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- W4281490175 abstract "Abstract The evolution of male-male aggression is of interest because at its extreme it can be very energetically costly, leave males vulnerable to preadtors, and give rise to weaponry such as exaggerated traits. In grasshoppers (Acrididae), one group stands out as exceptionally aggressive, the skyhoppers ( Kosciuscola ) in which males bite, kick, mandible flare, and wrestle each other for access to females or when females are laying eggs. In this study we asked whether there is variation in aggressive behaviour among four skyhopper species and aimed to determine whether the traits used in fighting bear signatures of sexual selection in their size, variability, and allometric scaling. We found clear differences in the numbers and types of aggressive behaviours among species. Kosciuscola tristis and K. usitatus were the most aggressive, K. cognatus was the least aggressive, and K. tristis was the only species that performed the ‘mandible flare’ behaviour. Mandible size was larger among the three species that showed aggressive behaviour, all except K. cognatus , and was negatively allometric for all species possibly suggesting a functional size constraint. Pronotum size was different among most species and K. tristis ’ pronotum was the largest and borderline positively allometric perhaps suggesting that pronotum size is related to aggressive behaviour but the nature of that relationship remains obscured. Our study suggests that further work investigates skyhoppers’ aggressive behaviour and how it varies with ecology, and paves the way for establishing them as a model system in the evolution of aggressive behaviour." @default.
- W4281490175 created "2022-05-26" @default.
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- W4281490175 date "2022-05-25" @default.
- W4281490175 modified "2023-09-26" @default.
- W4281490175 title "Aggressive behaviour in the skyhoppers of the Australian Alps" @default.
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- W4281490175 doi "https://doi.org/10.1007/s10682-022-10185-6" @default.
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