HabCam – NOAA Teacher at Sea Blog

June 2, 2026June 2, 2026

Mandy Freeman: Be the Scallop In a Sea of Sand Dollars, May 26, 2026

view of the seafloor as seen by an underwater camera. the seafloor is densely dotted with small dark circles which are sand dollars. toward the top right of the image, there is a single larger circle of a lighter orange-brown color: this is the scallop.

NOAA Teacher at Sea

Mandy Freeman

Aboard NOAA Ship Henry B. Bigelow

May 19 – May 29, 2026

Mission: Sea Scallop HabCam Survey

Geographic Area of Cruise: Northeast Atlantic Ocean

Date: May 28, 2026

Weather Data from Georges Bank
Latitude: 41° 59. 926′ N
Longitude: 067° 11. 176′ W

Science and Technology

Why survey scallops? The fishery stock assessments study the size and age composition of approximately 40 fish and invertebrate species in the New England/Mid-Atlantic area. This data informs stakeholders and policymakers of the abundance of each species, the impact of the fishing industry, and evaluates biological aspects of the ecosystem. (Fishery Stock Assessments in New England and the Mid-Atlantic) The data collected by NOAA and other sources (including commercial and recreational fishermen) is then used to determine sustainable harvest levels for each species (See graphic below). Find more information HERE.

This image has four sections with arrows to show the progression from data analysis to stock assessments to management advice to healthy fish stocks. Commercial data, recreational data, and scientific data inform stock assessments and are represented by outlines of the three different types of vessels. Stock assessments answer questions including, “How are the stocks doing now?” and “What are the future projections?” and this section has outlines of fish and a fishing net. Stock assessments inform management advice, the next section, with icons for licenses/permits, fishing seasons, gear, quotas, and size limits. The final section and overall goal is “healthy fish stocks” with line drawings of fish on a plate for sustainable seafood, fish below a fishing vessel to represent future jobs, and a squid, lobster, and urchins to represent healthy oceans and marine life. — An infographic shows the progression from data analysis to stock assessments to management advice to healthy fish stocks. Commercial data, recreational data, and scientific data inform stock assessments. Stock assessments answer questions including, “How are the stocks doing now?” and “What are the future projections?” Stock assessments inform management advice. The final section and overall goal is “healthy fish stocks” which provide sustainable seafood, future jobs, and healthy oceans and marine life.
Credit: NOAA Fisheries

How is this survey conducted? The Atlantic Sea Scallop survey has four main components: dredge, trawl, a long-range autonomous underwater vehicle (AUV), and Habitat Mapping Camera (HabCam).
– A dredge has a metal frame with a chain-mesh bag that collect scallops off the sea floor, like raking leaves in your yard.
– The trawl uses a net to scoop up swimming scallops without digging into the sediment.
– The HabCam, what I worked with on this survey, is a boat-towed camera system that takes continuous paired photos, 5-6 pairs per second, as it moves through the water (NOAA survey preparation materials).
– The Autonomous Underwater Vehicle (AUV), “Stella,” has the same camera system as the HabCam, but can be programmed to operate without a human pilot.

(Read this for more details: Long-Running Sea Scallop Survey Diversifies for the Future)

“Approximately 4 million images of the ocean bottom are collected during an annual survey. Humans are annotating about 1 in 50 of the images.” (NOAA Fisheries)

What is a HabCam? Watch THIS VIDEO!

What do the HabCam images LOOK like? The HabCam system captures high-resolution images and transmits them to a computer for processing and annotating. This is what that looks like from the pilot station:

NOAA HabCam Live Image Capture during Scallop Survey

Can you guess what these images are? Some examples of images captured by HabCam!

octopus well-camouflaged on the seafloor, as seen by an underwater camera — HabCam Image 1

lobster, visible as a dark silhouette, on the seafloor next to a rock, as seen by underwater camera — HabCam Image 1

What areas were sampled? NOAA uses past data to determine the sampling tracks. This was what our survey track looked like for this trip.

Planned Scallop Survey Track – Credit: Preparation Materials NOAA Fisheries

photo of a computer monitor displaying the live track patterns of NOAA Ship Henry B. Bigelow overlaid on a nautical chart. The track travels mostly in straight lines north and then south, slowly making its way east. — Live Track Pattern

The Atlantic Sea Scallop Management Program is broad and complex, involving many different aspects of research, management, and monitoring. You can read more about it at the NOAA Sea Scallop Management page.

Personal Log

On NOAA Ship Henry B. Bigelow, there are both two- and four-person staterooms. Megan and Kristen are on day shift, so I usually only see them during watch changes. Sandy, however, is on night shift with me.

portrait of a woman wearing a brown coat and a navy beanie, smiling straight at the camera for a photo. behind her, we see a green field extend down to a line of trees along a shoreline; beyond the trees, blue water; and on the other side of the water, golden fields. — Sandy Sutherland, Research Fishery Biologist. Photo courtesy of Sandy Sutherland.

Sandy Sutherland is a research fishery biologist at the Northeast Fisheries Science Center. She earned a bachelor’s degree from Eckerd College and a master’s degree from University of Rhode Island Graduate School of Oceanography. She started her career as an outdoor educator with Nature’s Classroom.

