Supplementary material from "Family-specific chemical profiles provide potential kin recognition cues in the sexually cannibalistic spider Argiope bruennichi"
Posted on 2021-07-15 - 08:17
Kin recognition, the ability to detect relatives, is important for cooperation, altruism and also inbreeding avoidance. A large body of research on kin recognition mechanisms exists for vertebrates and insects, while little is known for other arthropod taxa. In spiders, nepotism has been reported in social and solitary species. However, there are very few examples of kin discrimination in a mating context, one coming from the orb-weaver Argiope bruennichi. Due to effective mating plugs and high rates of sexual cannibalism, both sexes of A. bruennichi are limited to a maximum of two copulations. Males surviving their first copulation can either re-mate with the current female (monopolising paternity) or leave and search for another. Mating experiments have shown that males readily mate with sisters but are more likely to leave after one short copulation as compared to unrelated females, allowing them to search for another mate. Here, we ask whether the observed behaviour is based on chemical cues. We detected family-specific cuticular profiles that qualify as kin recognition cues. Moreover, correlations in the relative amounts of some of the detected substances between sexes within families indicate that kin recognition is likely based on subsets of cuticular substances, rather than entire profiles.
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Weiss, Katharina; Schneider, Jutta M. (2021). Supplementary material from "Family-specific chemical profiles provide potential kin recognition cues in the sexually cannibalistic spider Argiope bruennichi". The Royal Society. Collection. https://doi.org/10.6084/m9.figshare.c.5513339.v1