Extra-pair mating in a socially monogamous and paternal mouthbrooding cardinalfish
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KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Marine Science Program
Red Sea Research Center (RSRC)
Permanent link to this recordhttp://hdl.handle.net/10754/631945
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AbstractMany vertebrates form monogamous pairs to mate and care for their offspring. However, genetic tools have increasingly shown that many offspring arise from matings outside of the monogamous pair bond. Social monogamy is relatively common in coral reef fishes, but there have been relatively few studies that have confirmed monogamy or extra-pair reproduction, either for males or females. Here long-term observations and genetic tools were applied to examine the parentage of embryos in a paternally mouthbrooding cardinalfish, Sphaeramia nematoptera. Paternal care in fishes, such as mouth brooding, is thought to be associated with a high degree of confidence in paternity. Two-years of observations confirmed that S. nematoptera form long-term pair bonds within larger groups. However, genetic parentage revealed extra-pair mating by both sexes. Of 105 broods analysed from 64 males, 30.1% were mothered by a female that was not the partner and 11.5% of broods included eggs from two females. Despite the high paternal investment associated with mouthbrooding, 7.6% of broods were fertilised by two males. Extra-pair matings appeared to be opportunistic encounters with individuals from outside the immediate group. We argue that while pair formation contributes to group cohesion, both males and females can maximise lifetime reproductive success by taking advantage of extra-pair mating opportunities. This article is protected by copyright. All rights reserved.
CitationRueger T, Harrison HB, Gardiner NM, Berumen ML, Jones GP (2019) Extra-pair mating in a socially monogamous and paternal mouthbrooding cardinalfish. Molecular Ecology. Available: http://dx.doi.org/10.1111/mec.15103.
SponsorsWe thank Tiffany Sih, James White, Patrick Smallhorn-West, Mathew Vickers and Mariana Alvarez-Noriega for field assistance. Field work was supported by Mahonia Na Dari Research and Education Centre, Kimbe Bay, Papua New Guinea. We thank the Tamare-Kilu communities for granting access to their reefs for this study. We thank fouranonymous reviewers for helpful comments on the manuscript. This study was conducted in accordance with JCU Ethics Committee, approval number A1847.
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Rueger, T., Harrison, H. B., Gardiner, N. M., Berumen, M. L., & Jones, G. P. (2019). Data from: Extra-pair mating in a socially monogamous and paternal mouthbrooding cardinalfish (Version 1) [Data set]. Dryad. https://doi.org/10.5061/DRYAD.557BR15. DOI: 10.5061/dryad.557br15 Handle: 10754/662360