JAS002581.pdf (54.07Kb)

Major aims were to estimate abundance, distribution and patchiness of northeast Atlantic mackerel by means of acoustic multifrequency echosounder recordings, multibeam sonars and

Blue whiting was recorded during surveys by use of echo sounders. For measurements of fish density the echo sounder was connected to an echo integrator. Some of

Abstract: Diurnal fluctuations in total integrated echo abundance and in vertical density profiles were examined using data from the Norwegian combined acoustic and bottom-trawl

The principle of tracking radar, aligning the antenna beam with a target, was applied with an acoustic split-beam transducer and dual-axis rotators for tracking individual fish

AKSKLAND, M. Acoustic abundance estimation of the spawning component of the local herring stock in Lindaaspollene, western Norway. During 1978-1980 yearly acoustic

The acoustic abundance estimation method is currently being applied to almost all fish stocks in Norwegian waters. These include Barents Sea capelin,

Some work has been done on standardization of the bottom trawls used by the Icelandic research vessels in ground fish surveys (stock size estimation). Some

When comparing acoustic estimates of spawning stock abundance of the Icelandic capelin obtained in October surveys to those obtained in January/February in the