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Improvement of the survival in the seven-band grouper Epinephelus septemfasciatus larvae by optimizing aeration and water inlet in the mass-scale rearing tank


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タイトル: Improvement of the survival in the seven-band grouper Epinephelus septemfasciatus larvae by optimizing aeration and water inlet in the mass-scale rearing tank
著者: Sakakura, Yoshitaka / Shiotani, Shigeaki / Chuda, Hisashi / Hagiwara, Atsushi
発行日: 2006年 9月
出版者: 日本水産学会 / The Japanese Society of Fisheries Science
引用: Fisheries Science, 72(5), pp.939-947; 2006
抄録: The water flow in larval rearing tanks has been indicated to cause mass mortality of the seven-band grouper Epinephelus septemfasciatus larvae. Therefore, a new aerating method was tested in an actual scale intensive rearing tank (8.0 m in diameter, 1.87 m of water depth, 100 m3 of volume), in which an aerator was positioned at the center of the rearing tank surrounding cylindrical drain (1.2 m in diameter) to generate the flow field, and seven larval rearing trials were performed. The survival rate with the former aeration methods were compared, in which several aerators were located in the rearing tank. The survival rate at 10 days after hatching with the new aeration method (61.5 ± 5.1%, n = 7) was approximately three times higher than the former methods (21.2 ± 13.7%, n = 6). The flow environment of rearing tanks was also examined by quantifying the flow field, and the relationship between the flow field in the rearing tank, behavior of larvae and survival discussed. It was confirmed that the vertical circulating flow was observed in rearing tanks, and determined effectively the survival and the behavior of grouper larvae in patchiness.
キーワード: Behavior / Early mortality / Flow field / Larviculture
URI: http://hdl.handle.net/10069/35838
ISSN: 09199268
DOI: 10.1111/j.1444-2906.2006.01241.x
権利: © 2006 The Japanese Society of Fisheries Science. / The original publication is available at www.springerlink.com
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/10069/35838

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