At the Northeast Fisheries Science Center Woods Hole lab, Sandy conducts age determinations for haddock and Atlantic mackerel and measures growth rings for sea scallops. Using a dissecting microscope, she determines the age of fish earbones (otoliths) — a process she says feels a bit like playing a video game. She also conducts research related to age determinations and created Excel templates used to calculate measures of age precision.

She says important skills for this type of work include paying close attention to detail, writing legibly, and being able to see how all the pieces fit together to understand the “big picture.”

When she’s not working, Sandy enjoys birding, reading, and volunteering at science fiction conventions such as Readercon. Although she can’t choose a favorite bird, she says she would be especially excited to spot any species of albatross.

Did you know sea scallops can swim?

They rapidly clap their shells together to move away from predators, like sea stars. And we can actually “see” this from the HabCam images! In the image below, the sea scallop appears to be swimming away from a predator. A swimming scallop can be identified by the two dark “shadows” visible on either side of it. Can you see the predator???!

an underwater view of an orange and yellow scallop captured in motion above the seafloor. we can see a couple sand dollars and a purple sea star resting on the seafloor. — Swimming Sea Scallop from HabCam

Careers at Sea

Jonathan kneels on an old wooden dock, holding a fish in two hands and smiling for the camera. a yellow fishing pole rests in front of his knees. behind him is gray-blue water, specks of small boats, and a distant tree-lined shore. — Jonathan Duquette, Biological Science Technician. Photo courtesy of Jonathan Duquette.

Meet Jonathan Duquette, a Biological Science Technician with the Ecosystems Surveys Branch at the NOAA Northeast Fisheries Science Center. He specializes in shellfish surveys involving Atlantic sea scallops, Atlantic Northern Shrimp, Ocean Quahogs, and Atlantic Surfclams. Jonathan plays an integral role in critical research initiatives, including the high-resolution HabCam (Habitat Camera Array) and sea scallop dredge surveys. His work at sea and ashore supports the rigorous monitoring, data analysis, and ecological assessments essential for sustainable fisheries management and marine ecosystem conservation in the Northeast.

Jonathan has had a lifelong obsession with the sea, sharks, and fishing since an early age. After graduating with a BS in Marine Biology from the University of New England, Jonathan became a fisheries observer collecting data for the federal government on vessels in Alaska. After working as an observer on King Crab fishing vessels (think TV’s “Deadliest Catch”), longline vessels, and Scallop fishing vessels, he returned to the East Coast where he worked as a sternman on lobster fishing vessels in Boothbay Harbor Maine. In 2003, Jonathan joined the Ecosystems Surveys Branch at NOAA’s Northeast Fisheries Science Center, a role that continues today.

I asked him if he had any advice for “his younger self.” He said, “I’d tell myself that persistence pays off, and that you’re really never gonna be done learning, it’s a lifelong pursuit. Don’t be afraid of making mistakes, that’s part of the journey.”

Fun fact: While on a research cruise in 2024, Jonathan and other scientists discovered an ice-age jawbone from a Walrus, off the coast of Virginia! Read about his exciting discovery HERE!

a thick curved bone, smooth and white in some areas and dark and degraded in others, sits on a white table surface in a lab. in the background we can see typical lab equipment: a sink, chemicals, etc. — The right jawbone of a walrus, possibly thousands of years old, discovered during a NOAA dredge survey in 2024. Credit: NOAA Fisheries/Jonathan Duquette

Zach wears a baseball cap, a black hoodie sweater, and orange foul-weather gear coveralls. he stands, hands in pockets, for a photo at the foot of a ramp or gangway leading down from an old wooden shack covered in fishing floats. — Zach Fyke, Biological Science Technician. Photo courtesy of Zach Fyke.

Meet Zach Fyke, he is a Biological Science Technician with the Northeast Fisheries Science Center Ecosystems Survey Branch. He graduated from Michigan State University in 2017 with a degree in Fisheries and Wildlife. After college, he began his marine science career as a fisheries observer based out of Point Judith, Rhode Island, before taking on several positions within NOAA Fisheries. Today, he primarily works on shellfish surveys involving Atlantic sea scallops, Atlantic Northern Shrimp, Ocean Quahogs, and Atlantic Surfclams.

Interestingly, Zach originally planned to be an educator, but after an elective Intro-Biology course, he found himself declaring into the major of Fisheries and Wildlife. Near the time Zach was graduating with a degree in Fisheries, a college professor at Michigan State University, who had worked at the Woods Hole lab in the 90’s, encouraged him to “try somewhere new for a few years.” This was a driving factor on why Zach moved to the East coast to begin a career in Marine Fisheries. Zach describes himself as an “average student,” but says he always enjoyed hands-on activities and learning by doing. That passion for fieldwork and adventure eventually led him to a career at sea.

His advice to students interested in science careers is simple: don’t be afraid to move away and try something new. Some of the best opportunities are found outside of your comfort zone.

