Elevated predation risk changes mating behaviour and courtship in a fiddler crab

Abstract

Restricted accessMoreSectionsView PDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmail Cite this article Koga Tsunenori, Backwell Patricia R. Y., Jennions Michael D. and Christy John H. 1998Elevated predation risk changes mating behaviour and courtship in a fiddler crabProc. R. Soc. Lond. B.2651385–1390http://doi.org/10.1098/rspb.1998.0446SectionRestricted accessElevated predation risk changes mating behaviour and courtship in a fiddler crab Tsunenori Koga Tsunenori Koga Department of Biology, Faculty of Science, Kyushu University, Hakozaki, Japan Google Scholar Find this author on PubMed Search for more papers by this author , Patricia R. Y. Backwell Patricia R. Y. Backwell SmithsonianTropical Research Institute, Apartado 2072, Balboa, Ancon, Republic of Panama () Google Scholar Find this author on PubMed Search for more papers by this author , Michael D. Jennions Michael D. Jennions SmithsonianTropical Research Institute, Apartado 2072, Balboa, Ancon, Republic of Panama () Google Scholar Find this author on PubMed Search for more papers by this author and John H. Christy John H. Christy SmithsonianTropical Research Institute, Apartado 2072, Balboa, Ancon, Republic of Panama () Google Scholar Find this author on PubMed Search for more papers by this author Tsunenori Koga Tsunenori Koga Department of Biology, Faculty of Science, Kyushu University, Hakozaki, Japan Google Scholar Find this author on PubMed Search for more papers by this author , Patricia R. Y. Backwell Patricia R. Y. Backwell SmithsonianTropical Research Institute, Apartado 2072, Balboa, Ancon, Republic of Panama () Google Scholar Find this author on PubMed Search for more papers by this author , Michael D. Jennions Michael D. Jennions SmithsonianTropical Research Institute, Apartado 2072, Balboa, Ancon, Republic of Panama () Google Scholar Find this author on PubMed Search for more papers by this author and John H. Christy John H. Christy SmithsonianTropical Research Institute, Apartado 2072, Balboa, Ancon, Republic of Panama () Google Scholar Find this author on PubMed Search for more papers by this author Published:07 August 1998https://doi.org/10.1098/rspb.1998.0446AbstractThe fiddler crab, Uca beebei, lives in individually defended burrows, in mixed-sex colonies on intertidal mud flats. Avian predation is common, especially of crabs unable to escape into burrows. Mating pairs form in two ways. Females either mate on the surface at their burrow entrance (‘surface mating’) or leave their own burrow and sequentially enter and leave (‘sample’) courting males' burrows, before staying in one to mate underground (‘burrow mating’). We tested whether perceived predation risk affects the relative frequency of these mating modes. We first observed mating under natural levels of predation during one biweekly, semi–lunar cycle. We then experimentally increased the perceived predation risk by attracting grackles (Quiscalus mexicanus) to each half of the study site in two successive biweekly cycles. In each experimental cycle, crabs were significantly less likely to mate on the side with more birds. Moreover, on the side with elevated predation risk, the number of females leaving burrows to sample was greatly reduced relative to the number of females that surface–mated. Males waved less and built fewer mud pillars, which attract females, when birds were present. We discuss several plausible proximate explanations for these results and the effect of changes in predation regime on sexual selection. 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JENNIONS M and PETRIE M (2007) Why do females mate multiply? A review of the genetic benefits, Biological Reviews, 10.1111/j.1469-185X.1999.tb00040.x, 75:1, (21-64) This Issue07 August 1998Volume 265Issue 1404 Article InformationDOI:https://doi.org/10.1098/rspb.1998.0446Published by:Royal SocietyPrint ISSN:0962-8452Online ISSN:1471-2954History: Published online07/08/1998Published in print07/08/1998 License: Citations and impact Keywordssexual selectionmating tacticsUcafiddler crabspredationfemale choice Large datasets are available through Proceedings B's partnership with Dryad