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Study on the hatch date and growth of juvenile grass carp from middle reaches of the Yangtze River using daily increment technology
Guan Xing-Hua; Cao Wen-Xuan; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2007
Source PublicationActa Hydrobiologica Sinica
ISSN1000-3207
Volume31Issue:1Pages:18-23
AbstractGrass carp ( Ctenopharyngodon idellas) is an important commercial fish species with great catches in China. Main stem of the Yangtze River is main reproduction ground of grass carp. Grass carp spends much of its time feeding in lakes where food is abundant and water is quiet. During spring, when the water levels rise, the adult fish migrate into the rivers to spawn. In June 2003 1 Three Gorges Reservoir began water storage and the water level reached 135 meters, then up to 139 meters in November. It is worthy to be studied that whether the water storage will affect the hydrological conditions and sequently spawning time of grass carp in the middle reaches of the Yangtze River.The daily ages (D) of juvenile grass carps collected from the Dongting Lake and Xintankou section of the Yangtze River in July and August 2004 were determined by observing the daily increment,and the hatch dates were estimated. The body length (BL,mm) growth equation of all samples was RL = - 53.4195 + 3.1650D,the weight (W,g) growth equation was W = 0.9816 e(0.0633D) and the relationship between body length and body weight was W = 0.00001BL(3.1003).Estimated hatch dates primarily distributed between mid-May and early July. The earliest hatch date was 14-May, which was a little later than the records before the water storage of Three Gorges Reservoir. It was thought that the hydrological conditions on the middle reaches of the Yangtze River might be changed after the water storage and then had affected on the hatch date of grass carp,which should be proved in the further study.
Indexed By其他
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/18299
Collection期刊论文
Corresponding AuthorGuan Xing-Hua; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Guan Xing-Hua,Cao Wen-Xuan,Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China. Study on the hatch date and growth of juvenile grass carp from middle reaches of the Yangtze River using daily increment technology[J]. Acta Hydrobiologica Sinica,2007,31(1):18-23.
APA Guan Xing-Hua,Cao Wen-Xuan,&Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China.(2007).Study on the hatch date and growth of juvenile grass carp from middle reaches of the Yangtze River using daily increment technology.Acta Hydrobiologica Sinica,31(1),18-23.
MLA Guan Xing-Hua,et al."Study on the hatch date and growth of juvenile grass carp from middle reaches of the Yangtze River using daily increment technology".Acta Hydrobiologica Sinica 31.1(2007):18-23.
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