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北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University >
第68巻 第2号 >

Antenna Length in the Hermit Crab Pagurus middendorffii : Sexual Dimorphism and Effect on Two Types of Male–male Competition

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Please use this identifier to cite or link to this item:http://doi.org/10.14943/bull.fish.68.2.27

Title: Antenna Length in the Hermit Crab Pagurus middendorffii : Sexual Dimorphism and Effect on Two Types of Male–male Competition
Authors: Morita, Ayumi Browse this author
Wada, Satoshi Browse this author →KAKEN DB
Keywords: Sexual dimorphism
Male–male competition
Scramble competition
Contest competition
Antennae
Hermit crab
Issue Date: 2-Aug-2018
Publisher: 北海道大学大学院水産科学研究院
Journal Title: 北海道大学水産科学研究彙報
Volume: 68
Issue: 2
Start Page: 27
End Page: 32
Abstract: Male–male competition is considered a mechanism for sexual selection and the evolution of sexual dimorphism in many animals. There are two types of male–male competition: scramble competition and contest competition. Many studies have focused on contest competition to explain sexual dimorphism of body size and/or weaponry, but it can also result from scramble competition. In this study, we described sexual dimorphism in antenna length of the hermit crab Pagurus middendorffii and tested the effects of antenna length in scramble and contest competition. Although antennae were longer in males than in females, longer antennae provided males no advantage in either competition. These results suggest sexual dimorphism of antenna length in this species is maintained by other ecological factors such as advantage in foraging at the rocky shore.
Type: bulletin (article)
URI: http://hdl.handle.net/2115/71150
Appears in Collections:北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University > 第68巻 第2号

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