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Cayman Islands Government

Fishing for Data

Students visited the research vessel Gordon Gunter.

Tracking and counting fish larvae in the waters surrounding the Cayman Islands may enable marine scientists onboard a National Oceanic and Atmospheric Administration (NOAA) vessel, to offer some insight into local groupers' lifecycles.

Scientists onboard the RV Gordon Gunter are currently criss-crossing the Caribbean primarily seeking blue fin tuna larvae in an effort to better understand this endangered species.

However, a request from the Department of Environment (DOE) has resulted in them adding the counting of grouper larvae to their work-list.

"We are very thankful for this concession. Nassau grouper spawning events generally occur this time of year. With NOAA's help we can learn a lot about the prevalence and path of grouper larvae and the information can strengthen our conservation efforts," DOE Deputy Director Tim Austin noted.

NOAA researchers use a Multiple Opening and Closing Net with an Environmental Sensing System (MOCNESS) to gather samples at different ocean sites and depths. These samples are then scrutinized in an onboard laboratory as scientists look for fish larvae.

"The MOCNESS is a high-tech sampling system and is towed behind the ship with nets opening and shutting independently to sample discrete patches of water. An array of sensors mounted on the instrument frame relays water conditions up to the ship in real time.

"The data allows researchers match what they find in their samples to the physical properties of the seawater," NOAA Research Associate Estrella Malca explained.

The RV Gordon Gunter operates primarily in the waters of the Gulf of Mexico, the Atlantic Ocean and the Caribbean Sea, conducting scientific surveys to determine the health and abundance of fishery resources and marine mammals.

The vessel docked in Grand Cayman this week to allow staff to meet their DOE counterparts. The crew also hosted a group of marine science students from Cayman Prep and High School.

For more on the ship and its crew's activities go to http://www.moc.noaa.gov/gu/

For further information contact: Cornelia Oliver