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  • ICES CM documents authored by IMR scientists (1949-2011)
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Dynamics of wintering Norwegian spring-spawning herring at the entrance to Tysfjorden, December 1996

Huse, Ingvar; Foote, Kenneth G.; Ostrowski, Marek
Working paper
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CM_1997_CC_16.pdf (1.046Mb)
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http://hdl.handle.net/11250/105695
Issue date
1997
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  • ICES CM documents authored by IMR scientists (1949-2011) [3135]
Original version
This report is not to be cited without prior reference to the authors  
Abstract
The entrance region to Tysfjorden was acoustically surveyed a total of eleven times

during the December 1996 abundance survey of the spawning stock of Norwegian

spring-spawning herring (Clupea harengus). The observations are summarized

through maps of the distribution, vertical sections, and statistical measures of acoustic

density in each of two strata. Experimental variograms are modeled, yielding

parameter values that summarize the major properties of aggregation. The collective

measures of density and aggregation portray a highly dynamic situation with strong

diel variation but a general persistence of the fish distribution over the eleven days of

its repeated observation.
Publisher
ICES
Series
ICES CM Documents;1997/CC:16

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