On acoustic identification, sizing and abundance estimation of fish
Abstract
A method using the fish angle (i.e. the change in target strength with fish aspect)
for identification purposes is described. Significant differences in fish angle between
cod and coalfish have been observed at sea. The effect of fish angle on the sampling
volume of an echosounder is discussed, and it is shown that the sampling volume
decreases with decreasing fish angle. A method for abundance estimation applying
an echo integrator is described and discussed.
Publisher
HavforskningsinstituttetSeries
Fiskeridirektoratets skrifter, Serie Havundersøkelservol 16 no 1