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Recherche Du Lieu De Synthese De La Pheromone Sexuelle De Carcinus Maenas (L.) (Decapoda, Reptantia)

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image of Crustaceana

A sexual pheromone is released with the urine of female C. maenas, from moulting stage D2 to A2, which stimulates the male antennules. Because hemolymph samples and ecdyson solutions are inactive, the site of pheromone synthesis seems to be located in the excretory organs. A careful histological comparison between males and females, as well as between intermoult and moulting females does not show any significant differences in the three main parts of the excretory organs (coelomosac, labyrinth and bladder). On the contrary a small exocrine ectodermal gland opens into the distal section of the ureter, in close proximity to the urinary pore. It is found in both sexes but appears much more developed and active in the female. The topographical location and morphological characteristics of the gland suggest its pheromonal nature.

Affiliations: 1: Département de Biologie Animale, Facultés Universitaires, 61, rue de Bruxelles, B-5000 Namur, Belgique


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