Age and growth of Schizothorax waltoni (Cyprinidae: Schizothoracinae) in the Yarlung Tsangpo river, China
文献类型： 外文期刊
作者： Zhou, Xian-Jun 1 ; Xie, Cong-Xin 1 ; Huo, Bin 1 ; Duan, You-Jian 1 ; Yang, Xin 1 ; Ma, Bao-Shan 3 ;
作者机构： 1.Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Hubei, Peoples R China
2.Guizhou Univ, Coll Anim Sci, Guiyang, Guizhou, Peoples R China
3.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan, Hubei, Peoples R China
关键词： Age; growth; otolith; Schizothorax waltoni; Tibet
期刊名称：JOURNAL OF APPLIED ANIMAL RESEARCH （ 影响因子：1.63； 五年影响因子：1.727 ）
ISSN： 0971-2119
年卷期： 2017 年 45 卷 1 期
页码：
收录情况： SCI
摘要： To better understand the biology of Schizothorax waltoni, the age structure and growth characteristics of S. waltoni were examined. The standard length (SL) range was 41-642 mm and the body weight (BW) range was 1.1-3788.1 g. Otoliths continually grew with increasing SL and increasing age, but asymmetrically over time. One annulus was formed each year, between April and July. Estimated age range was 4-37 yr for males, 4-40 yr for females, and 1-9 yr for those of undetermined sex. The SL-BW relationship was described as BW = 1.365 x 10(-5) SL2.984 for females, BW = 1.238 x 10(-5) SL2.999 for males, and BW = 3.664 x 10(-5) SL2.800 for undetermined specimens. The von Bertalanffy function was used to model the observed length-at-age data as Lt = 644.3 {1 -exp [-0.084(t -0.247)]} for females, and Lt = 586.2 {1 - exp [-0.084(t + 2.250)]} for males. Females grew faster than males. Knowledge of this species' characteristics of slow growth and a long life will be useful for establishing reasonable management practices for its conservation.
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