湖泊科学Issue(5)：917-924,8.DOI:10.18307/2015.0519
珠江干流长洲水利枢纽蓄水后珠江鳡鱼（Elopichthys bambusa）早期资源现状∗
Status of Elopichthys bambusa recruitment stock after the impoundment of Changzhou Hydro-junction in Pearl River
摘要
Abstract
Changzhou Hydro-junction was the most downstream dam in the main stream of Pearl River. Its impoundment would change the characteristics of the hydrological environment of the downstream, and may effect the function of Elopichthys bambusa spawning grounds. In order to understand the influence, E. bambusa recruitment stocks were surveyed by quantify drifting net at Zhaoqing after the impoundment of Changzhou Hydro-junction in the Pearl River from 2008 to 2013. The results showed that E. bambusa larvae usually occurred from mid-April to early August, and peaked from May to July. The annual mean duration was 97 ± 21 days. E. bambusa recruitment stock was accounted for 0. 46% ± 0. 21% in the total larvae fishes. The occurrence of E. bambusa larvae showed obviously seasonal patterns. There were 3 5 times of the peaks every year following the flood, and there was significant correlation between the peak times of larvae fish and the flood. E. bambusa recruitment stock was about 1. 689 ± 0. 916 billion, and the breeding population was estimated about 52. 8 t. The result indicates that the E. bambusa larvae population had decreased after Changzhou dam operation, but prohibition of fishing in the Pearl River has slowed down the deca-ying. Suggestions for fish protection after the impoundment of Changzhou Hydro-junction are given.关键词
鳡/鱼苗/早期补充群体/长洲水利枢纽/珠江Key words
Elopichthys bambusa/larvae fish/recruitment/Changzhou Hydro-junction/Pearl River引用本文复制引用
李跃飞,李新辉,杨计平,李捷,帅方敏..珠江干流长洲水利枢纽蓄水后珠江鳡鱼（Elopichthys bambusa）早期资源现状∗[J].湖泊科学,2015,(5):917-924,8.基金项目
中国水产科学研究院基本科研业务费项目(2013A0103)、公益性行业(农业)科研专项经费项目(201303048)和广西省自然科学基金重大项目(2013GXNSFEA053003)联合资助 （2013A0103）
