NOAA Teacher at Sea
Adrienne Heim Onboard NOAA Ship Albatross IV August 7 – September 2, 2007
Colorful sea stars!
Mission: Sea Scallop Survey Geographic Region: Northeast U.S. Date: September 2, 2007
Science and Technology Log: Ocean Diversity
Contrary to my initial thoughts, there is an eclectic amount of diversity AND color among the species that dwells within the Georges Bank/Nantucket Shoals. I have been very surprised at the amount of species we collect during our tows. I also am very surprised by the variations of color among the starfish. I just typically associated marine color to warm saltwater dwelling creatures where you would find coral reefs and such, but there is a beautiful array of colors up here. Among the typical sort of sea life you would expect to see here, like dolphins, whales, cod, crabs, sea scallops, clams, tuna etc. there exists a greater level of diversity here. Just to give you an idea, here is a list of some of the marine life we have encountered at our stations:
Monkfish brought up in the survey
Winter Skate
Little Skate
Silver Hake
Red Hake
Fourspot Flounder
Yellowtail Flounder
Windowpane Flounder
Gulfstream Flounder
Longhorn Sculpin
Ocean Pout
Cancer Crab
Sea Scallop
Atlantic Hagfish
Fourbeard Rockling
American Plaice
Moustache Sculpin
Alligator fish
Northern Sandlance
Spoonarm Octopus
Goosefish
Loligo Squid
Sea Raven
Asterias Boreal
Fluke
Northern Searobin
Rock Gunnel
American Lobster
Leptasterias Tenera
Alligator Fish
Butterfish
Seacucumber
and many more…
NOAA Teacher at Sea
Adrienne Heim Onboard NOAA Ship Albatross IV August 7 – September 2, 2007
The CTD, recording information at depth
Mission: Sea Scallop Survey Geographic Region: Northeast U.S. Date: August 27, 2007
Science and Technology Log: CTD Casts
Immediately following the fire and abandon ship drills, we proceeded to have a debriefing regarding appropriate and professional behaviors, as well as, receiving information regarding shift schedules, meals, work expectations, etc. Our Chief Scientist, Victor Nordahl, informed us of the various duties and responsibilities each of us would have during the Sea Scallop Survey. I was paired with another volunteer, Shawn, to help with the measuring of the sea scallops once they were sorted and weighed. I was also assigned the role of performing CTD casts and collecting data from the inclinometer.CTD casts are performed at every third station. The acronym stands for conductivity, temperature, and depth. It is a hefty contraption that is hooked onto a cable and sent down, a vertical cast, into the water. Basically, while the CTD is sent down vertically, it records the temperature, depth, salinity, and pressure. The saltier the water, the more conductivity is generated. The cast first soaks for about one-two minutes at the surface of the water to record the salinity. It is then sent down, stops about 5-10 meters before reaching the bottom of the ocean floor and then is hauled back. Recording this data is essential for scientists, especially while conducting a Sea Scallop Survey; because the CTD casts helps to associate water temperature and salinity with sea scallop abundance. Scientists record the data to view it later and assess the casts with the other data collected from the work stations.
Computers and cameras recording information from the CTDThe winch at the back of the shipCommunicating with the winch operator
NOAA Teacher at Sea
Amy Pearson
Onboard NOAA Ship Delaware II August 13 – 30, 2007
Mission: Ecosystem Monitoring Survey Geographical Area: North Atlantic Ocean Date: August 27, 2007
A full moon over the Gulf of Maine
Weather Data from the Bridge
Air temp: 15.6
Water temp: 15.1
Wind direction: 003
Wind speed: 12 kts
Sea wave height: 2-3 ft.
Visibility: 10+
Science and Technology Log
What a gift. After what seems like many days of fog, it is a perfect day in the Gulf of Maine. I witnessed it at about 1:30 a.m. from the bridge where I went to photograph a full moon from the “darker” end of the ship. The deck where we work (stern) is well lit all night, so there is light pollution. The reflection of the moon on the water is hard to reproduce in a photo, but worthy of the attempt. The air has also cleared, replaced with dry, crisp Canadian air, and as a bonus, the seas are calm. After a good six hour sleep I head to the deck for what I think is the best morning yet. Clear skies with visibility that seems infinite, deep blue water with barely 1 ft. waves, and a gentle breeze mark the morning hours. The air feels so clean, almost brand new.
