Acoustic abundance estimation of the spawning component of the local herring stock in Lindaaspollene, western Norway
Research report
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http://hdl.handle.net/11250/114442Utgivelsesdato
1983Metadata
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During 1978-1980 yearly acoustic surveys were carried out in the spawning area of a small
herring stock in the semi-enclosed bay area Lindaaspollene, approximately 30 km north of Bergen,
using the Simrad EY-M echo sounder system. Absolute abundance estimates have been calculated
by means of echo integration of the survey data and controlled acoustic measurements of
anaesthetized single fish at tilt angles between -45° and 45°. The stock size may roughly be set at
150,000-250,000 individuals in 1979, while in 1980 the number was 100,000-200,000 older fish and
150,000-300,000 recruits.
Utgiver
[Fiskeridirektoratets havforskningsinstitutt]Serie
Fiskeridirektoratets skrifter, Serie Havundersøkelservol 17 no 8