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Raw acoustic scattering data of organisms from the water column, cruise DP04 (R/V Point Sur cruise PS17-03), 2016-08-06 - 2016-08-19

Authors: Boswell, Kevin
Published On: Jan 19 2018 18:49 UTC
DOI: https://doi.org/10.7266/N7H41PX6
UDI: R4.x257.000:0015
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Project Information

Funded By:
Gulf of Mexico Research Initiative

Funding Cycle:
RFP-IV

Research Group:
Deep-Pelagic Nekton Dynamics of the Gulf of Mexico (DEEPEND)

Point of Contact

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

Data Collection Period
2016-08-06
to
2016-08-19
Theme keywords

Bathymetry, Seafloor mapping, Acoustic scattering, Fish habitat, Marine habitat, Benthic habitat, Fisheries, Pelagic habitat, Echo sounder

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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. Boswell during the ONSAP/DAP cruises. The dynamics of the mesopelagic scattering community were examined through the depth dependent scattering responses at both frequencies (18 and 38kHz) 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) were examined by analyzing the all four available frequencies. By integrating both methods, the magnitude of biological scattering at discrete-depth intervals was classified into major taxonomic components (e.g., fluid-like crustaceans, swimbladdered fishes) based on resonant properties and behavior. Data were collected aboard the R/V Point Sur (cruise PS17-03, DEEPEND DP04, 2016-08-06 - 2016-08-19).

Suggested Citation:

Boswell, Kevin. 2018. Raw acoustic scattering data of organisms from the water column, cruise DP04 (R/V Point Sur cruise PS17-03), 2016-08-06 - 2016-08-19. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7H41PX6

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, processed data flows of acoustic data from each frequency, processed water-column level CTD data. Earth Science > Oceans > Ocean Acoustics > Acoustic Scattering Earth Science > Oceans > Aquatic Sciences > Fisheries Earth Science > Oceans > Ocean Acoustics Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Pelagic Earth Science > Biosphere > Ecosystems > Marine Ecosystems Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Benthic Earth Science > Biosphere > Ecosystems > Aquatic Ecosystems Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography

Instruments:

Simrad EK80 (In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > WCMS > Water Column Mapping System)