Changes in abundance of larvae of the four domestic Chinese carps in the middle reach of the Yangtze River, China, before and after closing of the Three Gorges Dam
Changes in abundance of larvae of the four domestic Chinese carps in the middle reach of the Yangtze River, China, before and after closing of the Three Gorges Dam
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DOI：
10.1007/s10641-009-9498-z
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发表时间：
2009-09-01
影响因子：
1.4
通讯作者：
Chen, Daqing
中科院分区：
文献类型：
--
作者：
Duan, Xinbin;Liu, Shaoping;Chen, Daqing
草鱼（Ctenopharyngodon idella）、青鱼（Mylopharyngodon piceus）、鲢鱼（Hypophthalmichthys molitrix）和鳙鱼（Hypophthalmichthys nobilis）这四种中国鲤鱼在长江的流水中产卵。1997年与2005年类似，在长江中游三州市附近对四种中国鲤鱼的幼鱼丰度进行了系统的动态研究。经计算，在每年5月初至6月下旬的繁殖季节，通过三洲河段的鱼苗丰度分别为1997年35.9亿、1998年27.5亿、1999年21.5亿、2000年28.5亿、2001年19.9亿、2002年19.9亿、2003年4.06亿、2004年3.39亿、2005年1.05亿。同时研究了与幼虫丰度动态有关的几个环境参数。长江中上游之间宜昌附近的三峡大坝的建设对鱼类幼虫的丰度产生了明显的影响。
The four domestic Chinese carps, i.e. grass carp (Ctenopharyngodon idella), black carp (Mylopharyngodon piceus), silver carp (Hypophthalmichthys molitrix) and bighead carp (Hypophthalmichthys nobilis), cast their drifting eggs in the running water of the Yangtze River. In 1997 similar to 2005, a systematic study on the dynamics of the abundance the larvae of the four domestic Chinese carps was performed in the middle reach of the Yangtze River, close to Sanzhou city. It was calculated that in breeding seasons from early May to late June every year the abundance of fry drifting through the section of Sanzhou was 3.59 billion in 1997, 2.75 billion in 1998, 2.15 billion in 1999, 2.85 billion in 2000, 1.90 billion in 2001, 1.90 billion in 2002, 406 million in 2003, 339 million in 2004 and 105 million in 2005 respectively. Several environmental parameters related to the dynamics of larval abundance were also examined simultaneously. The construction of the Three Gorges Dam near Yichang between the upper and middle reaches of the Yangtze River has apparently had a drastic influence on the abundance of fish larvae.