|Table of Contents|

The Population Dynamics of the Yangtze Finless Porpoise in Nanjing Between 2019 to 2023(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2024年02期
Page:
54-62
Research Field:
江豚生态学与保护生物学
Publishing date:

Info

Title:
The Population Dynamics of the Yangtze Finless Porpoise in Nanjing Between 2019 to 2023
Author(s):
Chen Bingyao1; Jiang Xinyue1; Liu Shan2; Zhang Jun2; Hao Xiuqing1; Zhu Lin1; Li Ting1; Chen Liwen1
(1.School of Life Sciences,Nanjing Normal University,Nanjing 210023,China)
(2.Nanjing Yangtze Finless Porpoise Provincial Nature Reserve Management Station,Nanjing 210019,China)
Keywords:
Yangtze Finless Porpoise; distribution pattern; Nanjing reserve; home range; population size
PACS:
Q958.8
DOI:
10.3969/j.issn.1001-4616.2024.02.007
Abstract:
Nanjing is one of the most densely distributed water area for Yangtze River Finless Porpoises in the main stream of the Yangtze River,which has been widely concerned,but its population dynamics are still unclear. The study has continuously monitored the Yangtze River Finless Porpoise in the waters of the Nanjing Yangtze River Finless Porpoise Provincial Nature Reserve between 2019 and 2023 by conducting a continuous field vessel survey. This article analyzed the dynamic changes in the distribution,home range,and population size of the Yangtze River Finless Porpoise in Nanjing. Through 112 ds of field vessel survey,274 Finless Porpoises were found,mainly in Qianzhou,Jiangxin Island,Sanqiao and Zihuizhou Xinjizhou Waters. The distribution of pufferfish was arranged in an aggregated pattern,as shown by the average nearest neighbor tool test. The minimum convex polygon,95% core density KDE,and 50% KDE family areas for KDE were 50.86 km2,135.54 km2,and 60.81 km2,respectively,12 km2 and 60.81 km2 respectively. The Finless Porpoise population size of the Yangtze River varies with time and season. From 2019 to 2023,the average population size of the Yangtze River Finless Porpoise in the Nanjing section was about 52,60,57,62,and 65,respectively,with spring and winter being higher than autumn and summer. Compared to the past,the increase in population size may be related to measures such as the “Yangtze River Protection”,the “10-year Fishing Ban”,and the Yangtze River Finless Porpoise rescue action plan.

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Last Update: 2024-06-15