Male courtship cycles in three species of tropical Ilyoplax crabs (Decapoda,Brachyura, Ocypodidae) |
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Authors: | Takeharu Kosuge Sombat Poovachiranon Minoru Murai |
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Institution: | (1) Amakusa Marine Biological Laboratory, Kyushu University, 863-25 Tomioka, Amakusa, Kumamoto, Japan;(2) Phuket Marine Biological Centre, 83000 Phuket, Thailand;(3) Department of Biology, Kyushu University, 812 Hakozaki, Higashi, Fukuoka, Japan |
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Abstract: | The courtship behaviour and cycles of male courtship activity and colouration of Ilyoplax orientalis, I. delsmani and I. gangetica were studied in the field in Malaysia and Thailand. Each species had a distinctive chela waving or beckoning display. Depending on species, the chelipeds, carapaces, or both of waving males blanched to white in contrast to the cryptic colour of nonwaving males and females. All three of these tropical Ilyoplax exhibited semilunar cycles in male waving activity at the colony level. It was confirmed for I. orientalis that individual males cycled each semilunar period between waving and non-waving phases and exhibited different behaviour toward females during these two behavioural phases. |
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Keywords: | mating behaviour Ilyoplax Ocypodidae Malaysia Thailand waving display semilunar cycle |
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