长江流域资源与环境 >> 2013, Vol. 22 >> Issue (11): 1305-.

• 自然资源 • 上一篇    下一篇

长江上游长薄鳅生长和种群参数的估算

田辉伍 | 段辛斌 | 熊 星 | 罗宏伟 | 刘绍平| 陈大庆   

  1. (1西南大学生命科学学院 淡水鱼类资源与生殖发育教育部重点实验室|重庆 400715;2中国水产科学研究院长江水产研究所|湖北 武汉 430223;3重庆师范大学生命科学学院 重庆市动物生物学重点实验室|重庆 400047
  • 出版日期:2013-10-20

ESTIMATION OF GROWTH AND POPULATION PARAMETERS OF ELONGATE LOACH (LEPTOBOTIA ELONGATA) IN THE UPPER REACHES OF THE YANGTZE RIVER

TIAN Huiwu1|2| DUAN Xinbin2| XIONG Xing2|3| LUO Hongwei1|2| LIU Shaoping2| CHEN Daqing2   

  1. (1Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education)| School of Life Science| Southwest University| [JP]
    Chongqing 400715| China|2Yangtze River Fisheries Research Institute| Chinese Academy of Fishery Sciences| Wuhan 430223| China;3Key Laboratory of Animal Biology in Chongqing City| School of Life Science| Chongqing Normal University| Chongqing 400047| China
  • Online:2013-10-20

摘要:

2010年9月~2012年8月在长江上游攀枝花等9个采样点收集到长薄鳅(Leptobotia elongata Bleeker)样本1 528尾,基于体长频率数据采用世界粮农组织(FAO)开发的FiSAT II软件研究了长江上游长薄鳅的生长与种群参数。估算结果显示长薄鳅的极限体长(L∞)为6561 mm,生长系数(k)为015/a,理论生长起点年龄(t0)为-0048 a。采用Pauly的经验公式估算长薄鳅的自然死亡系数(M)为033(其中长江上游年平均水温为184℃),总死亡系数(Z)、捕捞死亡系数(F)和开发率(E)分别为085、053和062。2010~2011年长江上游长薄鳅年均资源重量和资源数量分别为1321 t和162 862尾,最大可持续产量(MSY)为517 t。经相关估算参数和相对单位补充渔获量分析得出,当前长江上游长薄鳅已处于过度捕捞状态,有必要采取有效保护措施

Abstract:

Growth and population dynamics of elongate loach (Leptobotia elongata Bleeker) were investigated by using FiSAT II software of FAO on length based data, 1528 specimens of elongate loach were collected from Panzhihua,Yongshan,Shuifu,Juexi,Nanxi,Neijiang,Chishui,Jiangjin,Chengjiang and Wanzhou in the upper reaches of the Yangtze River between September 2010 and August 2012The relationship between the body length(mm) and body weight(g) was expressed as W=1×10-5L3024The growth parameters estimated by length frequency analysis were:〖JP〗asymptotic length (L∞=65610 mm), growth constant (k=015 year-1) and age at length 0 (t0=-0048 year-1) The natural mortality (M) of elongate loach was 033 year-1 by using Paulys M empirical equation, where the mean habitat temperature was 184 ℃ The total mortality (Z) was 085 year-1 and the fishing mortality (F) was 053 year-1 The exploitation rate (E) was found to be 062 During 2010-2011, the average stock of elongate loach from the upper reaches of the Yangtze River was 1321 tonnes, with a number of 162 862 individuals The MSY was estimated to be 517 t for elongate loach The analysis of related parameters and relative yieldperrecruit suggest that elongate loach in the upper reaches of the Yangtze River is overexploited Corresponding conservative fishery strategies should be carried out to protect the elongate loach in the upper reaches of the Yangtze River

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