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Food habits of the farmer damselfish Stegastes nigricans inferred by stomach content, stable isotope, and fatty acid composition analyses
http://hdl.handle.net/10069/25477
http://hdl.handle.net/10069/25477595d2aec-34e1-46e2-9ae5-e8cb44451e5a
名前 / ファイル | ライセンス | アクション |
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EcoRes26_809.pdf (478.7 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2011-08-08 | |||||
タイトル | ||||||
タイトル | Food habits of the farmer damselfish Stegastes nigricans inferred by stomach content, stable isotope, and fatty acid composition analyses | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Coral reef | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Fatty acid composition | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Herbivory | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Stable isotope analysis | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Stomach contents | |||||
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 |
Hata, Hiroki
× Hata, Hiroki× Umezawa, Yu |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The territorial damselfish, Stegastes nigricans, maintains algal farms by excluding invading herbivores and weeding unpalatable algae from its territories. In Okinawa, Japan, S. nigricans farms are exclusively dominated by Polysiphonia sp., a highly digestible filamentous rhodophyte. This study was aimed at determining the diet of S. nigricans in Okinawa and its dependency on these almost-monoculture algal farms based on stomach content and chemical analyses. Stomach content analyses revealed that all available food items in the algal farms (i. e., algae, benthic animal inhabitants, trapped detritus) were contained in fish stomachs, but amorphous organic matter accounted for 68% of the contents. Therefore, carbon and nitrogen stable isotope ratios and fatty acid (FA) compositions were analyzed to trace items actually assimilated in their bodies. Stable isotope analyses showed that benthic animals were an important food source even for this farmer fish. Two essential fatty acids (EFAs), 20:4n6 and 20:5n3, which are produced only by rhodophytes among available food items, were rich in the muscle tissue of S. nigricans as well as in algal mats and detritus, suggesting that algal mats contribute EFAs to S. nigricans directly and indirectly through the food web. In conclusion, S. nigricans ingested algal mats, detritus, and benthic animals maintained within its farm. Algae and detritus were original sources of EFAs, and benthic animals, which were much more abundant in the farms than in outside territories, provided a nitrogen-rich dietary source for the fish. | |||||
書誌情報 |
Ecological Research 巻 26, 号 4, p. 809-818, 発行日 2011-07 |
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出版者 | ||||||
出版者 | Springer | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 09123814 | |||||
EISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 14401703 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10667816 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1007/s11284-011-0840-5 | |||||
権利 | ||||||
権利情報 | © The Ecological Society of Japan 2011 | |||||
権利 | ||||||
権利情報 | The original publication is available at www.springerlink.com | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Ecological Research, 26(4), pp.809-818; 2011 |