Continuous light increases growth rate of Atlantic salmon ( Salmo salar L.) postsmolts in sea cages

Abstract

Groups of Atlantic salmon ( Salmo salar L.) postsmolts were reared in sea cages under natural light or continuous additional light from 20 February to 24 June. The two light regimes were combined with two feeding regimes in a 2 by 2 factorial design. No significant differences in growth rate were found between the feeding regimes. Growth rate and incidence of grilsing were highest in the groups subjected to continuous additional light.