Data/hora: 05/06/2024 16:07:07

Provedor de dados: | 83
País: | Brazil
Título: | Effects of delayed first feeding on growth of the silver catfish larvae Rhamdia voulezi (Siluriformes: Heptapteridae)
Autores: | Lima,Ariane F. de; Andrade,Fernanda F.; Pini,Suelen Fernanda R.; Makrakis,Sergio; Makrakis,Maristela C.
Data: | 2017-01-01
Ano: | 2017
Palavras-chave: | Exogenous feeding; Initial feeding; Larval development; Point-of-no-return; Starvation.
Resumo: | ABSTRACT The effects of the timing of first feeding on the point-of-no-return (PNR) and growth of laboratory reared silver catfish Rhamdia voulezi larvae were studied. The experiment began immediately after the complete absorption of the yolk sac, 3 days after hatching (DAH). The food was provided for the first time on 3rd, 4th, 5th, 6th, 7th, 8th, and 9th DAH. Zooplankton and newly-hatched Artemia spp. were used to feed the larvae. To evaluate the effect of food deprivation on growth, the standard length and weight of 594 larvae were assessed. Larval growth was significantly affected by the time of first exogenous feeding. The larvae fed from 3rd to 5th DAH showed a significantly higher development than those fed from 6th DAH. The larvae reached the PNR on 6th DAH. Survival and larval growth strongly depended on the timing of initial feeding. In order to avoid potential mortality by starvation and obtain good growth, the silver catfish larvae R. voulezi must establish successful initial feeding within 5 days after hatching.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200205
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/1982-0224-20160027
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.15 n.2 2017
Fonte: | info:eu-repo/semantics/openAccess