A Summary Report of Progress in the Ocean Acre Program

• 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

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.