Biology and ecology of Norway pout (Trisopterus esmarki Nilsson, 1855) in the Norwegian Deep

Between 1985 and 1987 Norway pout was widely distributed at moderate depths in the Norwegian Deep, generally 5-10 m above the sea bed, but somewhat closer by day. The bathymetric distribution was progressively deeper with increasing age; within an age-group, larger individuals were distributed deeper than smaller ones. There were relatively small geographical and seasonal differences in abundance, except that the abundance tended to increase from south-east to north-west, especially for the mature part of the population in the spawning season. Close to 100% matured for the first time as II-group. The diet was highly dominated by euphausiids and the feeding was more intense at night than during the day.