Abstract
: Aiming verify influences of photoperiod in larvae of robalo peva, classified as visual predators, two experiments were accomplished in laboratory of sea fish farming of UFSC. In the first, larvae were used from 0-14 days. Survival and standard length (Sl) were analyzed. In the second, larvae were used among 31-62 days and it was evaluated: survival; Sl, total length (Tl); weigh (g); Index of alimentary conversion (IAC), feeding rate, growth specific daily rate (SGR) and factor of condition of Fulton (K). Were used 9 tanks (4,5 L, with 180 and 35 larvae/tank, in experiments 1 and 2, respectively). The treatments were: 12, 18 and 24 hours of light, in triplicate (12 h, 18 h and 24 h respectively). Rotifers (Brachionus sp.), Artemia and ration for weans they were supplied in the experiments 1 and 2 respectively. The largest values of Sl showed in treatments 24 h and 18 h. In the second, weight; Tl and IAC and feeding rate were larger in 18 h. We recommended illumination with 18 hours in the two studied larval periods.
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