Shearwaters are gliding onto the top of the water and dunking their head in for a quick taste. It is the first time I’ve see herring gulls at sea in at least a week. There are large mats of yellowish sargassum floating in the water. There have been humpback whales spotted but I haven’t seen them yet. It is still quite deep here, about 200 meters. The plankton samples contain a lot of Calanus which is almost a salmon color and appears like small grains of rice in the sieve. It is a tiny crustacean, and food for so many large organisms…a favorite of young cod. I was late for breakfast but had some freshly cut honeydew melon, toast and cheese. Some warm coffee cake was soon put out. I’m so lucky to have this great experience. I spotted a grey triangular shaped dorsal fin in the water. It was quite wide at the base and a lighter grey near the top. It appeared twice then disappeared. Claire on the bridge confirmed sighting, a Mola Mola, a large sunfish.
On one side of the ship – a lunar eclipse, the sun was rising on the other
Today is such a spectacular weather day. The Chief Steward pulled out the barbecue grill and charcoals were lit late in the afternoon. He added some hickory wood and grilled steaks and tuna. What a feast! We took samples in the Gulf of Maine today and tonight. They were a salmon pink color due to the calanus but contained a mix of zooplankton including amphipods, glass shrimp, and a few large, clear jellyfish. I preserved a jar from the baby bongo net for my students. Because I work into Tuesday morning, I wanted to include a special event on 7/28 at about 4:50 a.m. There was a lunar eclipse going on one side of the ship and a gorgeous sunrise on the other. Photos of both are below, as well as the moon rise the evening of 8/27, above.
Thanks to Kim Pratt, a fellow teacher, & Jerry Prezioso, a NOAA scientist.
A Shipboard Community
Nineteen people living aboard a ship, working twenty-four hours a day, seven days a week for seventeen days. A very unique community. Thirteen of them are there to support the scientific research of four science staff and to maintain the ship for its use as a scientific research vessel. The four-man deck crew maintains the ship and runs the heavy equipment for the scientists. The four-person NOAA Corps staff navigate, drive and manage the ship. They re-adjust courses when conditions force a change, deal with fog and rough seas, lots of other boats that want to be in the same place we do, and make sure everyone has their needs met. The two-person kitchen staff feeds this team of nineteen as they work on twenty-four hour shifts. Good food is so important on a ship. The Four-person engineering team seems to stay behind the scenes (below deck!) and keep all systems running like clock-work. Last, but certainly not least is the electronic technician, a genius with anything that has wires. He told me the favorite part of his job is problem-solving, and quite frankly, that is what is required of him each day. From email to satellite TV reception to the electronics in the winch, he is constantly fixing new problems or finding ways to make things work better. Each person has a different background and reason for being here.
Thanks to Betsy Broughton, also a scientist.
The age range of the members of this community begins at 23 and goes to the upper 50’s. The key to a good working ship is respect, consideration, and cooperation between people. There are many personal stresses on everyone, from lack of personal space, lack of sleep, seasickness, little contact with family, and inability to “go home”. In addition, each person needs to think of the needs of others so as not to disturb them or make their jobs any harder than they already are. This may seem like a utopian ideal. I suspect it is achieved on many vessels, though I can only speak for the DELAWARE II. What a great team to work with. Thank you for your support.
Teachers Kim Pratt and Amy Pearson say thanks to the crew of the DELAWARE II.
NOAA Teacher at Sea
Amy Pearson
Onboard NOAA Ship Delaware II August 13 – 30, 2007
Mission: Ecosystem Monitoring Survey Geographical Area: North Atlantic Ocean Date: August 25, 2007
Teachers Amy Pearson and Kim Pratt deploy a drifter buoy
Weather Data from the Bridge
Latitude: 4130 Longitude: 6650
Air temp: 17.8
Water temp: 16.7
Wind direction: 220
Wind speed: 16 kts.
Sea wave height: 2 ft.
Visibility: 4 nm
Science and Technology Log
Woke to another foggy day, though the air temperature is warm (18.6 at 1:30 p.m.). When a humid air mass hits the cooler Gulf of Maine water, fog results. At about 1 p.m. we got a call from the bridge saying we just crossed into Canada – could we see the line in the water? (everyone has a sense of humor here). Yesterday we decorated the surface drifter buoy that will send location, air and water temperature data to a satellite. Our school logos and websites are written on the buoy as well as the message “leave in the water”. NOAA will post this data on the Internet for anyone to track. Today we will deploy the buoy. Our school communities can watch this for over 400 days! Deployment went well, but the cloth drogue (holey sock) came apart and seemed to disappear below the buoy. We wore inflatable life vests and were tethered to the boat when we tossed the buoy off the ship.