When he’s not working, Zach enjoys photography and has recently started photographing birds. He jokes that birding is a lot like “real-life Pokémon.” His favorite bird is the Belted Kingfisher.

Personal Reflection

Scallops may blend into the seafloor until they suddenly swim off in a burst of movement — a fitting reminder that sometimes growth happens when we are willing to move beyond what feels comfortable. Whether it’s learning to annotate images, transitioning to night shift, or piloting the HabCam, this journey has been a reminder to BE the Scallop in a sea of sand dollars.

May 26, 2026May 28, 2026

Mandy Freeman: Life Between Sunrises and Humpbacks, May 24, 2026

NOAA Teacher at Sea

Mandy Freeman

Aboard NOAA Ship Henry B. Bigelow

May 19 – May 29, 2026

Mission: Sea Scallop HabCam Survey

Geographic Area of Cruise: Northeast Atlantic Ocean

Date: May 24, 2026

Weather Data from 13 miles due East of Monomoy Point, Massachusetts
Latitude: 41 32.7776 ° N
Longitude: 069 42.0435 ° W
Wind Speed: 12.5 knots E
Air Temperature: 10.5 °C (50.9°F)

Science and Technology Log

The Habitat Mapping Camera System (HabCam) has been taking LOTS of pictures of the life near the sea floor. As part of the nightshift, my duties include annotating the HabCam images, driving the HabCam vehicle as Pilot, and serving as Co-Pilot.

Annotating images involves identifying and measuring scallops, as well as identifying other animals like round fish, flat fish, skates, crabs and whelks.

As Co-Pilot, there are several monitors with varying data from both the ship and the HabCam that must be watched in order to see obstacles on the path to avoid a collision. The depth of the HabCam is controlled by a “joy stick” that deploys and retracts the cable attached to the frame surrounding the HabCam. Ideally the camera should be kept within 2 meters from the ocean bottom.

As the Pilot, I must constantly monitor and adjust for the ever-changing distance from the seafloor to keep the HabCam from touching bottom. Some areas are easy to navigate, while others are rocky with “surprise” boulders.

BEFORE Annotations

National Oceanic and Atmospheric Administration (NOAA) places a strong emphasis on producing reliable, standardized research data, so I was required to watch a training video, pass a verbal quiz, and then take a 200 image test to ensure my annotations met those standards.

view of a desktop computer at a workstation. we cannot really interpret anything on the screen. a sea scallop shell rests on the table off to the side. — Training and a test before I could annotate images

screenshot of an underwater view of a scallop on the seafloor — Live Sea Scallop from training session

Mandy sits at a corner desk with an array of computer monitors and a control panel with a joystick. she faces the screens intently as she grips the joystick with her right hand — Mandy piloting the HabCam

Mandy stands on deck in front of the HabCam, a large apparatus housing underwater cameras. she wears an orange hard hat and orange life vest. — Mandy standing on deck with the HabCam

Drifter Buoys

Through NOAA’s Adopt a Drifter Program, I also had the opportunity to deploy two drifter buoys while aboard the NOAA Ship Henry B. Bigelow. The mission of this program is “to connect classrooms around the world with NOAA data, and provide a real-life, interactive classroom experience to teach students about ocean science” (Adopt a Drifter Program). After decorating the buoys, we deployed both buoys from the starboard side of the ship at 5:21 AM and 5:22AM on Friday, May 22, 2026. As soon as I have a link to track them, I will post here!

If you or your school would like to adopt a drifter buoy, you can find out more information HERE.

Lewisville High School side of buoy

close-up of the buoy portion of the drifter showing the orange outline of a cat's paw and the words "c/o 1998, 2020" — Clemson University side of buoy (Mandy is a 1998 & 2020 graduate of Clemson)

close up of the buoy portion of the drifter showing a sticker of the state of South Carolina with a moon and palm tree from the state flag, and a NOAA Teacher at Sea Program sticker — Representing Mandy’s home state of South Carolina and the NOAA Teacher at Sea Program

three people stand on the deck of ship, in front of the railing, at sunrise. Mandy is in the center. Andrew and Tommi to her left and right each hold up a heavy drifting buoy, which consists of the float, cable, and folded up drogue. All three wear hard hats and life vests. — Andrew Merlino (Survey Tech) and Tommi Truong (Able Seaman) assisted Mandy in the deployment of the buoys (Image courtesy of Kristen Jabanoski)

Mandy and Tommi, wearing hard hats and life vests, stand at the railing of the ship at sunrise and watch as the drifting buoy flies through the air toward the water. Tommi's arms are still extended from tossing. With low lighting, this photo is a little out of focus. — Deployment (Image courtesy of Zach Fyke, NOAA Watch Chief)

view of the drifting buoy in the water: a round blue and white float, attached to a cable, attached to a folded "drogue" or fabric tail. the cardboard packaging will dissolve and allow the drogue to extend. we can just barely see the Lewisville High School sticker. — Buoy In (Image courtesy of Zach Fyke, NOAA Watch Chief)

