ACOUSTIC OBSERVATIONS OF GAS BUBBLE RELEASE BY PACIFIC HERRING (CLUPEA-HARENGUS-PALLASI)

被引:31
|
作者
THORNE, RE [1 ]
THOMAS, GL [1 ]
机构
[1] UNIV WASHINGTON,SCH FISHERIES,SEATTLE,WA 98195
关键词
D O I
10.1139/f90-216
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Pacific herring release gas bubbles during diel vertical migration and while holding in strong currents. The gas may result from fermentation in the gut, or herring may gulp gas at the surface prior to descent to daytime depths. One consequence of differing amounts of gas would be changes in the acoustic target strength of herring, a critical parameter in acoustic assessment techniques. -from Authors
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页码:1920 / 1928
页数:9
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