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鄱阳湖及其支流长江江豚种群数量及分布

肖文 张先锋   

  1. 中国科学院水生生物研究所
  • 出版日期:2005-07-12 发布日期:2008-07-07

DISTRIBUTION AND POPULATION SIZE OF YANGTZE FINLESS PORPOISE IN POYANGLAKE AND ITS BRANCHES

XIAO Wen ZHANG Xianfeng   

  • Online:2005-07-12 Published:2008-07-07

摘要: 在1997 年11 月至1998 年11 月的134 d 中, 大致按一年四季, 分4 次对鄱阳湖及其主要支流中的长江江豚种群数量、数量的季节变动、分布、行为、江豚栖息地环境、人类活动对江豚的影响进行了考察。江豚的分布主要集中在鄱阳湖湖区, 赣江、信江、抚河等主要支流的中下游和支流入湖的湖口附近。冬、春、秋3 个季节鄱阳湖水系长江江豚种群数量的估计值分别为91 头、431 头和260头。即, 鄱阳湖江豚的种群数量约为100~400 头,其种群数量随季节、水位、鱼类资源的变化而呈现出相应的变化。

关键词: 长江江豚, 鄱阳湖, 分布, 种群数量

Abstract: Four surveys , roughly representing four seasons of the year , were taken from November 1997 through November 1998 with totally about 120 days1 Population size of Yangtze finless porpoise , Neophocaena phocaenoides asiaeorientalis , and its seasonal changing , distribution , behavior , habitat , impacts by human activities , etc. , have been studied in Poyang Lake and its main branches in this study. Main distribution areas were in the open lake , and lower reaches of its main branches , such as Ganjiang River , Xinjiang River , Fuhe River , etc. , and their estuaries. Estimated population sizes of the porpoise in the lake , including its main branches , were 91 in winter , 431 in spring , and 260 in autumn respectively during the year. Namely , its population size was estimated roughly between 100 and 400. The population dynamic varied in different seasons , water levels , and fish resources.

Key words: Finless porpoise ( Neophocaena phocaenoides asiaeorientalis), Poyang Lake, Population size, Distribu2