Dataset Available Remotely Hosted

Raw acoustic scattering data of organisms from the water column, cruise DP05, April 2017 – May 2017

Authors: Kevin Boswell, Tracey Sutton, Savannah LaBua
Published On: May 14 2018 21:47 UTC
DOI: https://doi.org/10.7266/N7474871
UDI: R4.x257.229:0003
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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

Tracey Sutton
Nova Southeastern University / Halmos College of Natural Sciences and Oceanography
tsutton1@nova.edu

Data Collection Period

2017-04-30 to 2017-05-10

Theme keywords

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

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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, 70WkHz, 120kHz, 200kHz, and 200WkHz following protocols developed during the NOAA NRDA DAP data collection operations. Specifically, during each cruise, 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 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.

Suggested Citation:

Kevin Boswell, Tracey Sutton, Savannah LaBua. 2018. Raw acoustic scattering data of organisms from the water column, cruise DP05, April 2017 – May 2017. Distributed by: Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC), Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7474871

Publications:

Easson, C. G., Boswell, K. M., Tucker, N., Warren, J. D., & Lopez, J. V. (2020). Combined eDNA and Acoustic Analysis Reflects Diel Vertical Migration of Mixed Consortia in the Gulf of Mexico. Frontiers in Marine Science, 7. doi:10.3389/fmars.2020.00552

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 Scattering intensity (mean volume backscattering strength, dB), Time (hh:mm:ss), Latitude (decimal degrees), Longitude (decimal degrees), Depth (m)