Differential effects of aerobic capacities on fight outcome in the Giant hissing cockroaches

Mowles, Sophie L. and Skicko, Ian M. and Sturrock, Craig J. and Durrant, Kate L. (2021) Differential effects of aerobic capacities on fight outcome in the Giant hissing cockroaches. Animal Behaviour, 173. pp. 241-246. ISSN 0003-3472

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Official URL: https://doi.org/10.1016/j.anbehav.2021.01.004


When animals engage in contests, ‘fights’ are usually noninjurious, involving either signals or trials of strength. Such fights end once an individual assesses that it is the weaker opponent, or it has reached the threshold level of costs it is prepared to pay. We investigated the agonistic behaviours performed and the relative costs paid by winners and losers during aggressive interactions in two species of Madagascan hissing cockroaches (the wide-horned cockroach, Gromphadorhina oblongonota, and the flat-horned cockroach, Aeluropoda insignis). By combining contest observations with measures of energetic expenditure and using X-ray computed tomography to compare the internal structure of the respiratory systems of the competitors, we revealed the differential physiological investment associated with resource-holding potential in these two species. Winners in G. oblongonota had larger respiratory volumes than predicted for their size compared to losers. Gromphadorhina oblongonota fought more aggressively and had larger respiratory systems overall than A. insignis, which engaged in less physical fighting. This indicates differential investment in fight tactics, and associated anatomy that may promote contest success. Invertebrate species at the upper limits of body size need to maintain efficient respiratory systems to support their size while also remaining subject to the influence of sexual selection.

Item Type: Journal Article
Keywords: aggression, cockroach, Gromphadorhina oblongonota, repeated signal, resource holding potential, stamina, X-ray computed tomography
Faculty: Faculty of Science & Engineering
SWORD Depositor: Symplectic User
Depositing User: Symplectic User
Date Deposited: 26 Nov 2020 09:29
Last Modified: 15 Mar 2021 13:07
URI: https://arro.anglia.ac.uk/id/eprint/706090

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