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https://hdl.handle.net/20.500.14094/90007418
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2024-05-08
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90007418 (fulltext)
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90007418
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タイトル
Anguillid eels as a surrogate species for conservation of freshwater biodiversity in Japan
著者
Itakura, Hikaru ; Wakiya, Ryoshiro ; Gollock, Matthew ; Kaifu, Kenzo
著者名
Itakura, Hikaru
著者名
Wakiya, Ryoshiro
著者名
Gollock, Matthew
著者名
Kaifu, Kenzo
収録物名
Scientific Reports
巻(号)
10(1)
ページ
8790-8790
出版者
Nature Research
刊行日
2020-05-29
公開日
2020-09-04
抄録
To monitor and manage biodiversity, surrogate species (i.e., indicator, umbrella and flagship species) have been proposed where conservation resources are focused on a limited number of focal organisms. Using data obtained from 78 sites across six rivers in the mainland Japan and the Amami-Oshima Island, we demonstrate that two anguillids - the Japanese eel (Anguilla japonica) and the giant mottled eel (A. marmorata) - can act as surrogate species for conservation of freshwater biodiversity. Anguillid eels were the widest topographically-distributed species ranging from near the mouth to the upper reaches of rivers. Moreover, stable isotopic analyses indicated that eels are likely one of the highest-order predators in freshwater ecosystems. A significant positive relationship was found between the density of eels and the number of other diadromous species collected. However, the optimal models revealed that both the density of eels and the number of other diadromous species were significantly negatively correlated with distance from the river mouth and cumulative height of trans-river structures from the river mouth to each site. This suggests the positive relationship between eel density and number of other diadromous species was indirect and related to river-ocean connectivity. Given their catadromous life-cycle, and global commercial and cultural importance, as a taxa, anguillid eels can act as indicator, umbrella and flagship species, and a comprehensive surrogate for conservation of freshwater biodiversity.
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学術雑誌論文
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© The Author(s) 2020.
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
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journal article
言語
English (英語)
eISSN
2045-2322
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DOI
https://doi.org/10.1038/s41598-020-65883-4
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