Abstract

ROCHA, C.B et al. Phytase in diet of common carp fingerlings: produtive performance and carcass traits. Arq. Bras. Med. Vet. Zootec. [online]. 2010, vol.62, n.6, pp. 1462-1468. ISSN 0102-0935.  http://dx.doi.org/10.1590/S0102-09352010000600024.

A total of 240 fingerlings, with initial average weight 3.42±0.32g, were distributed in a completely randomized experimental design, with four treatments and four replicates. Basal diet consisted of vegetal ingredients (36% crude protein and 3,220kcal of digestible energy). Treatments corresponded to four levels of active phytase (UF) per kg of diet: zero (control), 500, 1,000, and 1,500. Every 15 days, a biometry was made and at the end of the experimental period (45 days) 5% of animals were euthanized to determine carcass yield and chemical-bromatologic composition. The following variables were evaluated: final weight, weight gain, total length, specific growth rate, and survial. There was no effect of phytase on productive performance; however, it significantly improved carcass characteristics

Keywords : fish; Cyprinus carpio; phytate; antinutritional; phosphorus.