Fordeling og mengde av brisling i oktober 1971 i vestnorske fjorder

Abstract

An echo survey for sprat was carried out in late October 1971 in the fjords of western Norway. Echo recordings were identified by samples obtained with pelagic trawl. The recorded distribution of sprat within the investigated area is indicated. Attempts were made to obtain relative estimates of abundance in the different fjord systems by the use of an echo integrator. Length distributions showed that most of the sprat belonged to the 0-group, Compared to 1971 higher catches are predicted for the summer fishery in 1972. Abundance and distribution in autumn 1971 resemble the conditions of autumn 1969.