Abstract
Mating between different species is ubiquitous in nature. While environmental conditions and population density have been shown to affect the occurrence of heterospecific matings, much less is known about the potential role of individual characteristics. Here, we examined the association between boldness and mate choice to con- and heterospecifics in a cyprinid fish (Pseudaspius sachalinensis) which naturally hybridizes with congeneric species. We found a positive correlation between risk-taking tendency in an emergence test and a preference for heterospecific females. This finding suggests that bolder males may prefer novel phenotypes or are likely to make a wrong choice for their mating partners.
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Data availability
All data used in this study and codes used in analyses are deposited in the appendix.
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Acknowledgements
We are grateful to O. Kishida, T. Ishii and H. Sugiyama for setting up the experimental system, M. Kudoh, K. Takahashi, T. Tsuruya, and K. Tomita for sampling assistance, two anonymous reviewers for constructive and helpful comments, and C. Ayer and J. L. Anders for English check.
Funding
Sasakawa Scientific Research Grant (29-545), the Fujiwara Natural History Foundation, and a Grant-in-Aid for a JSPS Research Fellow (18J10096) to KA.
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KA conceived and performed the study, and KA and IK wrote the manuscript.
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The authors declare no competing interests.
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The experiment and sampling were approved by the Institutional Animal Care and Use Committee of Hokkaido University (approval no. 28-2) and by the local government, respectively.
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Atsumi, K., Koizumi, I. Are bolder individuals more likely to choose heterospecific mates? A test in cyprinid fishes. J Ethol 38, 247–251 (2020). https://doi.org/10.1007/s10164-020-00646-2
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DOI: https://doi.org/10.1007/s10164-020-00646-2