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Atlantic Herring Acoustic Surveys
The NEFSC Advanced Sampling Technologies Research Group conducts annual fisheries acoustic surveys using state-of-the-art acoustic, midwater trawling, and underwater video technologies to improve fisheries-independent stock assessments for pelagic species. Pilot and experimental studies were conducted during 1995-97 to develop the NEFSC's fisheries acoustic capabilities. Annual NEFSC Atlantic Herring Acoustic Surveys began in 1998. NEFSC acoustic capabilities include multifrequency EK60 echosounder data, Acoustic Doppler Current Profiler (ADCP), and trawl monitoring systems. Midwater trawling, plankton sampling, and underwater video operations provide biological samples and target verification. CTD (conductivity-temperature-depth) vertical profiles are also routinely obtained during survey operations.
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Acoustics Research
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Fisheries acoustics data are collected from more than 200 sea-days each year aboard the FRV DELAWARE II and FRV ALBATROSS IV (decommissioned) and the FSV Henry B. Bigelow during pelagic, bottom-trawl, and marine mammal surveys. Acoustic sampling operations include continuous measurements using hull-mounted transducers and multi-frequency scientific echosounders. Biological sampling with midwater and bottom trawls, and underwater video deployments is conducted to verify species-specific backscatter and characterize sea-floor habitat. In-situ and laboratory experiments aid in understanding species-specific acoustic measurements. We are continuously developing, testing, and evaluating advanced sampling technologies during laboratory and field experiments to improve abundance estimates and map spatial and temporal distributions of fish and invertebrates. Acoustic, optic, and biological data are audited and archived in the NEFSC relational data management system.
EM710 Water Column Sonar Data Collected During FK181210
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Falkor Cruise FK181210 (EM710)
EM710 Water Column Sonar Data Collected During FK190612
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Falkor Cruise FK190612 (EM710)
Reson7125 Water Column Sonar Data Collected During NF1509
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EM710 Water Column Sonar Data Collected During FK180824
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Falkor Cruise FK180824 (EM710)
EM710 Water Column Sonar Data Collected During SKQ201915S
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Sikuliaq Cruise SKQ201915S (EM710)
EM710 Water Column Sonar Data Collected During SKQ201509T
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Transit (SKQ201509T, EM710)
EM710 Water Column Sonar Data Collected During FK181005
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Falkor Cruise FK181005 (EM710)
EM710 Water Column Sonar Data Collected During SKQ201507T
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Transit (SKQ201507T, EM710)
EM710 Water Column Sonar Data Collected During FK190315
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Falkor Cruise FK190315 (EM710)
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