Contribution à l'étude du cycle annuel de reproduction d'une population d'asterias rubens (Echinodermata, Asteroidea) du littoral belge

摘要: Abstract The histological changes of the gonads Asterias rubens during annual reproductive cycle are described. Beyond a juvenile stage, it is possible to define 6 different stages both in males and females. Moreover, females, evolution diameter oocytes followed. We also investigated using weight variations animals some their internal organs (gonads, pyloric caeca stomachs). were expressed two ways: organic indices, regression lines between organ total weight. results compared with those previous authors characteristics studied population defined. Pollution discussed as influence on small size degree sterility coastal starfish population. Finally, from study variations, appears that an inverse relation exists caecum gonad