Production year
1994
© Philippe JARNE/CNRS Images
19950001_0438
Etude du polymorphisme sexuel animal. Une partie des opérations de collecte des mollusques est réalisée lors de missions au Niger. L'escargot d'eau douce, qui sert d'hôte intermédiaire à l'agent responsable de la bilharziose, est généralement hermaphrodite, il existe chez certaines espèces des individus aphalliques, c'est-à-dire dépourvus de phallus. (Réf. Le Journal du CNRS Mai 95).
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1994
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