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Individual variations in fatty acid composition and concentration as indicators of the nutritional condition of wild pointhead flounder larvae

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/59449

Title: Individual variations in fatty acid composition and concentration as indicators of the nutritional condition of wild pointhead flounder larvae
Authors: Hiraoka, Yuko Browse this author
Takatsu, Tetsuya Browse this author →KAKEN DB
Ando, Yasuhiro Browse this author →KAKEN DB
Issue Date: Jul-2014
Publisher: Springer
Journal Title: Marine Biology
Volume: 161
Issue: 7
Start Page: 1615
End Page: 1625
Publisher DOI: 10.1007/s00227-014-2445-3
Abstract: We investigated the fatty acid compositions and concentrations of wild marine fish larvae with a highly accurate method because our knowledge of them has been seriously limited compared with cultured larvae. This study presents estimates of the fatty-acid-based nutritional condition of individual larvae in the field. Because the pointhead flounder Cleisthenes pinetorum displays relatively high stock size fluctuations, we investigated the developmental change in the fatty acid compositions of the body trunk, head, and eye and the annual fluctuations in the fatty acid concentrations in the trunk. We show that the process of fatty acid accumulation is not uniform across body parts and that the trunk is a better indicator of larval nutritional status than other parts because there is less time lag. Starved larvae with simultaneously high docosahexaenomic acid ratios and low total fatty acid concentrations, as observed in laboratory experiments, are rare in the wild. Thus, starved larvae must be removed rapidly by predators before they can experience a relatively long period of starvation in the wild. Fatty acid accumulation was greater in the larvae of the 2005 year class than in those of the 2006 year class in their first feeding stage, according to the optimal model derived with generalized linear model. A previous study indicated that the 2005 year class showed stronger recruitment than the 2006 year class. We conclude that the fatty acid analysis of wild larvae is a useful index of their nutritional status and mortality, especially in the first feeding stage.
Rights: The original publication is available at www.springerlink.com
Type: article (author version)
URI: http://hdl.handle.net/2115/59449
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高津 哲也

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