Journal of Environmental Impact Assessment (환경영향평가)

Korean Society of Environmental Impact Assessment (한국환경영향평가학회)
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Home Range and Daily Activity of Nutria(Myocastorcoypus) Using Radio Tracking in South Korea

원격무선추적을 이용한 한국 정착 뉴트리아(Myocastor coypus)의 행동권 및 활동성 연구

  • Received : 2020.04.13
  • Accepted : 2020.06.09
  • Published : 2020.06.30
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Abstract

This study investigated the home range and characteristics of activities to contribute to the improvement of management techniques and the successful promotion of management policies of invasive nutria, which is a representative invasive species of South Korea. Six individuals were captivated for the study. Remote radio tracking on three of them was carried out followed by the analysis of the results. The average home range of the follow-up individuals were confirmed to be 0.043 ㎢ at MCP 95%, 0.085 ㎢ at K 95%. It was 0.018 ㎢ at K 50%, which is the core space. In 95% MCP, males exhibited the home range with 0.058 ㎢, showed wider home range 0.046 ㎢ than females who showed 0.012 ㎢, and showed a wider home range 0.015 ㎢ more at night than during the day. As a result of comparing the results of this study with the case studies of overseas studies, it is determined that the magnitude of the derived home range is the result of a stable habitat in which the procurement of food resources is smooth and human interference is limited. The daily moved distance of males was larger than that of females, with a maximum moved distance of 1,278 m per day. Activity at the study site is high from around sunset to around 6 A.M., 10 P.M., 7 P.M., 1 A.M., and 5 A.M., and high around sunrise and low during the daytime such as 2 P.M., which reflected the propensity of nocturnal animals to act. The results of this study on the home range and activity in nutria can be used as useful data forimproving the management of invasive alien species for the installation and operation of traps, the spatial setting of controlled areas, and the calculation of the amount ofresources together with a basic understanding of nutria's behaviors in South Korea.

본 연구에서는 뉴트리아를 대상으로 원격무선추적을 이용하여 기초적인 행동권과 활동성을 분석하였다. 밀양시 미전천 하류부 습지에 서식하는 뉴트리아 3개체의 평균 행동권은 MCP 95%에서 0.043㎢, K 95%에서 0.085㎢로 확인되었고, 핵심공간인 K 50%에서는 0.018㎢로 나타났다. MCP 95%에서 수컷은 0.058㎢의 행동권을 나타내어 0.012㎢의 행동권을 나타낸 암컷에 비해 0.046㎢ 넓은 행동권을 보였고, 야간 행동권이 주간 행동권에 비해 0.015㎢ 넓게 나타났다. 일간 평균 이동거리는 수컷이 암컷보다 길었으며, 일일 최대 1,278m의 이동 거리가 확인되었다. 활동성은 오전 06시, 오후 10시, 오후 07시, 오전 01시, 오전 05시에 높게 나타났고, 일몰 전후부터 일출 전후까지 지속적으로 높은 활동성을 보인 반면, 낮 시간대에는 비교적 낮은 활동성을 보여 야행성 동물의 성향이 반영되어 나타났다. 뉴트리아의 행동권과 활동성에 관한 연구는 한국에 정착한 뉴트리아의 생태특성에 관한 이해와 함께 관리 시 포획트랩의 효과적 설치 및 운용 시기의 결정, 관리구역의 공간적 구획, 투입되는 관리자원의 규모 산정 등 침입외생물의 관리 개선 측면에서 유용하게 활용될 수 있다.

Keywords

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