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...

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Bibliographic Details
Main Authors: Brown,C. L., Brooks,A. L.
Other Authors: NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CONN NEW LONDON LAB
Format: Text
Language:English
Published: 1974
Subjects:
Biology
Biological Oceanography
Acoustic Detection and Detectors
Acoustics
*Marine biological noise
*Fishes
Deep water
Acoustic measurement
Acoustic scattering
Density
Sea water
Mathematical models
Stratification
Profiles
Bibliographies
North Atlantic Ocean
Bermuda
Extremely low frequency
Very low frequency
Underwater sound
Depth
Ocean Acre program
*Deep scattering layers
Myctophidae
Melamphaidae
Sternoptychidae
Gonostomatidae
Quadrangle
Quadrangle The
North Atlantic
Online Access:http://www.dtic.mil/docs/citations/ADA018689
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA018689
Description
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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