karen Grady launching high flyer

“High Flyers” mark the beginning and the end of the long line set.

At our last deep station we caught a Mexican Grenadier, Coryphaenoides mexicanus. This fish is very unusual in color and appearance. If you feel the scales on the fish you find that they are very unique. Each scale has tiny sharp, thin spinules. As you run your hand over the fish you can feel these scale modifications. The eyes are bulged due to the pressure change of coming up from such deep depths. The scientists determined the sex of the Grenadier and then it was frozen for future study.

TAS Karen Grady 4-13-17 grenadier

Mexican Grenadier

We also caught two Cutthroat Eels, from the family Synaphobranchidae, that were both females. Synaphobranch means unified gill… the two gill slits join together making it look like a cut throat. They are bottom-dwelling fish, found in deep waters. The eels were weighed, measured, and the scientists determined the sex and maturity of each eel. It is important that they make accurate identification of specimens and collect data. The scientists work together using personal knowledge and books when necessary. There are times on deck when the scientists will stop to examine a species and will take multiple pictures of certain identifying parts so that they can look at them closely later.

 

Personal Log

One of the great things during a watch is being able to talk with the scientists. I am an avid listener and observer. This is what they do year in and year out and they love what they do. I am a quiet observer a lot of the time. I listen and then ask questions later. It’s not exactly easy to carry around paper and pencil to take notes. But during the transit portions or soak times I ask more questions and gather information to share in my blog posts or for the lesson plan I will be writing when I get home.

The food has been great here on the ship. Our stewards have fresh salads, and menus that include two main course options, a daily soup, dessert and multiple side choices.   There are snacks available 24/7 so you are never hungry. Because the meals are so great you see most people trying to fit in a workout during the day. I have been introduced to the Jacob’s ladder for workouts. I never liked hills and now I can say I don’t like climbing ladder rungs either. That machine is evil!! However, I will continue to do cardio on it as the food is excellent and keeping food in your stomach helps prevent sea sickness. I will happily eat more than I usually do if it means I don’t get seasick. An example of a typical lunch would be today when we had choices of salad, reuben, tuna melt, french fries, sweet potato fries, cookies and several other sides.

Today started with us catching two Cutthroat Eels and a Mexican Grenadier. You can see from the pictures I have posted that they look very different from most fish that you see. They really are that color. It was a shock after the sleek sharks and the bright orange Red Snapper I had seen on previous sets. I was busy watching the scientists using their books and personal knowledge to identify each species accurately.   After we finished the work up on the fish we caught we headed for the next station. Now we are back to shallower fishing and expect to catch sharks, red snapper, and a variety of other fish.

TAS Karen Grady 4-13-17 grenadier and eels

Two cutthroat eels (top) and Mexican grenadier (bottom)

I can honestly say that the 12 hour shifts start wearing you down, and sleeping is not an issue once you climb under the covers. The waves will wake you up now and then. And some mornings I wake up and can smell them cooking breakfast but sleep overrides the smell of food because I know how long it will be till I get to bed again. Walking out on deck each morning to views like this does lead to a smile on your face, that and the music that is playing loudly on the deck. Yesterday it was Hair Nation…. taking me back to the 80’s.

TAS Karen Grady 4-13-17 blue water

View from the deck of NOAA Ship Oregon II

Did You Know?

The Gulf of Mexico is roughly 995 miles along its longer, east-west axis. It has a surface area of about 600,000 square miles.

A wide variety of physical adaptations allow sharks to thrive in the Gulf of Mexico. They have powerful smell receptors. The sensory organs lining their prominent snouts, called ampullae of Lorenzini, can detect movement of potential prey even if the sharks cannot see it. These sensory organs assist in trailing injured marine animals from great distances. They help sharks locate all sort of other things, too– shrimp boats, other sharks, birds, turtles (tiger sharks a big turtle eaters!), even boats that are dumping trash.

The skin on a shark is smooth if you run your hand head to tail and rough like sandpaper if you run your hand from tail to head. At one time, sharks skin was used as a form of sandpaper. The dermal denticles, or skin teeth, can be different from species to species and can sometimes be used as a character to look at when trying to identify one species from another.

