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湖口至南京段长江江豚种群现状评估

于道平,董明利,王江,章贤   

  1. 安徽省铜陵白暨豚养护场,安徽铜陵
  • 出版日期:2006-05-24 发布日期:2008-07-07

POPULATION STATUS OF YANGTZE FINLESS PORPOISE IN THEYANGTZE RIVER SECTION FROM HUKOU TO NANJING

YU Daoping,DONG Mingli,WANG Jiang,ZHANG Xian   

  • Online:2006-05-24 Published:2008-07-07

摘要: 对湖口至南京段长江江豚的考察资料进行分析,结果表明:1. 研究长江江豚不同的生态行为,能提高野外计数的准确性;2. 长江江豚大规模集群(10 头以上)发生在特定的江段,近年来出现的机率在下降;3.湖口至南京段长江江豚数量为1054 头,其中小孤山至湖口段种群密度最高;4.湖口至南京段支流中分布的长江江豚约占该江段种群数量的9.3%。

关键词: 长江江豚, 种群, 密度, 集群行为

Abstract: Analysed on the dates about Yangtze finless porpoise (Neophocaena phocaenoides asiaeorientalis ) observed from the section of Hukou--Nanjing it is showed: 1. Studying on various ecological behavior of Yangtze finless porpoise,precise count of the animal in field can be improved; 2. Recently a large concentration of the animal (over 10 individuals) is obvious decrease which appears in a special section of the Yangtze River; 3. Estimated individuals of Yangtze finless porpoise in the section of Hukou to Nanjing is 1 054, and there is maximum population density in the section of Xiaogushan to Hukou; 4. Individuals of Yangtze finless porpoise in the branch is 9.3% of total population in the section of Nanjing to Hukou.

Key words: Yangtze finless porpoise ( Neophocaena phocaenoides asiaeorientalis), Population, Density, Concentration behavior