NOAA Teacher At Sea
Aboard the R/V Hugh R. Sharp
June 27 — July 7, 2013
Mission: Sea Scallop Survey
Geographical Area of Cruise: Northwest Atlantic Ocean
Date: June 29, 2013
Science and Technology Log:
Most of the shifts consisted of sorting out the animals from the dredges and carrying out the process of weighing, measuring and counting. One other component to the process is that on every dredge, five of the scallops are scrubbed, weighed and dissected. Once this is done, gender can be determined since this species of sea scallops have separate sexes. Then each scallop is numbered, labeled, tagged, and bagged. These five sea scallops will be brought back to the lab on land to be analyzed and aged. This is done by counting growth rings on the shell. The part of the scallop that is used as food is not the actual animal but the adductor muscle that is located in the middle of the shell. This is the muscle that can open and close the scallop’s shell. This is the only bivalve to be motile. Often times other organisms find a nice little resting spot inside of the shells of the scallops. This is a form of commensalism where the organism benefits while not harming the host. We saw a small red hake living inside the shell of a dissected sea scallop.
After every other dredge, the crew brings out the CTD which is an apparatus that collects conductivity, temperature, and depth. This data enters the database and is used in the labs on shore. We could always tell when they were lowering the CTD because the ship had to come to a complete stop while collecting data. Then they would bring the CTD back in and the ship would resume forward.
Did you Know:
The male sea scallop’s gonad is white and the female’s gonad is red. Gonads are reproductive organs.
I learned the secret to gearing up efficiently with the boots and foul weather overalls from Larry. When you are ready to take them off, pull the overall part down toward the boots and leave about an inch of the boots exposed. Then just step out of the boots into regular shoes. I’m glad I brought some slip-on shoes which made things a lot easier. Then when it is time to gear up again, all I had to do was slip back into the boots and pull up the pants and suspenders. We also had to wear rubber work gloves that kept us from cutting ourselves during the dredges.
I interviewed our steward, Lee, for one of my requirements by NOAA. I found her to be a very interesting and social person. She is also the cook so she takes on two responsibilities at one time. She has to plan the meals, cook the meals and clean up after the meals. In addition to taking care of all kitchen duties, she also has to clean the heads (bathrooms), vacuum the carpets, clean the staterooms and do the laundry. She had to take some extensive courses on basic safety training for commercial vessels. Her satisfaction to the job is making food that people like and keeping up morale on the ship. She has a designated drawer which serves as a treasure chest of gold only the gold is actually tons of candy. All kinds of candy. She also keeps one big freezer full of ice cream and a refrigerator full of most types of can sodas.