ABSTRACT
Growth rates for post-smolt Atlantic salmon were estimated based on reports from three commercial landbased farms. In two outdoor farms exposed to natural daylight, growth during the autumn and winter was depressed compared to growth rates of salmon in net-pens. In a farm using a continuous light regime, however, no such growth depression during the winter was experienced. The results suggest that growth in post-smolts in landbased farms is under photoperiodic control.
