Emina Mesanovic, Wet Lab: Something Fishy Is Going on Here, July 23, 2014

NOAA Teacher at Sea

Emina Mesanovic

Aboard the NOAA ship Pisces

July 20 – August 2, 2014

Mission: Southeast Fishery- Independent Survey

Geographic area of the cruise: Atlantic Ocean, off the coast of North Carolina and South Carolina

Date: July 23, 2014

Weather Information from the Bridge

Air Temperature: 27.4 C

Relative Humidity: 85%

Wind Speed: 13 knots

 

Science and Technology Log

The goal of the Southeast Fishery Independent Survey (SEFIS) is to assess the location and abundance of different species focusing on snappers and groupers as well as collecting bathymetric data about the ocean floor that can be used in the future. The scientists are divided into day and night shifts, the night shift maps the ocean floor, while the day shift uses these maps to set traps and catch fish.

Traps on the back deck ready to go.
Traps on the back deck ready to go.

Each morning the scientists set up six chevron traps on the back deck of the Pisces, each trap is stocked with 24 menhaden, which serves as the baitfish. The traps contain the same amount of bait, two cameras one on the front and one on the back, and each trap stays underwater for 90 minutes. Chief Scientist Zeb Schobernd works in the dry lab to let the crew know when and where to drop the traps (more on this later).

Trap going down the rap into the water.
Trap going down the ramp into the water

When its time to retrieve the traps the crew of the Pisces works with chief scientist and the Bridge to retrieve the traps.  When you are on the deck waiting for the traps to be lifted on board you have to wear a safety helmet and life preserver. Once the traps on are on the deck the scientists really start to hustle. They remove the cameras from the traps and empty the trap into black bins.

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Chevron Trap being lifted onto the deck

Once we are in the wet lab the first step is to sort the fish by species. In the picture on below you will see 3 bins with red porgy, vermilion snapper, and trigger fish these are 3 of the 4 most common commercially important fish we catch the 4th is black sea bass.

Sorting the fish
Sorting the fish
Red Porgy, Vermillion, & Trigger Fish
Red Porgy, Vermilion Snapper, & Trigger Fish
Measuring the total length of the fish
Measuring the total length of the fish

Next we need to weight the sample in kilograms and record the total size of the fish in millimeters. The fish that are not being kept for further study are returned to the ocean. It can get very busy and messy in the wet lab when the traps produce a large catch. The goal is to process one trap before the next trap is brought on deck. The traps are dropped three times daily for a total of 18 traps caught per day; it is the scientist’s goal to completely process the traps before the completion of their 12 hours shift. Certain fish are of special interest to the scientists because they are commercially and recreationally important to the fishing community so these fish are set aside for further study. On Monday July 21st we caught a 10.47 kg Red Grouper, which is one of the fish that is studied in more detail.

Red Grouper caught on Monday July 21, 2014
Red Grouper caught on Monday July 21, 2014

For this fish in addition to recording the weight and total length, scientists also record the fork length and standard length. The scientists also collect the otoliths (ear bones) from the fish which are used to determine the age of the fish just likes rings on a tree are used to determine age. Finally scientists collect DNA and part of the gonads for additional study back at the laboratory.

 

 

 

 

 

 

Personal Log

My first few days on the Pisces have been busy and very exciting there is so much to see and learn. Everyone on board has been very friendly and welcoming. As I look out my window every morning all is see is blue for miles. Even though we are only 10-50 miles off the coast of North Carolina on any given day there is nothing out here but ocean. It’s impressive how vast the ocean is and how little we know about the geography of the ocean or the animals that inhabit the sea floor.

Leaving Morehead
Leaving Morehead City, North Carolina
Looking down from the top deck of the Pisces.
Looking down from the top deck of the Pisces.

 

 

 

 

 

 

 

 

 

 

 

We set sail from Morehead City, North Carolina at 10am on Sunday July 20th and I had a great view from the top deck of the Pisces as we left the harbor. After lunch we practiced the abandon ship and fire drills, however I was not able to participate because I was seasick. Did you know that seasickness occurs when our brain receives conflicting information from our body. Onboard the Pisces it doesn’t look like anything is moving so my eyes sent my brain a message that there was no movement, but my inner ear, which is responsible for balance, sensed the motion of the boat and this conflicting information caused my seasickness. By Monday I was feeling much better and I was ready to get to work.

The bunks in our stateroom
The bunks in our stateroom

Life on the Pisces is very comfortable. I am sharing a stateroom with Mary who is a great roommate. We each have our own bunk with a curtain for privacy as well as lockers for storage. Additionally our bathroom is located in our room, which was a wonderful surprise because I thought that we would all be sharing a single bathroom. There is a lounge across from our room with large comfy chairs and an impressive DVD collection, however I have been too tired from working in the wet lab to enjoy it yet. There is also a gym somewhere on the ship but I don’t think that I will ever have enough balance onboard the ship to use the gym safely. Stay tuned, tonight I’m going to spend the night mapping the ocean floor and I’ll let you know how it goes.


SCIENTIST SPOT LIGHT

Zeb Schobernd : Chief Scientist

Education: Masters from Earlham College and a Masters from College of Charleston in Marine Biology

How long have you worked with NOAA? Since 2007, started this project in 2010

Chief Scientist Zeb Schonberned in the dry lab
Chief Scientist Zeb Schonberned in the dry lab

How important is collaboration in your research? Being able to share and work together is a large part of the marine biology community. On this cruise for example we are collaborating with scientists from Beaufort as well as with local universities we have 2 volunteers from the College of Charleston sailing with us.

How long have you participated in this survey? Since the start of the SEFIS survey in 2010, currently in its 5th season.

Does your team change every year? The core group of research scientists stays the same, but the volunteers and lab assistants’ changes year to year.

How does the Pisces compare to other ships? The Pisces is larger than other ships I have worked on. It’s more comfortable, there is more space for scientists to spread out and work. Additionally the Pisces has the equipment need to map the floor, which makes determining where to drop traps more efficient.

How many days a year do you go out to sea? I spend about 45 days out at sea. 

What do you do when you are not out at sea? I work on processing the videos that were collected on the cruise; we need to identify the fish species that are on caught on camera. The cameras are often more valuable then the fish that we trap because some fish may never go in the trap so these videos allow us a better picture of the underwater ecosystem.

What is the biggest challenge about doing research at sea? The biggest challenge would be bad weather that impacts sea conditions. Also time away from home can be challenge on long cruises.

What would be your dream research cruise? I would like to be able to use a submersible to record videos of tropical fish for further study.

Any advice you have for students interested in marine biology as a career? Gain hands on experiences in the field by doing internships while in college to determine if this is what you really want to do. What I do on a day to day basis is very similar to what I experienced on a research cruise while I was in grad school.

Coolest catch: 6 Gilled Shark

Favorite fish: Groupers

COOL CATCH OF THE DAY

Shark sucker attached to Kate's arm.
Shark sucker attached to Kate’s arm.

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