Personal Log

Ship living isn’t all that bad, but night shift has been an adjustment! I am in a stateroom with three other ladies; two of us are on night shift (11:30 PM – 11:30 AM) and two are on day shift (11:30 AM-11:30 PM). When you leave for watch, it is common courtesy to NOT return to the stateroom when your bunkmates are sleeping. *It’s a good idea to set your things out before going to bed so your essentials aren’t left behind!*

close up view of a single lower stateroom bunk. we can see a nightlight mounted to the wall, a curtain drawn aside, and the ladder up to the top bunk

view of lockers in the stateroom, with luggage and backpacks visible on the floor in front of them.

view of a small desk and chair tucked next a locker in the stateroom. above the desk is a window with blackout curtains.

view of four bunks, stacked in pairs, in the shared stateroom. each bunk has its own curtain. we can also see a sink and a locker.

view of the head (bathroom) with toilet, shower, sink

My stateroom: four berths, storage lockers, desk, head

What day is it? Not really sure…But I have thoroughly enjoyed getting to know the crew and learning how the HabCam collects images of sea life and how NOAA uses this data to inform the local fisheries. More about the crew later!

I’ve had the opportunity to see some amazing sunrises…

view of sunrise over the railing of NOAA Ship Henry B. Bigelow. the water is calm and gray. an orange sun peeks over low gray clouds and illuminates parts of the horizon; it adds a golden tinge to the otherwise gray water

view over the railing at calm gray waters, cloudy gray skies, but a riotous streak of neon red-orange right at the horizon

And today, we had the honor of watching humpback whales while SNOW fell!

All humpback whale images courtesy of Zach Fyke.

Did You Know?

The Humpback whale can weigh up to about 40 tons, grow to around 60 feet (18 meters) long, and live roughly 80–90 years. They are known for their long migrations, complex songs, and acrobatic behaviors such as breaching and tail slapping. Humpback whales are found in oceans worldwide and feed mainly on small fish and krill (Humpback Whales – NOAA). They are also called the “singing whale,” because the male mating song can change from year to year and can last as long 30 minutes (Fun Facts About Wonderful Whales).

Although humpback whale populations are increasing, they remain on the endangered species list. Their greatest threats include entanglement in fishing gear and marine debris, vessel strikes, harassment from boats, ocean noise, and changing climate conditions (Humpback Overview – NOAA).

Did you know different animals (and fish) make specific sounds? Watch the following video to learn more about how NOAA Fisheries uses Passive Acoustic Monitoring to study not only the humpback whale, but many different types of sea life! Listening for Whales. Visit the NOAA Mammals: Sounds in the Ocean site to hear the differences between 32 mammals including the humpback whale and the minke whale!

Careers at Sea

portrait of a man in a fleece with a shoulder bag strap standing at a ship's railing at sunrise or sunset — Rhett Finley, NOAA Passive Acoustics Branch in the Northeast
(Credit Rhett Finley)

Meet Rhett Finley, a fieldwork team lead from the NOAA Passive Acoustics Branch in the Northeast. Rhett grew up in Tulsa, OK and developed a passion for science at just 6 or 7 years old. By the age of ten, he already knew he wanted to become a marine biologist, inspired by the nature documentaries he watched growing up. He later attended Texas A&M University at Galveston, where he earned a Bachelor of Science degree in Marine Biology.

When I asked Rhett how he became drawn to the field of bioacoustics, he said “it was because of its versatility and noninvasive nature and the ability to integrate it with other scientific disciplines, like genetics. This approach is an effective means of collecting detailed data on threatened species especially in remote or difficult to access areas and therefore can contribute to well-informed conservation management efforts for those species and their respective habitats.”

His job with the NOAA Fisheries Passive Acoustics Branch involves:
– placing underwater microphones (hydrophones) in designated areas, such as wind farm areas and marine sanctuaries
– assists with analyzing and interpreting acoustic data, which is visualized in the form of spectrograms (picture below).

His current focus is on the minke whale (Balaenoptera acutorostrata). More information on this whale found here. The goal of this NOAA division is to “use passive acoustic technologies to study the behavior and movements of marine animals, their contribution to the ocean soundscape, and how they are affected by human-made sounds” (Passive Acoustic Research in the Northeast)

a graph showing frequency (Hz) v time (m:ss). sounds show up as yellow or green markings against a darker purple background. annotations point out a humpback whale song (markings in a patter that extend the full length of the x-axis); North Atlantic right whale upcalls (a few vertical markings toward the left side of the x axis) and sei whale downsweep doublet (two curved downward markings toward the right side of the x-axis.) in the low frequency values there are a lot of scattered green markings from ship noise. — Spectrogram showing unique calls by multiple species including humpback whale song, North Atlantic right whale upcalls, and a sei whale downsweep doublet with low-frequency ship noise overlapping.
Credit: NOAA Fisheries

Interested in this type of career? NOAA offers internships to both undergraduate and graduate students, as well as high school students! Check out the opportunities and scholarships available HERE!

For more information and great pictures, check out the NOAA Fisheries New England/Mid-Atlantic Facebook page! Or their Instagram page.

