| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2026-04-07 |
| タイトル |
|
|
タイトル |
Ecological function of the Ariake Bay as a scalloped hammerhead shark (Sphyrna lewini) nursery in the northwestern Pacific |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題URI |
Elasmobranchs |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題URI |
Early growth |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題URI |
Neonates |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題URI |
Nursery habitats |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題URI |
Salinity |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題URI |
Carcharhiniformes |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
UDC |
|
主題URI |
Umbilical scar |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 著者 |
Yamaguchi, Atsuko
Ogino, Yoshimi
Hara, Kojiro
Nakamura, Masayuki
Watanabe, Mao
Furumitsu, Keisuke
|
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
The scalloped hammerhead (Sphyrna lewini), a cosmopolitan shark inhabiting temperate and tropical waters, is highly vulnerable to fisheries owing to late maturity and low reproductive output. Although nurseries have been identified in the Americas and Australia, ecological knowledge of individuals in the northwestern Pacific remains limited. We analyzed 1167 individuals collected as bycatch across 4 regions of southwestern Japan, with a focus on the Ariake Bay. Size- and season-specific occurrence patterns, umbilical scar condition, and vertebral age estimation revealed that the shallow inner Ariake Bay functions as a nursery—the first one to be documented in the northwestern Pacific. Age-0 individuals, born May–June, comprised 88 % of the inner bay population and stayed 3 months to 2 years before dispersing. Larger mature individuals > 10 years were concentrated at the bay mouth, with intermediate sizes and ages largely absent. Age-0 individuals occurred in environments with water temperatures of 18.6–27.3 °C and salinities of 25.9–32.8. Condition factor and hepatosomatic index analyses suggested that this nursery, characterized by turbid and moderately saline waters, provides favorable nutritional conditions in addition to predator protection. Substantial annual bycatch resulting from the eagle ray control program highlights strong fishing pressure on juveniles. Overall, we identified the Ariake Bay as a highly productive nursery of global significance, thereby advancing current understanding of S. lewini habitat use in the northwestern Pacific. Protecting this habitat is essential for sustaining regional populations and informing conservation strategies for this critically endangered species. |
|
言語 |
en |
| 書誌情報 |
en : Global Ecology and Conservation
巻 67,
p. art. no. e04127,
発行日 2026-02-26
|
| 出版者 |
|
|
出版者 |
Elsevier B.V. |
|
言語 |
en |
| ISSN |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
23519894 |
| DOI |
|
|
関連タイプ |
isIdenticalTo |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
https://doi.org/10.1016/j.gecco.2026.e04127 |
| 権利 |
|
|
権利情報 |
© 2026 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
|
言語 |
en |
| 著者版フラグ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 引用 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
Global Ecology and Conservation, 67, art. no. e04127; 2026 |
|
言語 |
en |
GEC67_e04127.pdf (9.1 MB)
