龙开口集运鱼系统集鱼效果研究

Study on the fish gathering effect of Longkaikou fish gathering and transportation system

摘要

为了解龙开口集运鱼系统的集鱼效果，通过集运鱼系统的定期运行，对8种目标鱼类进行捕捞过鱼。结果表明，集鱼系统对裂腹鱼的集鱼效果较好，但与2021年集鱼系统监测结果差别较大。说明在相同时节，受到周围环境不同影响，集鱼系统对同一鱼类的集鱼效果不同。随后以短须裂腹鱼(Schizothorax wangchiachii)、细鳞裂腹鱼(Schizothorax chongi(Fang))、齐口裂腹鱼(Schizothorax prenanti)为主要研究对象，进行PIT试验，研究在集鱼系统不同部位放流后的集鱼效果。结果表明，试验期间在集鱼斗内放流后回捕到该区域放流的标记鱼17尾，进入到集鱼平台中13尾，逃出集鱼平台比例为23.08%。在集鱼平台入口放流的标记鱼进入集鱼斗8尾，留在集鱼平台中9尾，逃出集鱼平台比例为45.16%。深水网箔入口处放流的标记鱼监测到5尾进入集鱼平台中，上溯率为16.67%。研究结果表明龙开口集运鱼系统具有一定的集鱼效果。该研究可为龙开口集运鱼系统的改造及国内集运鱼系统集鱼效果研究提供参考。

Abstract

In order to understand the fish gathering effect of Longkoukou fish gathering and transportation system, eight target fish species were caught through regular operation of the fish gathering and transportation system. The results showed that the fish aggregating system had a good effect on aggregating schizothorax, but it was quite different from the monitoring result of the fish aggregating system in 2021. This indicated that in the same season, due to different influences of the surrounding environment, the fish aggregating system will have different effects on the same fish. The PIT experiment was conducted with Schizothorax wangchiachii, Schizothorax chongi(Fang) and Schizothorax prenanti as the main research objects, to study the effect of collecting fish after releasing in different parts of the collecting system. The results showed that during the experiment, 17 tagged fish were caught in the collecting hopper, 13 of them entered the collecting platform, and 23.08% escaped from the collecting platform. 8 tagged fish released at the entrance of the fish collecting platform entered the fish collecting tank, 9 fish stayed in the fish collecting platform, and the proportion of fish escaping from the fish collecting platform was 45.16%. Five tagged fish released at the foil entrance of the deep water net were detected to enter the fish collecting platform, and the uplink rate was 16.67%. The result show that the Longkou fish collecting system has a certain effect of collecting fish. The research can provide reference for the transformation of Longkou fish collecting system and the research on the effect of domestic fish collecting system.

关键词

集鱼平台 / 集鱼效果 / PIT标记

Key words

fish collecting platform / fish collection effect / PIT tagging

Author summay

沈智敏(1995—), 男, 助理工程师, 硕士, 主要从事水利水电工程管理。E-mail: [e-mail]