June 24, 2016April 22, 2021

Donna Knutson: Last Leg of Leg III Atlantic Sea Scallop Survey 2016, June 24, 2016

NOAA Teacher at Sea Donna Knutson
Aboard the Research Vessel Sharp
June 8 – June 24, 2016

2016 Mission: Atlantic Scallop/Benthic Habitat Survey
Geographical Area of Cruise: Northeastern U.S. Atlantic Coast
Date: June 24, 2016

Last Leg of Leg III Atlantic Sea Scallop Survey 2016

Mission and Geographical Area:

The University of Delaware’s ship, R/V Sharp, is on a NOAA mission to assess the abundance and age distribution of the Atlantic Sea Scallop along the Eastern U.S. coast from Mid Atlantic Bight to Georges Bank. NOAA does this survey in accordance with Magnuson Stevens Act requirements.

Science and Technology:

Latitude: 41 29.84 N

Longitude: 070 38.54 W

Clouds: partly cloudy

Visibility: 5-6 nautical miles

Wind: 3.58 knots

Wave Height: 6 in.

Water Temperature: 53 F

Air Temperature: 67 F

Sea Level Pressure: 30.0 in of Hg

Water Depth: 26 m

It has been an action packed two weeks. The men and women who dedicate themselves to the scallop survey are extremely hard working scientists. It is not an easy job. The sorting of the dredged material is fast and furious, and it needs to be in order to document everything within the catch before the next one comes in. The baskets are heavy and it takes a strong person to move them around so quickly.

DSCN8159 (2) dredge team — Han, Jill, Mike, Vic, Me and Ango

In small catches every scallop is measured. In dredges with many baskets of scallops, a percentage is measured. It is a random sampling system, taking some scallops from each of the baskets to get a general random sample of the whole. Mike led an efficient team, he told us what to look for and oversaw the measuring.

DSCN7780 (2)mike and nicki — Mike and Nikki

He often set samples aside to show me later, when we were not as busy. A few examples were how to tell the difference between the red and silver hake or the difference between the Icelandic and Atlantic sea scallop. He showed me how the little longhorn sculpin fish, “buzz bombs” known to fisherman, vibrate when you told it in your hand.

Mike even took the time to dissect some hake and to show me the differences in gonads, what they were feeding on by opening their stomach, and the otolith within the upper skull. The otolith is a small bone in the inner ear that can be used to identify and age the fish when in a lab looking through a microscope. Mike answered my many questions and was always eager to teach me more.

Another helpful team member was Vic. Vic taught me how to run the HabCam. He has been involved in the HabCam setup since it started being used four years ago. There is a lot of work to do to set up the multiple monitors and computers with servers to store all the images collected by the HabCam. Vic overlooks it all from the initial set-up to the take down. I admire Vic’s work-ethic, he is always going 100% until the job is completed. Sometimes I just needed to get out of his way, because I knew he was on a mission, and I didn’t want to slow him down.

DSCN8132 (2) monitors — Control center for Habcam and Dredging

When we weren’t dredging, but rather using the HabCam, there was a pilot and copilot watching the monitors. The HabCam, when towed behind the ship, needs to be approximately 1.7 m off the ocean floor for good resolution of the pictures, and keeping it at that elevation can be a challenge with the sloping bottom or debris. There is also sand waves to watch out for, which are like sand bars in a river, but not exposed to the surface.

When not driving HabCam there are millions of pictures taken by the HabCam to oversee. When you view a picture of a scallop you annotate it by using a measuring bar. Fish, skates and crabs are also annotated, but not measured. It takes a person a while to adjust to the rolling seas and be able to look at monitors for a long period of time. It is actually harder than anticipated.

DSCN7768 (2)skate — HabCam Picture of a skate.

Han was making sure the data was collected from the correct sites. She works for the Population Dynamics branch of NOAA and was often checking the routes for the right dredges or the right time to use the HabCam. Between the chief scientist Tasha and Han, they made sure the survey covered the entire area of the study as efficiently as possible.

DSCN7839 (2)tash han mike — Tasha, Han and Mike discussing the next move.

Dr. Scott Gallager was with us for the first week and taught me so much about his research which I mentioned in the previous blogs. Kat was with us initially, but she left after the first week. She was a bubbly, happy student who volunteered to be on the ship, just to learn more in hopes of joining the crew someday. Both vacancies were replaced by “Ango” whose real name in Tien Chen, a grad student from Maine who is working on his doctoral thesis, and Jill who works in Age and Growth, part of the Population Biology branch of NOAA. Both were fun to have around because of their interesting personalities. They were always smiling and happy, with a quick laugh and easy conversation.

DSCN8131 (2)the three — Jill, Ango and Han after dredging.

The Chief Scientist, Tasha, was extremely helpful to me. Not only does she need to take care of her crew and manage all the logistics of the trip, plus make the last minute decisions, because of weather or dredges etc, but she made me feel welcome and encouraged me to chat with those she felt would be a good resource for me. On top of it all, she helped me make sure all my blogs were factual. She was very professional and dedicated to her work, as expected from a lead scientist leading a scientific survey.

DSCN8146 (2)tash and jim — Evan, Tasha and Jimmy discussing route.

