| Effect of Water Temperature on Feeding Rhythm in Common Carp （ Cyprinus carpio haematopterus Temminck et Schlegel） |
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| 作者姓名： | Chen Song-bo Chen Wei-xing Fan Zhao-ting |
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| 作者单位： | 1.College of Animal Sciences and Technology, Northeast Agricultural University, Harbin 150030, China;2.College of Animal Sciences and Technology, Northeast Agricultural University, Harbin 150030, China;3.College of Animal Sciences and Technology, Northeast Agricultural University, Harbin 150030, China |
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| 基金项目： | Acknowledgment We thank for the great work of proof reading by Dr. Pingguo He. |
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| 摘 要： | Feeding rhythm of common carp was investigated from 4℃ to 34℃. The results indicated that there was a diel feeding rhythm for both adult （630-850 g） and youth （61-91 g） at all tested temperatures. There were two main activity peaks at 8：00-11：00 a.m. and 19：00-23：00 p.m., during which feeding quantities were 10.68%-32.53% and 16.25%-33.41% of the daily intake, respectively. When water temperature dropped to below 10℃, the feeding peak concentrated at 8：00-11：00 a.m. and 19：00 p.m. to 4：00 a.m. At 6℃, though both adult and youth would still feed, the feeding quantities were only 0.01% and 0.35% of body mass. Daily feeding rate of adult and youth reached 1.21% and 2.63% at 14℃, respectively. Both adult and youth carps reached the maximum daily feeding rate at 28℃, being 2.84% and 12.06% of body mass, respectively. The daily feeding rate of adult and youth reduced suddenly after at 34℃, and the daily feeding rate was only 0.74% and 9.45% of body mass, respectively. There was significant difference in daily feeding rate at different water temperatures （P〈0.05）.
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| 收稿时间： | 2010-07-18 |
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