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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/26633

Title: Effect of Temperature on Sex Differentiation and Growth of Tilapia Oreochromis mossambicus Fry
Authors: Sha-Yen Cheng;Hastings K. Zidana;Jiann-Chu Chen
Contributors: NTOU:Department of Aquaculture
Keywords: male sex ratio;O. mossambicus;sex differentiation;weight gain
Date: 2008-05
Issue Date: 2011-10-21T02:18:06Z
Publisher: Journal of International Cooperation
Abstract: Abstract:Male sex ratio and growth rate of Java tilapia Oreochromis mossambicus fry were investigated in this study. Fry at day post hatching (DPH)of 5,10,20 and 30 days were exposed to 32,35 and 38°C for different exposure times(ET)of 5,10,20, and 30 days. The male sex ratio and groeth increased significantly with exposure time for the 10-DPH fry. The male sex ratios were 91.0%,82.3% and 71.0% for the 10-DPH and 30-ET fry exposed to 38,35 ans 32°C, respectively. The critical labile period for sex differentiation is 50-DPH to 10-DPH with 30 ET at 32,35 and 38°C. A regression was found between male sex ratio and temperature(t), DPH(D), exposure time (T), interaction variable(Dt) between DPH and temperature, and interaction variable(DT) between DPH and exposure time, which is: Male sex ratio(%)=8.791+1.053t+0.455D-2.220T-0.007Dt+0.090DT,R2=0.915
Relation: 3(1), pp.1-14
URI: http://ntour.ntou.edu.tw/handle/987654321/26633
Appears in Collections:[水產養殖學系] 期刊論文
[環境生物與漁業科學學系] 期刊論文

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