I spent as much time as possible getting to know the rest of the crew as well. The Master, Captain James Warrington “Jimmy” always welcomed me on the bridge. I enjoyed sitting up there with him and his mates. He is quick witted and we passed the time with stories and many laughs. He tolerated me using his binoculars and searching for whales and dolphins. There were a few times we saw both.

He showed me how he can be leader, responsible for a ship, which is no small feat, but do so with a great sense of humor, which he credits he inherited from his grandmother. The other captains, Chris and Evan, were just as friendly. I am sure all who have been lucky enough to travel with them would agree that the RV Sharp is a good ship to on because of the friendly, helpful crew and staff.

DSCN7785 (2)KG — KG, oceanic specialist, helped with dredges.

Because this was my second experience on a survey, the first was a mammal survey, I have really come to appreciate the science behind the study. It is called a survey, but in order to do a survey correctly, it takes months of planning and preparation before anyone actually gets on a ship.

There is always the studying of previous surveys to rely on to set the parameters for the new survey. Looking for what is expected and finding, just that, or surprising results not predicted but no less valued, is all in a scientist’s daily job. I admire the work of the scientist. It is not an easy one, and maybe that is why it is so much fun. You never know exactly what will happen, and therein lies the mystery or maybe a discovery to acquire more information.

DSCN8127 (2)big goose — I had to hold the largest goose fish we caught!

It was a challenging two weeks, but a time I’m so glad I had the opportunity to have with the members of Leg III of the 2016 Atlantic Sea Scallop Survey.

June 19, 2016April 22, 2021

Donna Knutson: Dredging, June 16, 2016

NOAA Teacher at Sea Donna Knutson
Aboard R/V Hugh R. Sharp
June 8 – June 24, 2016

2016 Mission: Atlantic Scallop/Benthic Habitat Survey
Geographical Area of Cruise: Northeastern U.S. Atlantic Coast
Date: June 16, 2016

Dredging

Mission and Geographical Area:

Science and Technology:

Latitude: 40 32.475 N

Longitude: 67 59.499 W

Clouds: overcast

Visibility: 5-6 nautical miles

Wind: 7.4 knots

Wave Height: 1-4 ft.

Water Temperature: 53 F

Air Temperature: 63 F

Sea Level Pressure: 29.9 in of Hg

Water Depth: 103 m

Science Blog:

Paired with the HabCam, dredging adds more data points to the scallop survey and also to habitat mapping. Various locations are dredged based on a stratified random sampling design. This method uses the topography of the ocean bottom as a platform and then overlays a grid system on top. The dredged areas, which are selected randomly by a computer program, allow for a good distribution of samples from the area based on topography and depth.

Vic and Tasha sewing up the net on the dredge.

A typical dredge that used for the survey is similar to those used by commercial fisherman, but it is smaller with a width of 8 ft. and weight of 2000 lbs. It is towed behind a ship with a 9/16 cable attached to a standard winch. Dredges are made from a heavy metal such as steel and is covered in a chain mesh that is open in the front and closed on the other three sides making a chain linked net made of circular rings.

A fisherman’s dredge has rings large enough for smaller animals to fall through and become released to the bottom once again. The dredge in a survey has a mesh lining to trap more creatures in order to do a full survey of the animals occupying a specific habitat.

There are three categories of catch received in a dredge: substrate, animals and shell. A qualitative assessment on percent abundance of each is done for every dredge. Not all animals are measured, but all are noted in the database.

A length measurement is taken for every scallop, goosefish (also called monkfish), cod, haddock, as well as many types of flounder and skate. A combined mass is taken for each species in that dredged sample. Some animals are not measured for length, like the wave whelk (a snail), Jonah crab, and fish such as pipefish, ocean pout, red hake, sand lance; for these and several other types of fish, just a count and weight of each species is recorded.

Other animals may be present, but not

counted or measured and therefore are called bycatch. Sand dollars make up the majority of bycatch. Sponges, the polychaete Aphrodite, hermit crabs, shrimp and various shells are also sorted through but not counted or measured.

All of the dredge material that is captured is returned to the ocean upon the required sorting, counting and measuring. Unfortunately, most of the fish and invertebrates do not survive the ordeal. That is why it is important to have a good sampling method and procedure to get the best results from the fewest dredge stations needed.

Goosefish, often called Monkfish, eat anything.

The dredge is placed on the bottom for only fifteen minutes. There are sensors on the frame of the dredge so computers can monitor when the collection was started and when to stop. Sensors also make certain each dredge is positioned correctly in the water to get the best representation of animals in that small sample area.

Entering the name of the animals to be measured.

Even with sensors and scientists monitoring computers and taking animal measurements, the dredging can only give a 30-40% efficiency rating of the actual animals present. Dredging with the aid of the HabCam and partnerships with many scientific organizations, along with data from commercial fisherman and observer data, create a picture of abundance and distribution which can be mapped.

Adductor muscle the "meat" of the scallop. This on is unhealthy. — Adductor muscle the “meat” of the scallop. This one is unhealthy.

