dc:title
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Weakly aggressive behaviour towards nymphs in the cockroach Schultesia nitor (Blattaria: Zetoborinae) |
dc:creator
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Van Baaren, J. |
dc:creator
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Deleporte, P. |
dc:creator
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Vimard, A. |
dc:creator
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Biquand, V. |
dc:creator
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Pierre, J.-S. |
dc:subject
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aggressive behaviour |
dc:subject
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cockroaches |
dc:subject
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mother-offspring interactions |
dc:subject
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Schultesia |
dc:description
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This paper describes aggressive behaviour in the cockroach Schultesia nitor, a tropical forest species living in bird nests. Young S. nitor nymphs are known to show active dispersal while old nymphs and adults are contrastingly strongly gregarious, a combination of features never observed in other cockroach species. Our laboratory experiments using video recording of confrontations between
pairs show that aggressive behaviour towards conspecific nymphs is not exhibited towards nymphs of the species Phoetalia pallida, and thus can be considered species specific in S. nitor. But, it is not kin oriented: the mother and all adults of both sexes in different physiological states exhibit this behaviour as well. Six types of aggressive interactions were discriminated, occurring in agesymmetric pairs of nymphs and adults. Even more frequent aggression was exhibited by adults and last instar nymphs towards younger nymphs of all instars. The frequency of aggressive acts and types of aggressive interactions varied according to sex and
size of the two interacting individuals. The possible function and evolution of this behaviour is discussed, with emphasis on the difficulty of interpreting obvious but weak and not kin-biased aggression. |
dc:publisher
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Wiley-Blackwell |
dc:contributor
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EthoS, UMR 6552 |
dc:contributor
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CNRS |
dc:contributor
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Université de Rennes 1 |
dc:date
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2007 |
dc:type
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Article scientifique |
dc:format
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dc:identifier
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Aggressive Behavior, 2007, 33, 498-507
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dc:language
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dc:rights
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