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Male mate choice in hermit crabs: prudence by inferior males and simple preference by superior males

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Title: Male mate choice in hermit crabs: prudence by inferior males and simple preference by superior males
Authors: Wada, Satoshi Browse this author →KAKEN DB
Arashiro, Yuusei Browse this author
Takeshita, Fumio Browse this author
Shibata, Yasutoki Browse this author
Keywords: crustacean
precopulatory guarding
prudent mate choice
sexual selection
Issue Date: Jan-2011
Publisher: Oxford University Press
Journal Title: Behavioral Ecology
Volume: 22
Issue: 1
Start Page: 114
End Page: 119
Publisher DOI: 10.1093/beheco/arq183
Abstract: In species with both male-male competition and male mate choice, inferior males may make different mate choice decisions from superior males. Males of the intertidal hermit crab, Pagurus middendorffii, are known to conduct precopulatory guarding and to adjust the threshold for guarding according to social parameters, such as encounter rate with females, competitor size, and sex ratio. Larger males are stronger in male--male competition during guarding in this species. We here tested whether male of P. middendorffii initially guarding a smaller female exchanged partners when the male encountered a larger receptive female and whether large and small males chose potential mates on the basis of body size and/or time needed for guarding when a male simultaneously encounters 2 females. When a male guarding a smaller receptive female encountered a larger receptive female, the male assessed the larger female and exchanged his partner only in cases of a large difference in body size between the 2 females, suggesting that males of this species could choose their mates based on female quality even during guarding. When a male simultaneously encountered 2 receptive females, small males showed the prudent mate choice by balancing female traits between larger body size and shorter time until breeding, whereas large males showed preference for larger females. The distinct preference exhibited by males of different size classes is concluded to be an adaptive response to the size-dependent risk of losing the female during guarding.
Rights: This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Behavioral Ecology following peer review. The definitive publisher-authenticated version Behavioral Ecology (2011) 22 (1): 114-119 is available online at: http://beheco.oxfordjournals.org/content/22/1/114.
Type: article (author version)
URI: http://hdl.handle.net/2115/48554
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 和田 哲

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