<b>Criação da garoupa-verdadeira Epinephelus marginatus (Lowe, 1834) (Teleostei, Serranidae) alimentada com rejeito de pesca e ração úmida em tanques-rede</b>

Abstract

Culture of dusky grouper Epinephelus marginatus (Lowe, 1834) (Teleostei, Serranidae) fed with by catch and moist diet in floating net cages Several works point the serranidae as one of the main families of marine fishes produced commercially. However, in Brazil, the cultivation of marine fishes are practically inexistent, in spite of the serranidae be a group frequently found along the Brazilian coast. The objective of the present study was to evaluate the culture of dusky grouper (Epinephelus marginatus) fed with fish by catch and moist diet. The fishes were divided in two lots (A and B). The lot A was fed with moist diet and the lot B was fed with fish by catch. The lot A presented a initial mean weight of 105.5 ± 16.7 grams and the lot B 198.4 ± 39.9 grams. After 150 days the lot A presented a mean weight of 213.5 ± 61.7 grams and the lot B a medium weight of 473.9 ± 109.5 grams. The lot A, at the end of the experiment, presented some fishes slenders, demonstrating a non adaptation of the animals to the type of formulate used. The lot B presented a better apparent feed conversion demonstrating the clearly ability in weight-gain of the dusky grouper when submitted to diet based on fish by catch.