Contribution à la biologie des Rajidae des côtes Tunisiennes: XVII. Raja radula Delaroche, 1809: relations taille - poids du corps, du foie, des gonades et des glandes nidamentaires; poids du corps - poids du foie, des gonades et des glandes nidamentaires. Coefficients de condition. Rapports hepato, gono et nidamentosomatiques.
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Author
Capapé, ChristianDate
1979
Metadatos
Mostrar el registro completo del ítemAlternative Title
Contribution to the biology of the Rajidae of the Tunisian coasts. 17. Raja radula Delaroche, 1809: size - body relationships, liver, gonads and nidamental glands weight; body weight - liver, gonads and nidamental glands. Condition coefficients. Hepatic, gonadic and nidamental-somatic ratiosAbstract
A study of size - total weight relationships and cubic coefficient condition points out that total weight increases with size more rapidly in the adults of both sexes than in the young. Size of liver, weight and size of gonads, weight relationships present similar characteristics but are subjected to important monthly changes in adults males and females. The analysis of relative coefficient condition points out that breeding takes an important part in these changes which increase in females owing to the weight of nidamental glands and genital tracts. The part of ecological factors is not to be omitted but it is difficult to delimite it considering the lack of precise data. The part of diet is more apparent because there is relation with breeding in one hand and with zoological biotops in the other hand.Journal
Bulletin de l'Institut National Scientifique et Technique d'Océanographie et de Pêche de SalammboVolume
6Issue/Article Nr
1-4Page Range
pp 63-92Colecciones