A Summary Report of Progress in the Ocean Acre Program
The Ocean Acre program is a long-term, multidiscipline research project designed to study the acoustic and biological characteristics of the Deep Scattering Layer(s) (DSL) in a one-degree quadrangle (the 'Acre') of open ocean water located near Bermuda. During the fourteen cruises in the a...
Main Authors: | , |
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Other Authors: | |
Format: | Text |
Language: | English |
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1974
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Online Access: | http://www.dtic.mil/docs/citations/ADA018689 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA018689 |
Summary: | The Ocean Acre program is a long-term, multidiscipline research project designed to study the acoustic and biological characteristics of the Deep Scattering Layer(s) (DSL) in a one-degree quadrangle (the 'Acre') of open ocean water located near Bermuda. During the fourteen cruises in the area, more than 300 fish species from 80 families were collected. Approximately 90% of these specimens belong to the following four families: Myctophidae, melamphaidae, sternoptychidae, and gonostomatidae. Acoustic measurements taken at discrete frequencies from 1.3 to 15.5 kHz showed that the scattering strengths and depths of the DSL remained fairly constant from day-to-day and night-to-night. A mathematical model has been developed that provides a computer printout of scattering strengths and resonant frequencies. A comprehensive bibliography and a listing of the various research investigations being carried out with Ocean Acre material follow the text. See also rept. no. NUSC-4211, AD-891 910. |
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