DETERMINING THE EXTINCTION CROSS-SECTION OF AGGREGATING FISH

被引：22

作者：

FOOTE, KG

ONA, E

TORESEN, R

机构：

[1] Reidar Toresen Institute of Marine Research, 5024, Bergen, Norway

来源：

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 1992年 / 91卷 / 04期

关键词：

D O I：

10.1121/1.403682

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

When fish are aggregated over a flat bottom, and fish and bottom echoes can be distinguished, it is possible to determine the fish extinction cross section by a simple application of the echo integration method. The theory for this is developed. Measurements at 38 kHz are presented for aggregations of the same 1983-year class of herring over flat-bottomed fjord areas in 1988, 1990, and 1991. The ratio of extinction and backscattering cross sections is found to lie in the approximate range from 1.2-2.3, depending on fish size and time of day.

引用

页码：1983 / 1989

页数：7

共 30 条

[21]

MacLennan D., 1990, P I ACOUSTICS UK, V12, P99

[22]

NAKKEN O, 1977, Rapports et Proces-Verbaux des Reunions Conseil International pour l'Exploration de la Mer, V170, P52

[23] PHYSIOLOGICAL FACTORS CAUSING NATURAL VARIATIONS IN ACOUSTIC TARGET STRENGTH OF FISH [J].

ONA, E .

JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM, 1990, 70 (01) :107-127

[24]

ROTTINGEN I, 1976, Fiskeridirektoratets Skrifter Serie Havundersokelser, V16, P301

[25]

ROTTINGEN I, 1975, THESIS U BERGEN BERG

[26] A FIELD EXAMINATION OF ACOUSTICAL SCATTERING FROM MARINE ORGANISMS AT 70 KHZ [J].

STANTON, TK ;

NASH, RDM ;

EASTWOOD, RL ;

NERO, RW .

IEEE JOURNAL OF OCEANIC ENGINEERING, 1987, 12 (02) :339-348

[27] MULTIPLE-SCATTERING WITH APPLICATIONS TO FISH-ECHO PROCESSING [J].

STANTON, TK .

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1983, 73 (04) :1164-1169

[28] ABSORPTION OF ACOUSTIC ENERGY IN DENSE HERRING SCHOOLS STUDIED BY THE ATTENUATION IN THE BOTTOM ECHO SIGNAL [J].

TORESEN, R .

FISHERIES RESEARCH, 1991, 10 (3-4) :317-327

[29]

Urick R., 1983, PRINCIPLES UNDERWATE

[30]

WESTON BE, 1967, UNDERWATER ACOUSTICS, V2, P55

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