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Geostatistical analysis of acoustic survey data on 0-group herring in a fjord

Foote, Kenneth G.; Rivoirard, Jacques
Working paper
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CM_1992_D_10.pdf (1.674Mb)
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http://hdl.handle.net/11250/105044
Utgivelsesdato
1992
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  • ICES CM documents authored by IMR scientists (1949-2011) [3139]
Originalversjon
This report is not to be cited without prior reference to the authors  
Sammendrag
An essentially pure aggregation of 0-group herring in Altafjord in

northern Norway was acoustically surveyed on each of the first three days

of December 1991. Measurements were made at 38 kHz during each survey

and at 120 kHz during part of the second survey and all of the third

survey. The data are expressed in terms of the area backscattering

coefficient, applicable to the entire water column and averaged over

intervals of 0.1 nautical mile. The spatial structure of the aggregation

is characterized by the variogram. By means of geostatistics, estimates

of abundance over the survey area are supplemented by estimates of variance.
Utgiver
ICES
Serie
ICES CM Documents;1992/D:10

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