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Contribution à la biologie des Rajidae des côtes tunisiennes: 19. Raja polystigma Regan, 1923: relations taille-poids du corps, du foie et des gonades, rapports hépato-gonosomatique: coefficients de condition = Contribution to the biology of the Rajidae of the Tunisian coasts: 19. Raja polystigma Regan, 1923: relations between size and weight of body, liver and gonads. Hepato- and gonadosomatic relationship. Condition's coefficients
Capapé, C. (1980). Contribution à la biologie des Rajidae des côtes tunisiennes: 19. Raja polystigma Regan, 1923: relations taille-poids du corps, du foie et des gonades, rapports hépato-gonosomatique: coefficients de condition = Contribution to the biology of the Rajidae of the Tunisian coasts: 19. Raja polystigma Regan, 1923: relations between size and weight of body, liver and gonads. Hepato- and gonadosomatic relationship. Condition's coefficients. Cah. Biol. Mar. 21(3): 363-373
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
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Keyword
    Marine

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  • Capapé, C.

Abstract
    The analysis of the relationship between size and weight shows that the ponderal growth is higher in young rays than in adults. In adults, however, the increase in weight of the liver and gonads is faster, a sign of intense metabolic activity. Male and female cubic and relative condition coefficients depend on liver and gonad ponderal changes. The variations in the condition seem to be related to reproductive cycle changes; the roles of ecological factors and diet appear to be less important.

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