The Israeli Journal of Aquaculture Bamidgeh 57(1), 2005, 10-18

 
EFFECTS OF PRE-WEANING FEEDING FREQUENCY ON 
GROWTH, SURVIVAL, AND DEFORMATION OF 
SENEGALESE SOLE, SOLEA SENEGALENSIS (KAUP, 1858) 


Sofia Engrola*, Luis E.C. Conceicao, Paulo J. Gavaia, M. Leonor Cancela 
and Maria T. Dinis
 

CCMAR, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal

(Received 10.7.04, Accepted 29.8.04)


Key words: feeding frequency, growth, malformations, Senegalese sole, survival


Abstract


Despite much interest in the production of Senegalese sole (Solea senegalensis) in southern 
Europe, weaning of this species onto artificial diets is problematic and varying results are 
obtained. The aim of this study was to test two feeding frequencies during a 13-day pre-weaning period and assess their impact on the growth and survival of Senegalese sole. Postlarvae were fed Artemia metanauplii with a peristaltic pump every hour for 12 hours per day or twice daily (morning and late afternoon). Both groups were suddenly weaned onto a commercial diet for an additional 30 days. At the end of the experiment, the relative growth rate and final dry weight were significantly higher and the survival significantly lower in the 12-hour treatment than in the twice-daily treatment. The feeding frequency had no effect on condition factor. The incidence of deformities was about 80% in both treatments. 


* Corresponding author. Tel.: +351-289-800900; fax: +351-289-818353; e-mail: sengrola@ualg.pt

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