Comparação entre o selênio orgí­¢nico e o inorgí­¢nico empregados na dieta de alevinos de jundiá (Rhamdia quelen)

Sérgio Renato Noguez Piedras; Paulo Roberto Rocha Moraes; Loraine André Isoldi; Juvêncio Luís Osório Fernandes Pouey; Fernando Rutz

Authors

Sérgio Renato Noguez Piedras Dr. Prof. da Escola de Ciências Ambientais da Universidade Católica de Pelotas/RS
Paulo Roberto Rocha Moraes Oceanólogo, Especialista da Estação de Piscicultura da Universidade Católica de Pelotas/RS
Loraine André Isoldi DrÂª. Prof.Âª da Escola de Ciências Ambientais da Universidade Católica de Pelotas/RS
Juvêncio Luís Osório Fernandes Pouey Médico Veterinário, Dr. Professor do Departamento de Zootecnia da Universidade Federal de Pelotas/RS Bolsista do CNPq http://orcid.org/0000-0002-5740-4466
Fernando Rutz Dr. Professor do Departamento de Zootecnia da Universidade Federal de Pelotas/RS

Keywords:

survival, growth, weight gain, Rhamdia quelen, selenium

Abstract

Selenium is an essential mineral for fish performance. As a nutrient, a concentration of 0.1 to 0.5 mg/kg of diet dry weight is required. The deficiency of it may cause reduction in growth, fertility and antibodies production. The objective of this experiment was to evaluate the effect of diet supplementation with organic and inorganic selenium on the raising of silver catfish (Rhamdia quelen) fingerlings, by comparing the performance of three groups of twenty fingerlings (98.0 Â± 12.0 mg), with four replications, and diet supplemented with: 0.3 mg inorganic selenium/kg + 0.3 mg organic selenium/kg (T1); 0.6 mg inorganic selenium/kg (T2); and 0.6 mg organic selenium/kg (T3). After 55 days of cultivation, the group that received diet with only organic selenium supplementation (T3) showed results significantly higher of survival index, final average weight and group uniformity. Thus, it was concluded that organic selenium enhances the performance of silver catfish fingerlings.

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