| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2024-02-09 |
| タイトル |
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タイトル |
Investigation of inter-annual variation in the feeding habits of Japanese sardine (Sardinops melanostictus) and mackerels (Scomber spp.) in the Western North Pacific based on bulk and amino acid stable isotopes |
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言語 |
en |
| 言語 |
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言語 |
eng |
| キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Kuroshio-Oyashio transition; amino acids; stable isotope; trophic position Japanese sardine; mackerels; feeding habit; inter-annual variation |
| 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 |
オノ, ヨウスケ
| en |
Ono, Yosuke
Tokyo University of Agriculture and Technology
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| ja |
オノ, ヨウスケ
東京農工大学
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| ja-Kana |
オノ, ヨウスケ
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Search repository
ウメザワ, ユウ
| en |
Umezawa, Yu
Tokyo University of Agriculture and Technology
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| ja |
ウメザワ, ユウ
東京農工大学
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| ja-Kana |
ウメザワ, ユウ
|
Search repository
奥西, 武
由上, 龍嗣
上村, 泰洋
ヨシミズ, チカゲ
| en |
Yoshimizu, Chikage
Research Institute for Humanity and Nature
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| ja |
ヨシミズ, チカゲ
総合地球環境学研究所
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| ja-Kana |
ヨシミズ, チカゲ
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Search repository
タヤス, イチロウ
| en |
Tayasu, Ichiro
Research Institute for Humanity and Nature
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| ja |
タヤス, イチロウ
総合地球環境学研究所
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| ja-Kana |
タヤス, イチロウ
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Search repository
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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 |
Inter-annual variation in the feeding habits and food sources of Japanese sardine and mackerel at age-0 and age-1+ caught in the Kuroshio-Oyashio transition zone of the Western North Pacific were investigated based on analyses of bulk stable isotopes (d13C, d15N) and amino acid nitrogen isotopes (d15NAA). Differences in d13C and d15N between Japanese sardine and mackerel were small for age-0, and interannual variation trends were similar, suggesting they depend on similar food sources in the same food web at this age. In contrast, inter-annual variation in d13C and d15N were significantly different between both species at age-1+, and both d15N of phenylalanine (d15NPhe: an indicator of nitrogen source) and trophic position estimated from d15NAA (TPAA) were higher in mackerel, suggesting that the two species depend on distinct food webs as they age. Inter-annual variations in d15NPhe were considered to have different causes for the two species; differences in food web structure due to the degree of southward intrusion of the Oyashio Current for Japanese sardine, compared to a shift in migration area and depth for mackerel. Furthermore, competition for food due to the recent increases in the population densities of both fishes appeared to be reflected in increased TPAA of mackerel. Although they are caught in the same region, the mechanism of variation in food sources differs because of differences in migration area, depth, and feeding habits. Differences in the feeding habits of Japanese sardine and mackerel may affect trophic status and spawning characteristics, potentially leading to different shifts in stock abundances． |
|
言語 |
en |
| 書誌情報 |
en : Frontiers in Marine Science
巻 10,
p. 1225923,
発行日 2023-11-21
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| 出版者 |
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出版者 |
Frontiers Media |
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言語 |
en |
| 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 |
2296-7745 |
| 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 |
10.3389/fmars.2023.1225923 |
| 権利 |
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言語 |
en |
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権利情報 |
Authors |
| 情報源 |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
Local |
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関連識別子 |
23235011 |
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言語 |
ja |
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関連名称 |
水産資源研究所 水産資源研究センター 海洋環境部 |
| 関連サイト |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
URI |
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関連識別子 |
https://www.frontiersin.org/articles/10.3389/fmars.2023.1225923/full |
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言語 |
en |
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関連名称 |
Frontiers in Marine Science |
| 著者版フラグ |
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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 |
23235011.pdf (2.6 MB)
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