| アイテムタイプ |
学術雑誌論文 / journal article(1) |
| 公開日 |
2024-12-06 |
| タイトル |
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|
タイトル |
Small differences between primary and breeding sex ratios at the largest loggerhead turtle rookery in the North Pacific |
|
言語 |
en |
| 作成者 |
Hatase, Hideo
Watanabe, Shun
Kobayashi, Toru
|
| 言語 |
|
|
言語 |
eng |
| キーワード |
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|
主題 |
Sea turtle, Incubation environment, Primary sex ratio, Offspring survival, Parentage analysis, Breeding sex ratio |
| 内容記述 |
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内容記述タイプ |
Abstract |
|
内容記述 |
Elucidating how sex ratio changes as a cohort ages may aid with understanding the relative recruitment of male and female adults to a population. In sea turtles, sex is determined by the incubation temperature, with males and females produced at low and high temperatures, respectively. At rookeries exposed to high incubation temperatures, the primary sex ratios are thus skewed toward females. However, because very high incubation temperatures also negatively affect the survival-related traits of female hatchlings, the female bias may be mitigated as the cohort matures and the adult sex ratio may be more male-biased than primary sex ratios. Here, we examined whether sex ratio changes from hatchlings to breeding adults at Yakushima Island, Japan, the largest loggerhead turtle Caretta caretta rookery in the North Pacific, which is not exposed to high incubation temperatures. The mean (±SD) primary sex ratio (% female) during 1975–2022, estimated from incubation durations linked to sand temperatures, were 24.7 ± 13.6%. Based on genotype data at three microsatellite loci from 26 females and their 291 offspring sampled in 2020 and 2021, we detected multiple paternity in five clutches (19.2%) and estimated 34 unique sires, which provided a breeding sex ratio (% female) of 43.3%. Small differences between primary and breeding sex ratios suggest similar survival rates for male and female offspring. This rookery is unusual in that it has male biased hatchling production, whereas most sea turtle rookeries have female biased hatchling production. The Yakushima rookery is likely resilient to climate warming. |
|
言語 |
en |
| 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 |
|
資源タイプ |
journal article |
| 出版タイプ |
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|
出版タイプ |
AM |
|
出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
| 関連情報 |
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関連タイプ |
isVersionOf |
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|
識別子タイプ |
DOI |
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|
関連識別子 |
https://doi.org/10.3354/meps14734 |
| 収録物識別子 |
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収録物識別子タイプ |
PISSN |
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収録物識別子 |
01718630 |
| 収録物識別子 |
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収録物識別子タイプ |
EISSN |
|
収録物識別子 |
16161599 |
| 書誌情報 |
en : Marine ecology progress series
号 750,
p. 167-179,
発行日 2024-12-05
|
AA10608952-20241205-0167.pdf (1 MB)