In the scallop survey the emphasis is on where are the most scallops present and this aids fisherman in selecting the best places to fish. The survey also suggests where areas should be closed to fishing for a period, allowing scallops to grow and mature before harvesting.

This management practice of opening closed areas on a rotational basis has been accepted as beneficial for science, management, and fishermen. This method of balancing conservation and fishing protects habitats while still supplying the world with a food supply that is highly valued.

Personal Blog:

Being part of a dredging team is exciting. It is a high energy time from the moment the contents are dropped on the sorting platform to the end when everything is rinsed off to get ready for the next drop.

Katryn "Kat" Delgado — Kateryn “Kat” Delgado

I wanted to take pictures of everything, but with gloves on it was hard to participate and help out or just be the bystander/photographer. Kateryn Delgado from Queens NY, a volunteer/student/scientist/yoga instructor/photographer, was very helpful. She was involved in other surveys and often took pictures for me.

I did find it sad that the animals we sorting were not going to live long once returned to sea, but that is a part of the dredging that is inevitable. Raw data needs to be collected. After measuring, a percentage of the scallops were dissected to get their sex, abductor muscle (meat), and stomach. Shell size was compared to the meat and gonad mass and is also used to age the scallop. The stomach was removed to test for microplastics. Dr. Gallager and his research team are studying microplastics in the ocean. Scallops filter relatively large particles for a filter feeder, and therefore are a good species to monitor the abundance of plastics at the bottom of the ocean.

The weather has been nice, not very warm, but the waves are low. Just the way I like them. We are making our way back to Woods Hole to refuel and get groceries. I didn’t realize we would split up the leg into two parts. We should be in around 10:00 a.m. I’m going to go for a long walk since there is not a lot of opportunity for exercise on the ship. Hope it’s sunny!

June 15, 2016April 22, 2021

Donna Knutson: Atlantic Sea Scallop Research Progressed into Habitat Modeling, June 13, 2016

NOAA Teacher at Sea Donna Knutson
Aboard R/V Hugh R. Sharp
June 8 – June 24, 2016

2016 Mission: Atlantic Scallop/Benthic Habitat Survey
Geographical Area of Cruise: Northeastern U.S. Atlantic Coast
Date: June 13, 2016

Mission and Geographical Area:

Science and Technology:

Weather Data from the Bridge

Latitude: 40 43.583 N
Longitude: 67 04.072 W
Clouds: 50% cumulous
Visibility: 6 nautical miles
Wind: 296 degrees 11 knots at cruise speed of 6.5 knots
Wave Height: 1-3 ft.
Water Temperature: 52 ºF
Air Temperature: 56 ºF
Sea Level Pressure: 29.4 in of Hg
Water Depth: 107 m

Scientific Blog

During the 1970’s fishermen made the observation that the Atlantic sea scallop was becoming hard to find. Overfishing had depleted the numbers and they were not repopulating at a steady rate. In the early 1980’s after noticing that nature wasn’t going to be able to keep up with man’s demands of the scallop, programs were set up to monitor the scallop fishing industry and to also set catch limits.

In 1997 NOAA and the New England Fishery Management Council determined that the Atlantic sea scallops were still being overfished and by 1998 a new plan for allowing the scallop to increase their numbers was implemented.

The guidelines for fishermen proved to be useful and the scallop industry had great success. It was reported that the scallop biomass harvested had increased eighteen times higher than the previous level between 1994 – 2005.

The demand for the Atlantic sea scallop did not decrease. The sea scallop adductor muscle, the muscle that holds the two shells together and allows the animal to open and close the two shells, is harvested for food. The muscle is typically 30 – 40 mm in diameter in adult sea scallops. The demand for this tasty muscle has made the Atlantic sea scallop fishing industry into a very powerful and prosperous billion-dollar industry.

Fisherman will agree that science is essential to the health of their industry. It was determined that rotational management was needed for the scallops to replenish, much like crop rotation on land. After a period of time, areas need to rest without any activity and other areas can be reopened to scallop fishing after a period of time.

What that time period for rest is and what areas need to rest while other areas are opened to fishing is the science behind the industry. The industry recognizes that the science is essential to keep a healthy population of Atlantic sea scallops and, through a special research set-aside program, invests 25% of the scallops to research. The market value of the scallop, usually $10 -$14 per pound, determines the funding scientists can invest into research.

Resource management is not a new idea. Resources are managed at all levels whether they are animals such as scallops or deer, minerals or elements mined such as aluminum or coal, or even plants such as trees. Without management practices in place, there is a good possibility of endangering the resource for later use, and in the case of living animals, endanger their future viability.

Some of the “Research Set-Aside” monies given by the commercial fisherman have allowed the development of a special habitat mapping camera, affectionately called the HabCam. Dr. Scott Gallager has combined his two areas of expertise, biology and electronics and developed a series of cameras used for studying underwater habitats. NOAA has contracted Dr. Gallager to oversee the HabCam during the annual sea scallop survey.

