A couple of trials to test the effects of photoperiod and light intensity on growth and survival of Atlantic bluefin tuna larva were carried out. With regard to light intensity, no significant differences were found between 500, 1000 and 2000 luxes. With regards to photoperiod meanwhile long photoperiods lead to a greater growth, intermediate photoperiods (16hL:8hD and 12hL:12hD ) improve significantly survival rates.
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