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题名: Age and growth characters of an alien catfish Pelteobagrus fulvidraco in Lake Fuxian, China
作者: Li Xiu-Qi ; Chen Yi-Feng (chenyf@ihb.ac.cn) ; Li Kun
通讯作者: Chen Yi-Feng ; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
刊名: Acta Zoologica Sinica
发表日期: 2006
卷: 52, 期:2, 页:263-271
收录类别: 其他
英文摘要: Pelteobagrus fulvidraco (Richardson) was introduced accidentally to the Lake Fuxian as an alien species a few years ago, and has presented a relative stable output in catches since 2002. Age and growth characters were studied using 708 specimens collected from November 2002 to May 2005. Ages were determined by reading annuli on vertebrae. The estimated age ranges were between 0(+) - 5(+) years for females and 0(+) - 7(+) years for males. The growth parameters used to fit the Von Bertalanffy equation were L-infinity = 294.68 mm, k = 0.2476/y, t(0) = - 0.0298y, W-infinity = 209.93 g for mate and L-infinity = 257.13 mm, k = 0. 2219/y, t(0) = - 0. 3329 year, W-infinity = 184.45 g for female. The growth performance indices were phi(male) g = 4.3324 and phi(female) = 4.1665. The inflexion point of age and body weight was estimated at 3.1 years and 60.98 g for males, correspondingly, 3.6 years and 54.47 g for female. Compared with the data of literature in native regions. These results suggest there were typical characters of a complex age structure and a relatively slow growth in Lake Fuxian population, which would be adaptive responses to increase the total fitness of P. fulvidraco in process of population establishment.
ISSN号: 0001-7302
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/18363
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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Li Xiu-Qi; Chen Yi-Feng (chenyf@ihb.ac.cn) ; Li Kun.Age and growth characters of an alien catfish Pelteobagrus fulvidraco in Lake Fuxian, China,Acta Zoologica Sinica,2006,52(2):263-271
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文件名: Age and growth characters of an alien catfish Pelteobagrus fulvidraco in Lake Fuxian, China.pdf
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