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DEEPEND: Raw acoustic scattering data of water column organisms collected during R/V Point Sur cruise PS23-04 (DP08), Gulf of Mexico, from 2022-07-27 to 2022-08-07

Authors: Boswell, Kevin, Tracey Sutton, Savannah LaBua, and Matthew Johnston
Published On: Aug 23 2023 19:03 UTC
DOI: https://doi.org/10.7266/MBD6S8JT
UDI: NO.x959.000:0014
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File Format(s):
raw, md

Project Information

Funded By:
National Oceanic and Atmospheric Administration

Research Group:
DEEPEND/RESTORE Trends and drivers of faunal abundance of the offshore Gulf of Mexico

Point of Contact

Kevin Boswell
Florida International University / Marine Sciences Program
kevin.boswell@fiu.edu

Data Collection Period
2022-07-27
to
2022-08-07
Theme keywords

Bathymetry, Seafloor mapping, Acoustic scattering, Fish habitat, Marine habitat, Pelagic habitat, Benthic habitat, Fisheries, Echosounder, Simrad EK80, Nekton, Mesopelagic

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Abstract:

Patterns in acoustically-derived biological scatter through the water column were collected with multi-frequency scientific echosounders (Simrad EK80) operating at 18kHz, 38kHz, 70kHz and 120kHz following protocols developed during the NOAA NRDA DAP data collection operations. Specifically, transducers were installed on a rigid pole mounted to the side of the ship and calibrated at sea for operating conditions following protocols developed by Dr. Kevin Boswell during the ONSAP/DAP cruises. The dynamics of the mesopelagic scattering community will be examined through the depth- dependent scattering responses at the 18 and 38 kHz frequencies, as well as through the difference between the mean volume backscattering strength (MVBS; in dB) at 18 kHz and 38 kHz (dMVBS (18-38)). In addition, scatterers in the upper water column (~150m) will be examined by analyzing all four available frequencies. Data were collected during R/V Point Sur cruise PS23-04 (DP08, cruise DOI 10.7284/909796, from 2022-07-27 to 2022-08-07). This dataset is a result of research funded by the National Oceanic and Atmospheric Administration's RESTORE Science Program (ROR - https://ror.org/0042xzm63) under award #NA19NOS4510193 to Nova Southeastern University.

Suggested Citation:

Boswell, Kevin, Tracey Sutton, Savannah LaBua, and Matthew Johnston. 2023. DEEPEND: Raw acoustic scattering data of water column organisms collected during R/V Point Sur cruise PS23-04 (DP08), Gulf of Mexico, from 2022-07-27 to 2022-08-07. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/MBD6S8JT

Purpose:

To examine the spatial and temporal dynamics of deep sea nekton in the Gulf of Mexico through a multidisciplinary approach.

Data Parameters and Units:

Raw acoustic scattering data of organisms from the water column. Scattering intensity (mean volume backscattering strength, [dB]), Time [hh:mm:ss], Latitude [decimal degrees], Longitude [decimal degrees], Depth [m].

Methods:

Acoustically-derived biological scatter through the water column were collected with multi-frequency scientific echosounders (Simrad EK80) operating at 18kHz, 38kHz, 70kHz, 70WkHz, 120kHz, 200kHz, and 200WkHz following protocols developed during the NOAA NRDA DAP data collection operations.

Instruments:

Simrad EK-80 echosounder