Abstract：In order to study the age and growth of
Gymnocypris chui, 268 individual fish were collected from July 2017 and May 2018 in the Lang Tso, Ngamring county, Tibet Autonomous Region. Sample ages ranged from 1 to 23 years old by otolith. The relationship between standard body length (
L) and total body mass (
W) of females and males could be expressed as
W♀=2.03×10
-2L2.822(
n=134,
R2=0.969) and
W♂=2.52×10
-2L2.738(
n=105,
R2=0.966), respectively. The Von Bertalanffy growth equations for standard body length and total body mass of females and males could be expressed as
Lt♀=34.239[1-e
-0.136(t+0.11)],
Wt♀=434.42[1-e
-0.136(t+0.11)]
2.822,
Lt♂=32.201[1-e
-0.136(t+0.287)] and
Wt♂=338.8[1-e
-0.136(t+0.287）]
2.738. The growth inflection point of age for females was 7.52 years, with the standard body length of 22.12 cm and the total body mass of 126.59 g. The growth inflection point of age for males was 7.12 years, with the standard body length of 20.45 cm and the total body mass of 97.71 g. These results suggested that
G. chui has relative slow growth rate and small size, and the destroyed population of which might be difficult to recover from low density. Therefore, the assessment and protection works on
G. chui resources are urgently needed in the Lang Tso.
2019,38(4): 425-432 收稿日期：2018-11-29
分类号：Q959.4;S917.4
基金项目：西藏自治区自然基金项目[XZ2017ZRG-36；XZ2018ZRG-55（Z）]；农业部财政专项“西藏重点水域渔业资源与环境调查”
作者简介：刘飞(1991-),男,实习研究员,从事鱼类生态学研究,E-mail:liufei636@163.com
*通信作者:张驰,副研究员,E-mail:zc0891@163.com
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