While the original HabCam is being used by the commercial fishing industry on scallop vessels, a fourth generation HabCam is used by NOAA on the R/V Sharp to help with the annual Atlantic scallop survey. It has two sonar devices, one forward and one rear sonar scans a 50 meter swath on each side of the vehicle. It is equipped with four strobe lights that allow two cameras to take photographs. Each camera takes six pictures a second. The HabCam has a sensor called the CTD (Conductivity, Temperature, Depth) to measure physical properties such as salinity, temperature, depth, and dissolved oxygen. Two other sensors are used to measure turbidity, and a device that measures the scattering and absorption of light at that depth. Measuring absorption allows the computer to make color corrections on the pictures so the true colors of the habitat are seen. The vehicle is 3700 lbs. and made of stainless steel. It is actually towed through the water but is “driven” by using the metal jacketed fiber-optic tow cable which pulls it through the water. The HabCam relays the real-time images and data directly to the ship where it is processed by computers and also people monitoring the pictures. Computer Vision and Image Processing tools are also being developed to count and size scallops automatically from the images as the vehicle is being towed. This will allow managers in the future to use adaptive sampling approaches whereby the sampling track is actually changed as the vehicle is towed to optimize the survey.

By analyzing the data from the HabCam and doing dredges over mapped areas of the ocean, scientists can relay their findings to fisherman with suggestions on the best places to harvest Atlantic sea scallops. It is important to keep in mind the other animals in the area that may be affected by scallop fishing. The Yellowtail flounder is one such animals that could be better monitored with the aid of the HabCam. The flounder often is found living in areas that have a high density of sea scallops, but by identifying areas of high scallop and low yellowtail densities, fishermen may be better able to avoid yellowtail bycatch. Unfortunately, many bycatch fish do not survive the dredging and are often dead upon being returned to the sea.

While scallops and fish are certainly important to the commercial fishing industry, understanding the habitat that supports these organisms is paramount to their effective management. HabCam collects images that contain a huge amount of information on habitat factors such as temperature, salinity, chlorophyll, seafloor roughness, and substrate type (mud, sand, gravel, shells, boulders, etc). Habitat for one organism is not necessarily the same for the next so we need to put together maps of where certain habitats allow each species to exist and where they co-exist to form communities. Understanding this, we can simulate how communities will respond to climate change and other changing environmental factors such as Ocean Acidification (i.e., low ph), which all contribute to habitat.

Dr, Gallager worling on the HabCam — Dr. Gallager working on the HabCam

Because of the success of the HabCam and other habitat monitoring/mapping devices, HabCams I – VI have been built. There are four different vehicles used now for specialized data collection depending on what the survey priorities are.

HabCam is a unique, and high-end technology, but at the same time is being upgraded to provide habitat data on a variety of sampling platforms such as high speed torpedo-like systems that are towed at 10 kts or greater and on robotic Autonomous Underwater Vehicles (AUV) that will carry the stereo cameras and sonar systems currently on HabCam. The combination of robotics with underwater sampling provides a window into the ocean universe that humans have not been able to effectively explore and sample because of the great pressure and low temperature of the deep sea. Abyssal habitat (deeper than 3000m) is very difficult to sample and more and more oceanographers are looking to develop and use robots to get to where observations and samples need to be taken.

While the HabCam was initially developed for the scallop fishing industry, it has clearly made an invaluable contribution to the study of habitats that have so long been inaccessible to us. There are many cameras throughout the world used to take pictures of the ocean bottom and even animals therein, but the HabCam series that was developed out of Woods Hole Oceanographic Institution (WHOI) is integrating many different data types to develop a more comprehensive understanding of fauna and flora (animals and plants) in their habitats worldwide. It is an exciting time for oceanic research!

Sources:

National Marine Fisheries Services (www.nmfo.noaa.gov)

Dr. Scott Gallager PhD, tenured Associate Scientist, Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA, Visiting Professor, Okinawa Institute of Science and Technology, Okinawa, Japan.

Personal Blog:

I am feeling great and meeting so many fascinating people! Dr. Gallager, or Scott to the scientists on board, has taught me so much in the very short time I’ve been on the ship. He has many great stories as he has been involved in oceanic research for many years. He was asked to study the teak wood that the Titanic was made of because “Bob” Ballard saw so little of it even though all the decks and ornamentations were made of it. So Bob asked Scott to study it and Scott wrote a paper on the polychaete worm that was able to break down the tough cellulose tissue.

After our dredging yesterday resulted in many scallops, you will never guess what we are having for our 12:00 p.m. meal. I said 12:00 p.m. meal because for some of us it is breakfast and for others it is supper.

Dogfish on the bottom of the ocean, Picture taken by the Habcam.

Me and the other five scientists are now done with our 12 hour shift and the new group just took over. We were running the HabCam all day and then looking at random still photos from the HabCam to identify the life forms that are present. Dr. Gallager is working on a computer image recognizing HabCam, but he feels it is important to have humans involved as well. I am so thankful I am on the same crew as Dr. Gallager. I am actually getting better with the whole time schedule shock. Not really a big deal once you try it. (Like most things in life.)

Skate on the bottom of the ocean. Picture taken by the HaabCam. — Skate on the bottom of the ocean. Picture taken by the HabCam.