Lipid profile of parr and smolts of Atlantic salmon (Salmo salar L.) reared in aquaculture under various lighting regimes

The study of the biochemical mechanisms of the effect of additional lighting on the growth and early development of salmonids in aquaculture allows to identify patterns of slow or accelerated growth, as well as the onset of the smoltification. In this study, the results of changes in lipid status in parr and smolts of Atlantic salmon after the “winter window” (December-January) are presented. These results were obtained from three experimental groups exposed to different lighting and feeding regimes at the fingerlings stage. The changes in lipid composition of the studied young salmon indicate the onset of smoltification in all experimental groups. However, this effect is the most pronounced in the fish previously reared under continuous lighting during the summer-autumn season.