Growth and survival of juvenile yellowtail flounder Pleuronectes ferrugineus (Storer) under different photoperiods

Yellowtail flounder Pleuronectes ferrugineus (Storer) have been identified as a potential species for coldwater aquaculture along the north-east coast of Canada. It has been shown that increased photoperiods improve growth an d survival during the larval stage of this species. We conducted two experi ments to determine the effect of photoperiod on the growth and survival of juveniles. The first experiment compared growth and survival under 24-, 18- and 12-h lighting per day with a restricted food ration. The second experi ment compared growth and survival rates under the above photoperiods and am bient lighting with fish being fed to satiation. No significant differences in growth or survival were found in juveniles under the different photoper iods in either experiment.