RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2006, Vol. 15 >> Issue (4): 442-446.

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PRIMARY STUDY ON EFFECT OF SPRINGFISHINGBAN SEASON ON FISHERY COMMUNITY STRUCTURE AND BIODIVERSITY IN CHANGSHU SECTION OF THE YANGTZE RIVER

ZHANG Min-ying, LIU Kai, XU Dong-po, SHI Wei-gang   

  • Received:2005-07-20 Revised:2005-10-20 Online:2006-07-20
  • Contact: SHI Wei-gang

Abstract: Based on fisheries dynamic monitoring data during April~June from 2000 to 2004, the paper analyzed the effect of springfishingban season on fishery community structure and species biodiversity in Changshu section of the Yangtze River. The results showed that fishes of 11 orders, 18 families, and 46 species were represented in Changshu section of the Yangtze river. After the season, the total catch per unit effort (CPUE) increased sharply in the section; the dominant species were mainly commercial fishes such as Coilia ectenes, Mugil cephalus and Parabramis pekinensis and the annual change of dominant species was not obvious. The CPUE of Coilia ectenes had risen up and the trend of resource deterioration had been kept within limits. The caught rate of pintsized and juvenile fish rose markedly. The Margalef's index and Wilhm's index had an evident tendency of rising, while McNaughton's index and Pielou's index waved slightly. The ecological effect of springfishingban season on the protection of fishery resources has been obvious: the interspecific structure of fishery resources has improved to some degree and the biodiversity ascended after fishingban season.

Key words: springfishingban season, fishery community structure, biodiversity, Changshu section of the Yangtze River

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