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Effects of flow velocity on growth of juvenile cobia

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Title: Effects of flow velocity on growth of juvenile cobia
Authors: Yu, Shyi_Liang
Ueng, Ping-Sheng
Keywords: cage aquaculture, cobia, flow velocity, growth, Rachycentron canadum
LC Subject Headings: Fish culture--Israel--Periodicals.
Fish culture--Periodicals.
Issue Date: 2005
Publisher: Israeli Journal of Aquaculture - BAMIGDEH
Citation: Yu, S., & Ueng, P. (2005). Effects of flow velocity on growth of juvenile cobia. The Israeli Journal of Aquaculture - Bamidgeh, 57(4), 241-249.
Series/Report no.: The Israeli Journal of Aquaculture - Bamidgeh
Abstract: The objective of this study was to investigate the growth rate and feed conversion ratio (FCR) of juvenile cobia, Rachycentron canadum, in different flow velocities. In experiment A, fifteen groups of fish with an initial mean weight of 14.35 g were reared for 28 days in one of five flow velocities: 0, 5, 10, 15, and 20 cm/s. In experiment B, fifteen groups of fish with an initial mean weight of 30 g were reared for 21 days in the same velocities as in experiment A. In experiment C, fish weighing an average 77 g were raised for 21 days in 0, 10, 20, 30, and 40 cm/s. The opti- mal velocities in terms of growth rate were 10 cm/s for fish of 10-30 g (experiment A), 20 cm/s for fish of 30-60 g (experiment B), and 23 cm/s for fish of 60-200 g (experiment C); the optimal velocity increased as the fish weight increased. FCR and specific growth rate (SGR) also signif- icantly (p<0.05) corresponded to the flow velocity for the different sized juveniles with the opti- mal FCR and weight gains occurring at 10-23 cm/s. FCR rapidly increased when the velocity exceeded 35 cm/s, regarded as the maximum flow velocity for fish growth.
Pages/Duration: 9 pages
ISSN: 0792-156X
Appears in Collections:IJA Volume 57, Issue 4, 2005

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