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Euryhaline rotifer Proales similis as initial live food for rearing fish with small mouth


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タイトル: Euryhaline rotifer Proales similis as initial live food for rearing fish with small mouth
著者: Hagiwara, Atsushi / Wullur, Stenly / Marcial, Helen S. / Hirai, Narisato / Sakakura, Yoshitaka
発行日: 2014年 8月20日
出版者: Elsevier
引用: Aquaculture, 432, pp.470-474; 2014
抄録: The SS-type rotifer Brachionus rotundiformis is a common initial food for rearing fish larvae with a small mouth. However, there are commercially important fish species whose mouth sizes are too small to feed on SS-type rotifers. In 2004, we isolated a small (body length=82.7±10.9μm; body width 40.5±6.4μm), flexible, and iloricate rotifer, Proales similis from an estuary in Okinawa, Japan. Under laboratory conditions (25°C, 2-25ppt) P. similis produced its first offspring on 2.5 to 2.8days after hatching, and produced 4.3 to 7.8 offspring within 4.0 to 4.7days life span. Batch cultured P. similis fed Nannochloropsis oculata suspension at 28.8μg dry weight ml-1 and cultured at 25°C, 25ppt filtered seawater, increased exponentially from 25 to 2400ind ml-1 after 11days of culture with an overall intrinsic rate of natural increase (r) of 0.42day-1. The growth rate of P. similis was not significantly different when fed fresh N. oculata and super fresh Chlorella vulgaris-V12®. Total lipid per wet weight of P. similis fed by N. oculata and C. vulgaris were 2.4 and 2.6%, respectively. The compositions of eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), and arachidonic acid (ARA) of P. similis fed N. oculata were 23.2, 0.0 and 5.3%, respectively, while these were 11.0, 17.5 and 0.5% respectively, when fed C. vulgaris. The use of P. similis to feed small mouth fish including seven-band grouper Epinephelus septemfasciatus, rusty angelfish Centropyge ferrugata, and humphead wrasse Cheilinus undulatus showed that it is an excellent starter food for these species because of their high selectivity index and improved survival. In addition, P. similis was ingested by Japanese eel Anguilla japonica larvae with a complicated digestive system. The use of P. similis as starter feed for small mouth fish larvae is highly recommended.
キーワード: Euryhaline rotifer / Larval rearing / Live food / Proales / Small-mouth fish
URI: http://hdl.handle.net/10069/34901
ISSN: 00448486
DOI: 10.1016/j.aquaculture.2014.03.034
権利: © 2014 Elsevier B.V. / NOTICE: this is the author’s version of a work that was accepted for publication in Aquaculture. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Aquaculture, 432, (2014)
資料タイプ: Journal Article
原稿種類: author
出現コレクション:080 学術雑誌論文

引用URI : http://hdl.handle.net/10069/34901

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