Data/hora: 03/06/2024 21:49:00

Biblioteca(s): | Embrapa Pesca e Aquicultura.
Data corrente: | 17/04/2018
Data da última atualização: | 02/05/2018
Autoria: | LIMA, A. F.; TAVARES-FILHO, A.; MORO, G. V.
Afiliação: | ADRIANA FERREIRA LIMA, CNPASA; AMILTON TAVARES-FILHO, UNIVERSIDADE FEDERAL DO TOCANTINS, Palmas-TO; GIOVANNI VITTI MORO, CNPASA.
Título: | Natural food intake by juvenile Arapaima gigas during the grow-out phase in earthen ponds.
Ano de publicação: | 2018
Fonte/Imprenta: | Aquaculture Research, v. 49, p. 2051-2058, 2018.
DOI: | 10.1111/are.13662
Idioma: | Inglês
Conteúdo: | In carnivorous fish species, zooplankton is one of the main food items in the early life stages and some fish species continue feeding on such food items further along the life stages even in the farming environment. In this study, the intake of natural food items was assessed in juvenile pirarucu Arapaima gigas reared in earthen ponds. Juvenile pirarucu (12.2 +- 4.32 g and 12.1 +- 1.13 cm) were stocked in fertilized earthen ponds (240 m²). For the analysis of the fish stomach content and plankton in the pond water, the fish and pond water were sampled weekly for 75 days and biweekly until the fish reached a mean weight of 750 g. Although artificial feed was used, pirarucu also ingested the natural food available in the pond water. Among the zooplankton, pirarucu demonstrated feeding preference for cladocerans despite the abundance of rotifers and copepods. Cladocerans were present in more than 80% of the stomach contents of fish up to 300 g and in 65%, 45% and 17% of fish of 301?500 g, 501?700 g and 701?900 g respectively. Copepods were present only in fish up to 500 g at low abundance. High ingestion of insects and plant material was observed in the stomach content of fish of all size classes. The results demonstrate that juvenile pirarucu ingest natural food available in the farming pond and suggests that the adoption of pond fertilization practices may have positive effects on fish growth performance.
Palavras-Chave: | Pond fertilization.
Thesagro: | Copepoda; Peixe de água doce; Pirarucu.
Thesaurus Nal: | Arapaima gigas; Cladocera.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Pesca e Aquicultura (CNPASA)
Exemplares: | CNPASA - (666-1) - UPC - AP - DD - CNPASA_AP08 -  - 2018.008 - DIS