Emily Sprowls: The pressure is on! March 23, 2017

 

NOAA Teacher at Sea

Emily Sprowls

Aboard Oregon II

March 20 – April 3,2017

Mission: Experimental Longline Survey

Oregon2

NOAA Ship Oregon II

Geographic Area of Cruise: Gulf of Mexico

Date: March 23, 2017

Weather Data from the Bridge

13:00 hours

28°03.9’ N 89°08.3’W

Visibility 10 nm, Haze

Wind 3kts 100°E

Sea wave height <1 ft.

Seawater temp 25.1°C

 Science and Technology Log

The past two days have been devoted to setting extremely deep longlines. Each of these sampling lines take many hours, as we have to slowly reel out over 3 miles of line, give it time to sink, soak, and then reel it back in.   The line that we put out today is even a bit longer than usual, because I got to be in charge of “slinging” the hooks onto the line and I was not very fast at getting the four different sizes of hooks ready

Grenadier fish Kevin.jpg

A Mexican grenadier fish

. Have I mentioned how patient everyone is with the “Teach” aboard?

This morning we pulled up 97 empty hooks from 1250 meters before we caught the amazing grenadier fish! It suffered barotrauma, which is a nicer way of saying that its eyes and swim bladder inflated like balloons from the inside as it was hauled up from the high pressure depths.

One of the scientists onboard studies ocean food chains by examining the contents of fish stomachs. The stomach of the Mexican grenadier fish contained a fully intact armored shrimp!

Personal Log

Today I took advantage of the calm, calm seas to try the workout equipment onboard. They have all kinds of gear to help folks stay active and work off the delicious food in the galley. There is a rowing machine, stationary bike, weight bench, Jacob’s ladder, and elliptical. I used the elliptical machine because it was way too hot on the upper decks to use the exercise bike. Even with the very calm seas, there is a little bit of rolling, which made it an extra challenge for me keep it going!

Kids’ Questions of the Day

These questions about the Oregon II are from Harmony elementary students:

  • How big is the boat?       How tall? How long?

The boat is 175 feet long and 80 feet tall.

  • How much does the boat weigh?      

The boat weight is 800 tons. This is not how much the boat would weigh if you put it on a scale, but how

survival suit.jpg

TAS Emily Sprowls dons a survival suit

much weight the boat can carry if it were loaded full of cargo. We are not carrying nearly that much weight because a lot of the space on the boat is for equipment and for scientists and crew to live aboard.

  • How fast can it go?

Typically, the boat can go about 10 nautical miles per hour using both engines. She can go a little faster if the wind and current conditions are just right.

  • What is the boat made of?

The boat is made of steel and aluminum.

  • What are the white balloon things on top of the boat?

The white domes cover satellite dishes for the internet and phone.

  • What are the poles on the boat for? Are there sails?

The two yellow poles on either side of the boat are the outriggers used to

CTD sensor.jpg

This array houses the Conductivity, Temperature, and Depth probe.

pull a wide trawling net, much like a shrimp boat. Scientists trawl the bottom to study benthic organisms, including shrimp, but also sponges, crabs and bottom-dwelling sharks.

  • What new technologies does the boat have?

The Oregon II turns 50 years old this year!   It has been sailing the Atlantic Ocean since before I was born, but the crew is constantly fixing and replacing equipment on the boat. Even though she is old, she is very safe and reliable. Nevertheless, we still have to prepare for emergencies, including the possibility of needing to abandon ship while wearing the goofy-looking, but life-saving survival suits.

 

StyrofoamCup

Styrofoam Cup Test!

Scientists have brought new technology on board, including plenty of computers to collect, sort, store and analyze all the data we collect. One of the computers is connected to a device called the “CTD” with a set of sensors for Conductivity, Temperature, Depth and Dissolved Oxygen. Today the CTD went all the way to about 1100 meters (3700 ft.), and we tethered some styrofoam cups to the outside to subject them to the extreme pressure at that depth.