Desempenho zootécnico de juvenis de tambaqui (Colossoma macropomum) submetidos a ciclos curtos de restrição alimentar e realimentação

• Ano de defesa: 2018
• Autor(a) principal: Roa, Fabian Gustavo Barreto
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Mato Grosso; Brasil; Faculdade de Agronomia, Medicina Veterinária e Zootecnia (FAMEVZ); UFMT CUC - Cuiabá; Programa de Pós-Graduação em Ciência Animal
• Palavras-chave em Português: Manejo alimentar; Piscicultura; Privação alimentar; CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA; Feeding management; Fish farming; Starvation
• Link de acesso: http://ri.ufmt.br/handle/1/2720

In the wild, food deprivation for prolonged periods presents in some fish species as part of their natural life cycle, but they have recoverability after normalizing their feeding. Feed restriction after normalization of feed causes metabolic changes that affect high growth rates, better feed conversion, but these responses depend on the species, growth stage, environmental conditions, among others. The objective of this work was to evaluate if shortterm cycles of feed deprivation and refeeding affect the zootechnical performance and metabolic and hematological parameters of tambaqui juveniles (Colossoma macropomum). The research was developed in two phases, the first one lasting 60 days (phase one) followed by the second phase, with a duration of 65 days. In phase one, under laboratory conditions, the fish were stored in experimental boxes and submitted to the following feeding protocols: daily feeding (control); feeding for five or three days and feed deprivation for two days (5F/2D; 3F/2D) and feeding for two days and feed deprivation for four days (2F/4D). In stage two (field experimentation), the fish were transferred to a nursery pond and fed continuously. At the end of both phases, performance fish, metabolic and hematologic responses and centesimal analysis of the fillets were evaluated. Short-term cycles of feed deprivation and refeeding (phase one) caused metabolic and hematological alterations, lower growth and utilization of endogenous energy reserves for glycemic maintenance. When the restricted fish were fed continuously for 65 days (phase two) there was partial compensatory growth and reestablishment of the metabolic and hematological parameters. Fish production systems lack information that helps to better understand fish responses in different food management conditions and the results of this research can be used as decision tools in different productive situations.