Sex ratio and age structure of wild boars (<i>Sus scrofa</i>) culled by leg snare trap in the Yamizo mountainous region of Tochigi Prefecture, Japan

DOI
  • Endo Tomohiko
    United Graduate School of Agricultural Science Tokyo University of Agriculture and Technology
  • Kodera Yuuji
    Center for Weed and Wildlife Management, Utsunomiya University

Bibliographic Information

Other Title
  • 栃木県八溝山地域における足くくりわなで捕獲されたイノシシ（<i>Sus scrofa</i>）の性比および齢構成

Abstract

<p>The wild boar (Sus scrofa) is one of the most widely captured animals in Japan, and the population culled using leg snare traps has been increasing in recent years. However, the characteristics of wild boars captured using this method remain unclear. This study was conducted to determine the sex ratio and age structure of the wild boars captured in the Yamizo mountainous region of Tochigi Prefecture for many years by examining the wild boars brought to a slaughterhouse in Nakagawa town. The male-to-female ratio was 1.37:1. To determine the age structure, the number of animals, including both males and females, in the 0-year-old group was low. In contrast, 83.9% of males were <2 years old, whereas 37.2% of females were ≥2 years old. Additionally, the age at which the probability of capture, calculated from this sample, was the highest, and was estimated to be 1.4 years for males and 2.1 years for females. As female wild boars attain sexual maturity and start breeding in less than one year of age, continuous capture of subadult or older female boars using leg snare traps is effective in controlling the population of wild boars.</p>

Journal

Keywords

Details 詳細情報について

  • CRID
    1390291115021520896
  • NII Article ID
    130008158666
  • DOI
    10.11238/mammalianscience.62.39
  • ISSN
    1881526X
    0385437X
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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