Amy and Kim decorate the buoy for launch
Shortly after this, we took a plankton sample and as the net was coming up, I spotted some pilot whales about 40 ft. off the starboard side of the ship. There were six together, then another group appeared off the stern. They seem to stay very close together. Length was approximately 12-16 feet. They seemed to enjoy riding the stern waves. They were very cute, as the photo below shows.
Science Topic
This cruise is called an Ecosystems Monitoring Cruise. They happen four times per year, during January, May, August and November. Additional data to support this data set is collected on Fish Survey Cruises that occur in March, April, September and October. As I said in an earlier log entry, its mission is to assess changing biological and physical properties which influence the sustainable productivity of the living marine resources of the mid-Atlantic Bight, southern New England, Gulf of Maine and Georges Bank portions of the northeast continental shelf ecosystem.
Amy Pearson with a harness connecting with ship for buoy deployment.
The plankton that is collected and analyzed must be collected in the same exact manner during each cruise in order to compare it from season to season and year to year. The constant materials used are identical 61 cm diameter Bongo Nets with mesh size of 335 microns. The net is towed at a constant speed of 1.5-2 knots, 5 meters from the bottom or to a maximum depth of 200 meters. The rate of release of the nets into the water is constant as is the rate of return. There is always a 45 kg weight at the end of the wire that the nets are clipped to. The angle of the wire with the water is maintained at 45 degrees. Keeping these parameters constant allows scientists to compare the net catches because the only variable is what is very enthusiastic and dedicated. Even when I offered to take over the hosing of nets at the end of his shift, his response was, “I live for this!” NOAA is fortunate to have so many dedicated scientists and employees who work at sea. This is definitely not like any job I’ve experienced. The challenges of life at sea make it not something everyone can do. Betsy Broughton, the other scientist aboard is also high energy when it comes to this work. She clearly loves every minute and enjoys sharing her knowledge with others. I have learned much from both of them.
A flowmeter in each net measures how much water passes into each net and its data is part of the equation when amount of plankton per amount of water is calculated. Jerry Prezioso has been involved with this project since the 1970’s and is very enthusiastic and dedicated.Even when I offered to take over the hosing of nets at the end of his shift, his response was, “I live for this!” NOAA is fortunate to have so many dedicated scientists and employees who work at sea. This is definitely not like any job I’ve experienced. The challenges of life at sea make it not something everyone can do. Betsy Broughton, the other scientist aboard is also high energy when it comes to this work. She clearly loves every minute and enjoys sharing her knowledge with others. I have learned much from both of them.
Pilot whale in the Gulf of Maine, following us. Others were underwater when I shot the photo!
NOAA Teacher at Sea
Adrienne Heim Onboard NOAA Ship Albatross IV August 7 – September 2, 2007
Working at night
Mission: Sea Scallop Survey Geographic Region: Northeast U.S. Date: August 24, 2007
Science and Technology Log: Sample Sorting
It is then time to get to work. Each of us works in 12 hour shifts. We are either designated to a noon-midnight shift or visa-versa. First, the winch operator sends out the dredge. It trolls in 15 minute increments and collects everything that it encounters along the way. This includes various marine life, vegetation, and bottom sediment like rocks and sand. Once it is brought to surface the deck handler’s work with the winch operator to lower the dredge to the middle of the stern. The dredge is emptied of its contents and then it is our turn to sift through it. The marine life is sorted into blue buckets according to their species. Our Watch Chief teaches us how to identify them, especially when sorting Winter versus Little Skates or Winter versus Yellow-Tail Flounders. We put all of the scallops into large orange baskets. The species are then weighed and measured. We work in pairs and each pair is assigned to one of the three work stations. The data is recorded into the FSCS, which stands for Fisheries Scientific Computer System. Some of the scallops are frozen for further scientific investigation while the others, as well as the other marine life collected from the dredge are put back into the water. The buckets are washed and stored for the next tow, which occurs every 45 minutes as we wait to reach the following station.
Sorting baskets
I am learning so much and I can’t wait to bring all of this information back to my students. My next log will discuss the diversity of the marine life here along the Georges Bank and Nantucket Shoals, as well as, the purpose of the FDA sending employees to test for PSP (Paralytic Shellfish Poison) within the meat, viscera, and gonads of the sea scallops.
QUESTIONS OF THE WEEK FOR MY STUDENTS:
What preys upon sea scallops besides starfish?
How are the open and closed waters designated and determined?
What is the impact of scallop fishing on the overall ecosystem?
