Study on the population density and activity rhythm of wild boar in Longyou County,Zhejiang,China
[Objective]By investigating the population density and activity rhythm of wild boar(Sus scrofa)in Longyou County of Zhejiang Province,this study is aimed to research the accurate countermeasures for wild boar prevention and control,and to provide exemplary monitoring and evaluation work from theory and practice to methodological application at the county level.[Method]Firstly,with the employment of infrared camera technology,a total of 1 308 independent and valid photographs were obtained from January 2021 to August 2023.Then the population density was estimated using a random encounter model,and the activity rhythm of the wild boar in the studied area was also investigated using the kernel density estimation method.[Result]The population density of wild boar in Longyou County ranged from 0.957 to 1.291 per square kilometer,with the total estimated population size of 417 to 563.The number of wild boar decreased from the southern mountainous areas,the northern mountainous areas to the central regions.In terms of habitat selection,the wild boar population preferred coniferous forests(relative abundance index IRA=38.45％),mixed coniferous and broad-leaved forests(IRA=24.39％),and the elevation range of 1 100 to 1 300 m(IRA=57.25％).High population density was observed at 17:00 in all four seasons.The daily activity rhythms were similar in spring and winter,exhibiting an unimodal pattern.When come to summer,the daily activity rhythm was bimodal,with the main peaks occurring around sunrise and sunset.There was no significant fluctuation of daily activity rhythm in autumn and the population exhibited a highly significant seasonal migration along the altitudinal gradient(P＜0.01).[Conclusion]The distribution of wild boars in Longyou County exhibits significant spatial heterogeneity,and their activity rhythms are deeply influenced by the factors of altitude and season.This study provides direct scientific evidence for the formulation of wild boar control policies in Longyou County and will serve as a reference for estimating population density as well as studying the activity rhythms of wild boar at the county level.[Ch,2 fig.4 tab.29 ref.]
infrared trigger camerarhythm of activitywild boar(Sus scrofa)population densityaltitude gradient
万方数据
维普
