| アイテムタイプ |
リポジトリ登録用アイテムタイプ（シンプル）(1) |
| 公開日 |
2025-12-12 |
| タイトル |
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タイトル |
Latitudinal patterns in a reproductive trait driven by sexual selection |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 著者 |
Morii, Ryota
| en |
Morii, Ryota
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| ja |
東京大学 大学院農学生命科学研究科 ［研究当時：岩手大学大学院 連合農学研究科（弘前大学配属）］
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Search repository
Yasuda, Shona
Nishino, Atsuo
Ikeda, Hiroshi
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Many organisms with broad distributions show latitudinal variations in morphological phenotypes and life history traits, such as body size and phenology, in relation to environmental changes such as temperature along latitude. Such variations have usually been considered the result of natural selection, but sexual selection may also lead to these latitudinal patterns. Although a recent study has shown the latitudinal pattern in the strength of male–male competition in medaka fish, such a latitudinal pattern related to sexual selection is rarely known in other organisms. Here, we show the latitudinal pattern of a reproductive trait driven by sexual selection in the Japanese black salamander (Hynobius nigrescens), where snout-vent length (SVL) in males predicts the outcome of male–male competition over egg sacs. First, we conducted phylogenetic analyses to examine the phylogenetic pattern along latitude. From the constructed phylogenetic tree, this species was split into five lineages that were roughly divided along latitude. We also used field surveys to examine whether the operational sex ratio (OSR: an index of the strength of male–male competition) varies across lineages with latitude. We found that the OSR was more biased toward males in a lineage distributed at lower latitudes due to its longer breeding period. We measured the SVLs of collected samples to determine if the latitudinal pattern also exists for SVL. Indeed, male SVLs were longer in lineages distributed at lower latitudes, whereas those in females did not differ among lineages. Our common garden experiment also showed that the individuals from a lineage distributed at lower latitudes had longer SVLs even when they grew under the same environmental conditions, suggesting that the latitudinal pattern in SVL is genetically determined. These results suggest that males at lower latitudes have evolved longer SVLs, driven by stronger male–male competition. Our study provides the first example, to the best of our knowledge, of a latitudinal pattern driven by sexual selection and its evolutionary determinant in detail in the wild. |
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言語 |
en |
| 書誌情報 |
en : Ecological Monographs
巻 95,
号 2,
p. e70017,
発行日 2025-06-19
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| ISSN |
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収録物識別子タイプ |
EISSN |
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収録物識別子 |
1557-7015 |
| ISSN |
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収録物識別子タイプ |
PISSN |
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収録物識別子 |
0012-9615 |
| DOI |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1002/ecm.70017 |
| 権利情報 |
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権利情報 |
© 2025 The Author(s). Ecological Monographs published by Wiley Periodicals LLC on behalf of The Ecological Society of America. |
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言語 |
en |
| 権利情報 |
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権利情報 |
This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
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言語 |
en |
| 出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 出版者 |
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出版者 |
Wiley |
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言語 |
en |
Ecological Monographs_2025_95(2)_e70017.pdf (25.5 MB)
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