Affiliation:
1. Universidade do Estado do Rio de Janeiro, Brazil
2. Universidade Estadual do Oeste do Paraná, Brazil
Abstract
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.
Subject
Aquatic Science,Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics
Reference39 articles.
1. Directed motion in the sea: efficient swimming by reef fish larvae;Armsworth PR;J Theor Biol,2001
2. Influência de diferentes níveis de luminosidade sobre o desempenho de larvas de Jundiá (Rhamdia quelen) (Quoy e Gaimard, 1824) (Pisces: Pimelodidae);Behr ER;Acta Sci,1999
3. The influence of egg size on herring larvae (Clupea harengus L.);Blaxter JHS;ICES J Mar Sci,1963
4. The early life history of fish;Blaxter JHS,1974
5. Crescimento e sobrevivência de larvas do jundiá, Rhamdia quelen, alimentadas com alimento vivo enriquecido e dieta artificial;Borges Neto PG;Rev Bras Cienc Vet,2013
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