鄱阳湖长江江豚同步监测及种群动态分析
Simultaneous monitoring and population dynamics analysis of Yangtze finless porpoise in Poyang Lake
投稿时间:2022-07-14  修订日期:2024-07-01
DOI:
中文关键词:长江江豚、鄱阳湖、同步监测、种群动态、Distance软件
英文关键词:Yangtze finless porpoise  Poyang Lake  Simultaneous monitoring  Population dynamics  Distance software
基金项目:全球环境基金(GEF)江西省湿地保护区体系示范项目(GCP/CPR/052/GEF)、江西省农牧渔业科研指导性课题“鄱阳湖长江江豚种群生存力分析”(JXNMY202051)、江西省农牧渔业科研指导性课题“扬子洲水域长江江豚生态系统健康状况评价”(JXNMY202246)
作者单位E-mail
王伟萍* 江西省水生生物保护救助中心 wangweiping916@163.com 
摘要点击次数: 52
全文下载次数: 8
中文摘要:
      为支撑鄱阳湖长江江豚保护方案制定,及时准确掌握鄱阳湖长江江豚种群动态,2019年11月-2021年11月开展了4次同步监测,并采用 Distance 7.4 软件估算了其种群数量和密度。研究结果表明,总有效航程为1846 km,累计在429个位点观测到长江江豚,累计观测到长江江豚1001头次,母子豚130对次。2021年11月在139个位点观测378头个体,2019年11月仅在123个位点观测到225头。两年间鄱阳湖长江江豚观测个体数量增长了68%,观测位点数量增长了13.0%,估算的种群密度也增长49.2%。鄱阳湖长江江豚在集群规模方面,1-2头个体组成群体的频次最大,占比60.43%-90.24%,年际间差别较大,占比逐年下降;5头(含)以上群体,占比4.88%-12.20%,占比逐年上升,均与水位关系不明显。鄱阳湖长江江豚平均遇见率为 0.418-0.804头/ km,不同水位差别较大,低水位遇见率高,2021年11月长江江豚以及母子豚遇见率和幼豚所占比例均最高,说明长江江豚种群数量、幼体和可育雌性群体在种群中所占比例均呈现稳中有增趋势,表明鄱阳湖长江江豚种群可能已经实现了正增长。
英文摘要:
      In order to support the development of a conservation plan and to master the population dynamics of the Yangtze finless porpoise in Poyang Lake, four simultaneous monitoring were carried out from November 2019 to November 2021, and the distance 7.4 software was used to estimate the population number and density. The research results showed that the total effective voyage was 1,846 kilometers, and the Yangtze finless porpoise had been observed at 429 sites in total, with a total of 1,001 Yangtze finless porpoises and 130 pairs of mother and child dolphins. In November 2021, 378 individuals were observed at 139 sites, while only 225 individuals were observed at 123 sites in November 2019. In the two years, the number of individuals observed for the Yangtze finless porpoise in Poyang Lake increased by 68%, and the number of observation sites increased by 13.0%, and the estimated population density also increased by 49.2%. In terms of cluster size of the Yangtze finless porpoise in Poyang Lake, the frequency of clusters consisting of 1-2 heads was the largest, accounting for 60.43%-90.24%, and the difference between years was large, and the proportion was decreasing year by year; The proportion of clusters consisting of more than 5 heads (inclusive) accounted for 4.88%-12.20%, and the proportion increased year by year, and the relationship between them was not obvious with the water level. The average encounter rate of Yangtze finless porpoises in Poyang Lake was 0.418-0.804 individuals/km, but there were large differences in different water levels, and the encounter rate was high at low water levels. The population size of the Yangtze finless porpoise and the proportion of mother and child dolphins in the population showed a steady and increasing trend, indicating that the population of the Yangtze finless porpoise in Poyang Lake might have achieved positive growth.
王伟萍.2024.鄱阳湖长江江豚同步监测及种群动态分析[J].水生态学杂志,45(4):134-140.
查看全文  查看/发表评论  下载PDF阅读器   HTML
Copyright © 2008 《水生态学杂志》编辑部 地址:湖北省武汉市雄楚大街578号 
邮编:430079 电话:027-82926630 E-mail: sstx@mail.ihe.ac.cn  京ICP备09084417号