基于标志回捕的赤水河河源段昆明裂腹鱼资源量评估  

Assessment of the resources of Schizothorax grahami in the headwaters of Chishui River based on the marking and recapture

作　　者：成芸 赵晓莎 唐永忠 张友钊 CHENG Yun;ZHAO Xiaosha;TANG Yongzhong;ZHANG Youzhao(Zhaoyang District Water Bureau,Zhaotong 657000,China;Yunnan Administration and Conservation Bureau of Rare and Endemic Fish National Nature Reserve in the Upper Reaches of the Yangtze River,Zhaotong 657000,China)

机构地区：[1]昭阳区水务局,云南昭通657000 [2]长江上游珍稀特有鱼类国家级自然保护区云南管护局,云南昭通657000

出　　处：《渔业研究》2023年第5期473-479,共7页Journal of Fisheries Research

基　　金：昭通水保办〔2017〕新建铁路(成贵线)乐山至贵阳段对长江上游珍稀特有鱼类国家级自然保护(云南段)生态补偿项目——增殖放流效果评价。

摘　　要：本文采用荧光标记、背鳍T标、剪鳍标记3种标记放流方法,对昆明裂腹鱼实施标记放流,结合放流河段跟踪调查结果,对赤水河河源段昆明裂腹鱼资源量进行评估。本次标记放流时间为2016年4月,标记放流数量共计11000尾,放流地点为赤水河河源段。标记群体跟踪调查时间为2016年5月、6月和7月,共调查取样三次。调查结果表明,剪鳍标记及背鳍T标均存在散失的问题,其中背鳍T标的脱标率随着暂养时间的延长呈指数性上升。在调查评估赤水河河源段期间,昆明裂腹鱼瞬时资源数量分别为1.99×10^(4)、2.12×10^(4)、1.68×10^(4)尾;瞬时生物量分别为467.6、726.1、909.3 kg。评估结果表明,昆明裂腹鱼增殖放流效果显著。实施鱼类增殖放流有利于赤水河河源段自然保护区内鱼类资源的稳定增长、繁殖保护和可持续利用。In order to understand the status of fishery resources after the implementation of conservation management and stocking of the Chishui River,and to provide a data base for future fish conservation and stocking work,this study was conducted in 2016 by using three methods of fluorescent tagging,dorsal fin T-tagging,and fin clipping tagging to mark and recapture S.grahami as an indicator species,and using breeding experiments to deduce the marker loss rate.Three samples were taken in May,June and July to assess the fish resources in the source section of the Chishui River.The results showed that the instantaneous resource numbers of S.grahami in the source section of the Chishui River during the assessment period were 1.99×10^(4),2.12×10^(4)and 1.68×10^(4)individuals,respectively;the instantaneous biomass was 467.6 kg,726.1 kg and 909.3 kg,respectively.Both the clipped fin marker group and the dorsal fin T marker group suffered from fall off and loss,with the loss rate of the dorsal fin T marker increasing exponentially with the increase of breeding time.The evaluation results showed that the continuous proliferation and release had a significant effect on the stability of fish resources in the headwaters of Chishui River and was conducive to the recovery of fish resources.

关 键 词：标志回捕 昆明裂腹鱼 资源量评估 赤水河 

分 类 号：S93[农业科学—渔业资源]