Multimodal communication in crayfish: sex recognition during mate search by male Austropotamobius pallipes

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Abstract:



The role of multiple signals in sex recognition in the crayfish Austropotamobius pallipes was investigated by analyzing the main channels (chemical or chemical plus visual) used by males during mate search. The behavioral responses of males were recorded when they were exposed to four different treatments: female odor only, male odor only, female odor plus visual cues, and male odor plus visual cues. Males did not respond to chemical cues alone emitted by a female, but required both chemical and visual stimuli. The high-flow conditions of the aquatic habitat occupied, the restricted mating period, and the low density of the population examined may explain the use of both cues in sex recognition by males.

L'utilisation simultanée de plusieurs signaux pour l'identification du sexe a été étudiée chez l'écrevisse Austropotamobius pallipes par analyse des principales voies de reconnaissance (chimiques, ou chimiques et visuelles) qu'utilisent les mâles à la recherche de partenaires. Le comportement des mâles a été observé à la suite de quatre traitements : odeurs de femelles seulement, odeurs de mâles seulement, odeurs de femelles avec stimulus visuels, odeurs de mâles avec stimulus visuels. Les résultats démontrent que les mâles ne réagissent pas aux stimulus chimiques émis par des femelles, à moins qu'ils ne soient émis en même temps que des stimulus visuels. Le débit abondant dans l'habitat aquatique occupé, la brièveté de la période d'accouplement et la faible densité de la population étudiée peuvent expliquer pourquoi les mâles requièrent deux types de signaux pour reconnaître les femelles.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: November 1, 2002

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  • Published since 1929, this monthly journal reports on primary research contributed by respected international scientists in the broad field of zoology, including behaviour, biochemistry and physiology, developmental biology, ecology, genetics, morphology and ultrastructure, parasitology and pathology, and systematics and evolution. It also invites experts to submit review articles on topics of current interest.
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