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クメ マナブ
Manabu Kume
久米 学 所属 石巻専修大学 理工学部 職種 准教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2023/08/26 |
| 形態種別 | 研究論文（学術雑誌） |
| 査読 | 査読あり |
| 標題 | Striped catfish (Pangasianodon hypophthalmus) exploit food sources across anaerobic decomposition- and primary photosynthetic production-based food chains |
| 執筆形態 | 未選択 |
| 掲載誌名 | Scientific Reports |
| 出版社・発行元 | Springer Science and Business Media LLC |
| 巻・号・頁 | 13(1),pp.13992 |
| 著者・共著者 | Ayano Medo,Nobuhito Ohte,Hiroki Kajitani,Takashi Nose,Yuki Manabe,Tatsuya Sugawara,Yuji Onishi,Akiko S. Goto,Keisuke Koba,Nobuaki Arai,Yasushi Mitsunaga,Manabu Kume,Hideaki Nishizawa,Daichi Kojima,Ayako Yokoyama,Toshiro Yamanaka,Thavee Viputhanumas,Hiromichi Mitamura |
| 概要 | Abstract
Dietary information from aquatic organisms is instrumental in predicting biological interactions and understanding ecosystem functionality. In freshwater habitats, generalist fish species can access a diverse array of food sources from multiple food chains. These may include primary photosynthetic production and detritus derived from both oxic and anoxic decomposition. However, the exploitation of anoxic decomposition products by fish remains insufficiently explored. This study examines feeding habits of striped catfish (Pangasianodon hypophthalmus) at both adult and juvenile stages within a tropical reservoir, using stable carbon, nitrogen, and sulfur isotope ratios (δ13C, δ15N, and δ34S, respectively) and fatty acid (FA) analyses. The adult catfish exhibited higher δ15N values compared to primary consumers that feed on primary photosynthetic producers, which suggests ingestion of food sources originating from primary photosynthetic production-based food chains. On the other hand, juvenile catfish demonstrated lower δ15N values than primary consumers, correlating with low δ34S value and large proportions of bacterial FA but contained small proportions of polyunsaturated FA. This implies that juveniles utilize food sources from both anoxic decomposition and primary photosynthetic production-based food chains. Our results indicate that food chains based on anoxic decomposition can indeed contribute to the dietary sources of tropical fish species. |
| DOI | 10.1038/s41598-023-41209-y |
| ISSN | /2045-2322 |
| PermalinkURL | https://www.nature.com/articles/s41598-023-41209-y.pdf |
| researchmap用URL | https://www.nature.com/articles/s41598-023-41209-y |