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Effet de l'alimentation et de l'ablation du pédencule oculaire sur la qualité des pontes et des larves de Penaeus japonicus Bate, 1888 Redón, M.J.; San Feliu, J.M. (1993). Effet de l'alimentation et de l'ablation du pédencule oculaire sur la qualité des pontes et des larves de Penaeus japonicus Bate, 1888, in: Barnabé, G. et al. (Ed.) Production, environment and quality: Proceedings of the International Conference Bordeaux Aquaculture '92, Bordeaux, France, March 25-27, 1992. EAS Special Publication, 18: pp. 483-490 In: Barnabé, G.; Kestemont, P. (Ed.) (1993). Production, environment and quality: Proceedings of the International Conference Bordeaux Aquaculture '92, Bordeaux, France, March 25-27, 1992. Special Publication European Aquaculture Society, 18. European Aquaculture Society: Gent. 587 pp. In: Special Publication European Aquaculture Society. European Aquaculture Society: Bredene. ISSN 0774-0689

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Marien/Kust

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Auteurs		Top
Redón, M.J. San Feliu, J.M.

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Abstract

This is a 3-year experiment in which the effect of different diets on the biochemical composition of the gonad, eggs and larvae of prawns as well as the eyestalk ablation or non ablation have been studied. Our preliminary results are presented in terms of numbers of spawnings,hatching rate and percentage of metamorphosis to postlarvae 3, related to broodstock nutrition and eyestalk ablation or non ablation. Research was performed for 175 days and there were no significant differences in weight and length among the eight groups of 20 individuals at the beginning. Sex ratio was 1/1. The diet was made from a compounded commercial diet (Alma) and polichaetes in four groups, whereas the others were fed with mussels and polychaetes. Eyestalk ablation was performed on males and females in two groups of each diet. Male eyestalk ablation decreased the mating index: 2.73% in eyestalk ablation groups and 47.69% in unablated groups. The majority of spawnings, 47 from 69, were from unablated prawns. Individuals fed with mussels and polychaetes procured 28 of 47 spawns. Hatching rate was 8.04% in ablated groups versus 40.07% in unablated groups, and only larvae originating from these latter groups metamorphosed into P3. There were only rematurations in individuals fed with the natural food.

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