Female Mate Preference in Goby Eviota prasina : Do Secondary Sexual Traits Influence Female Choice?(Ecology)
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概要
- 論文の詳細を見る
Males of the small gobiid fish Eviota prasina have longer dorsal fins than females and use their dorsal fins for courtship displays and male-male competition. We examined the influence of male dorsal fin length as well as the frequency of courtship displays on female mate preference using sequential choice experiments. Females responded more frequently to courting males with longer dorsal fins than males with shorter dorsal fins. This indicates female mate preference on the basis of male dorsal fin length in this goby. In addition, the logistic regression analysis showed that male courtship frequency positively influenced female mate preference. Since males incur costs to produce and maintain longer dorsal fins and to perform frequent courtship displays, these secondary sexual traits may indicate the quality of physical characteristics. In E. prasina, only males conducted parental care for eggs in their nests. Therefore, females may be able to ensure greater survival rates as well as higher genetic quality of their offspring by choosing males with better qualities based on these male traits.
- 社団法人日本動物学会の論文
- 2004-08-25
著者
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Karino Kenji
Department Of Biology Tokyo Gakugei University
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Sekiya Yuko
Department of Biology, Tokyo Gakugei University
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Sekiya Yuko
Department Of Biology Tokyo Gakugei University
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