Artículos de revistas
Influência da densidade de estocagem no desempenho produtivo do acará-bandeira (Pterophyllum scalare)
Fecha
2010-01-01Registro en:
Boletim do Instituto de Pesca. São Paulo: Inst Pesca, v. 36, n. 1, p. 9-16, 2010.
0046-9939
WOS:000290277000002
3860915077534516
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
The present study aimed to evaluate the effects of three different stock densities (0.33; 0.67 e 1.00 fish L-1) on freshwater angelfish productive performance reared in aquarium. Fish were fed with commercial diets during 35 days in two diary meals. The experimental design was entirely randomized and for each density were used four replicates. Were evaluated physical-chemical water parameters: temperature, oxygen dissolved concentration and total ammonia concentration and growth performance parameters: weight gain, feed conversion, specific growth rate, final standard length, conduction factor and length uniformity. Results were submitted to variance analysis and means were compared by Tukey's test (alpha = 0.05), it was used the statistic program ESTAT 2.0. Mortality was not observed in any tested density. on physical-chemical water parameters, total ammonia level increased significantly with stock density increasing, but they did not showed clinical signs of ammonia toxicity. As there were no significant differences between treatments, stock density 1.00 fish L-1 is the most indicated because it allows higher production.