Journal
ENVIRONMENTAL BIOLOGY OF FISHES
Volume 86, Issue 1, Pages 13-22Publisher
SPRINGER
DOI: 10.1007/s10641-009-9498-z
Keywords
Fish larvae; Asian carps; Dynamic analysis; Three Gorges Dam; Yangtze River
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Funding
- National Science Foundation of China [30490234, 30371105]
- Three Gorges Project Company
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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.
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