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Voies de diversification de l'élevage de la carpe Cyprinus carpio L. en Lorraine : avantages, contraintes et limites

Abstract : Fish producers are trying to develop new products and processing of carp Cyprinus carpio L. to market fillets seems to be one the solutions that finds customer acceptance. Sexual maturation lowered condition index and filleting yield for females. A relationship was determined between temperature (degree-days) and female total weight to characterize maturation stages. Floating net cages were used to grow or maintain carp for regular availability of fish. Market size carp was obtained three or four months earlier than in extensive production. Two predictive models of carp growth were established and their validity was tested. The influence of food acceptance and of decreasing number of fishes densities limiting production are discussed. The impact of the cages on water and sediment quality were assessed. The budget of solid matter, nitrogen and phosphorus (from both food and faeces) revealed that these elements are rapidly utilized in eutrophic ponds. The impact of environmental conditions on fish culture was investigated. Global toxicity of water was put in relation to the fish densities in the cages. Fouling on floating net cages was quantified. A predictive model of fouling development was determined as a bivariable logistic function of submersion time and net surface. A possibility for combining intense rearing in floating net cages and extensive fish production is described. Advantages and disadvantages are discussed
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Submitted on : Tuesday, April 24, 2018 - 4:13:27 PM
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Nathalie Dubost-Ebersveiller. Voies de diversification de l'élevage de la carpe Cyprinus carpio L. en Lorraine : avantages, contraintes et limites. Biologie animale. Université Paul Verlaine - Metz, 1996. Français. ⟨NNT : 1996METZ053S⟩. ⟨tel-01777175⟩

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