Efeitos da densidade de estocagem na segunda alevinagem de tilápia nilótica (oreochromis niloticus), em sistema raceway

Resumo

This experiment studied the stocking density on the level where the initial weight of nile tilapia (oreochromis niloticus) fingerling is 1 g and final weight is 30 g in raceways. the experiment was did from november to december 2003 (35 days), in fish production sector of Federal University of Goiás. the experiments units used were twelve 90 L tanks, full water exchange in 60 minutes in the beggining and 45 minutes at the end of the experiment and the starterweight was 8.04 ± 1.81g. the stocking densities were 700 fingerlings/m3, 1,000 fingerlings/m3 and 1,300 fingerlings/ m3. the following parameters were analyzed: mortality; final weight; final length; final biomass; food conversion rate; weight gain; daily weight gain; protein efficiency rate; specific growth rate and condition factor. tukey test and variance analysis, with 95% of confidence, to compare the treatments. The treatments with 1,000 and 1,300 fingerlings/m3 showed bigger final biomass (p<0,05) than 700 fingerllings/m3. The others parameters weren’t different between the treatments (p>0,05) and the dissolved oxigen was critical at the end. Due to the high mortality, as the stocking density was reduced, the parameters were similar between the treatments.

Descrição

Palavras-chave

Densidade de estocagem, Raceway, Segunda alevinagem, Tilápia, Fingerlings, Raceway, Stocking density, Tilápia

Citação

MAEDA, Henrique; SILVA, Paulo César; AGUIAR, Marília da Silva; PADUA, Delma Machado Cantisani; OLIVEIRA, Raquel Priscila de Castro; MACHADO, Nádia Pales; RODRIGUES, Valéria; SILVA, Rene Henrique da. Efeitos da densidade de estocagem na segunda alevinagem de tilápia nilótica (oreochromis niloticus), em sistema raceway. Ciência Animal Brasileira, Goiânia, v. 7, n. 3, p. 265-272, jul./set. 2006. Disponível em: <https://www.revistas.ufg.br/vet/article/view/412/387>.