西藏哲古错高原裸鲤年龄结构与生长特性

对西藏哲古错高原裸鲤（）的年龄结构与生长特性进行研究。2017—2019年，在西藏哲古错共采集高原裸鲤样本432尾，采用微耳石鉴定年龄，测量耳石半径，进行体长退算，研究其年龄结构与生长特性。结果显示，所采集高原裸鲤样本体长范围为3.1~35.6 cm，体重范围为0.4~645.9 g；年龄范围为1~11龄，6~8龄鱼比例超过35%。体长（2=0.9911，>0.05），拟合建立von Bertalanffy生长方程，=1114.2331-e^{-0.149（=27.826 cm、为4.399。综上，哲古错高原裸鲤年龄结构简单化，处于增长期，可能是受哲古错特殊的地理位置和生态生境等因素影响。本研究旨在为西藏脆弱的生态系统中该物种的保护提供基础数据，并建议通过入湖河流水量管理、限制捕捞等人类活动等措施，改善哲古错生态环境，对哲古错高原裸鲤种群进行保护。}

Age structure and growth characteristics of Gymnocypris waddelli in the Zhegu Lake, Tibet

is one of the most important endemic fish species in the Zhegu Lake of Tibet. The age structure and growth characteristics of were investigated by examining 432 samples collected in Zhegu Lake from 2017 to 2019. The body length (), otolith radius, and age were measured to describe the relationships between body length, body weight, and age. The results showed that the body length of ranged 3.1-35.6 cm and that body weight ranged from 0.4 to 645.9 g. Estimated age was between 1 and 11 years, and most individuals were 6 to 8 years of age (accounting for about 35% of the total samples). The relationship between body weight and body length was described by the linear equation, =432), which is consistent with uniform growth characteristics. There was no significant difference in the relationship between body length, body weight, and age between males and females ( was described by the von Bertalanffy equation as t=1114.2331-e^{-0.149(. The inflection age of the growth curve occurred at 8.263 years at a body length of 27.826 cm and weight of 333.811 g. The apparent growth index was 4.399. The age structure of in Zhegu Lake is simplified and the population is in the growing period, which may be affected by the special geographical location and ecological habitat of Zhegu Lake. The purpose of this study was to provide basic data for the protection of this species in Tibet''s fragile ecosystem. This study proposes to suggest measures to control water management in the river entering the lake and limit human activities such as fishing and tourism, so as to improve the ecological environment of Zhegu Lake and protect the population of .}