Diel feeding rhythms, daily ration, and seasonal changes thereof in marbled flounder Pseudopleuronectes yokohamae

Journal of Applied Ichthyology 34 巻 4 号 888-895 頁 2018-07-25 発行
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タイトル ( eng )
Diel feeding rhythms, daily ration, and seasonal changes thereof in marbled flounder Pseudopleuronectes yokohamae
作成者
Takahashi Satoshi
Kurita Yutaka
Togashi Hiroyuki
収録物名
Journal of Applied Ichthyology
34
4
開始ページ 888
終了ページ 895
抄録
This paper aims to assess the diel feeding pattern and seasonal variation in the daily ration of immature and mature marbled flounder (Pseudopleuronectes yokohamae ). A day‐night collection by bottom trawls was conducted in Sendai Bay in July 2014. Marbled flounder (131–493 mm total length; Number of collected individuals = 1830, Number of analyzed individuals = 497) fed mainly on polychaetes during the day. At night, stomach content weight decreased with time, but the weight and proportion of bivalve siphons were consistently higher at night than during the day, suggesting nocturnal feeding by the flounder on bivalve siphons. Daily ration was greater in females (<300 mm: 2.6%–3.2% body weight; ≥300 mm: 1.5%–2.5%) than in males (<300 mm: 1.7%–2.6%; ≥300 mm: 1.3%–1.9%). Seasonal surveys were also carried out, and the greater ration in females than males were consistent throughout the year, suggesting that greater growth in females than males attributes to the greater food intake of females. The ration was highest in June, especially for large individuals, although water temperature in June was lower than that in September. These results indicate that the amount of food intake is related to the annual life cycle of the marbled flounder.
内容記述
This work was partly supported by the Stock Assessment Program of Fisheries Agency and Fisheries Research and Education Agency of Japan and the program “Project on Clarifying the Impact of Nuclear Substances” of the Fisheries Agency of Japan.
言語
英語
資源タイプ 学術雑誌論文
出版者
Wiley
発行日 2018-07-25
権利情報
© 2018 Blackwell Verlag GmbH
This is the peer reviewed version of the following article: Takahashi S, Kurita Y, Togashi H, Tomiyama T. Diel feeding rhythms, daily ration, and seasonal changes thereof in marbled flounder Pseudopleuronectes yokohamae. J Appl Ichthyol. 2018;34:888–895., which has been published in final form at https://doi.org/10.1111/jai.13719. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。
出版タイプ Author’s Original(十分な品質であるとして、著者から正式な査読に提出される版)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0175-8659
[ISSN] 1439-0426
[DOI] 10.1111/jai.13719
[DOI] https://doi.org/10.1111/jai.13719