SciELO - Scientific Electronic Library Online

 
vol.38 issue8Biological response of rats fed with different multimistura formulationsPoultry by-product meal in lambari fingerlings diet author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Ciência Rural

Print version ISSN 0103-8478

Abstract

ROCHA, Andréa Ferretto da; CARVALHO, Cristina Vaz Avelar de  and  SAMPAIO, Luís André. Production of Brazilian flounder Paralichthys orbignyanus juveniles: the effect of co-feeding period during the weaning. Cienc. Rural [online]. 2008, vol.38, n.8, pp. 2334-2338. ISSN 0103-8478.  http://dx.doi.org/10.1590/S0103-84782008000800037.

Weaning is a critical period for production of marine fish juveniles. The objective of this research was to evaluate the effect of co-feeding on survival, growth, and cost of production after the weaning of juveniles of Brazilian flounder Paralichthys orbignyanus. Juvenile flounder (32 days after hatching) were fed on HUFA enriched Artemia and subsequently three periods of co-feeding with dry diets (15, 20, and 25 days) were tested, a control group, where flounder were fed exclusively on Artemia was also followed until the end of the experiment. Juveniles fed on Artemia showed significantly higher (P<0.05) survival (82%), weight (480±157mg) and total length (35.5±5.0mm) than flounder weaned into dry diets, independent of the co-feeding period. Growth was similar (P>0.05) for juveniles fed on dry diets, but a higher survival rate was registered when the co-feeding period was longer. The results obtained demonstrate that flounder fed exclusively on Artemia have a better performance than those weaned into dry diets. However, unitary cost of production is reduced when juveniles are weaned 58 days after hatching.

Keywords : co-feeding; weaning; Paralichthys orbignyanus; artificial diets.

        · abstract in Portuguese     · text in Portuguese     · pdf in Portuguese