Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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The Relationship between the Time of Breeding Migration of the Gori Salamander (Hynobius yangi) and Climate Factors

고리도롱뇽의 번식이주 시기와 기후요소와의 관계

  • Kim, Ja-Kyoung (Department of Biology, Kangwon National University) ;
  • Park, Daesik (Division of Science Education, Kangwon National University) ;
  • Lee, Heon-Ju (Department of Biology, Kangwon National University) ;
  • Jeong, Soo-Min (Department of Biology, Kangwon National University) ;
  • Kim, Il-Hun (Department of Biology, Kangwon National University)
  • Received : 2014.08.11
  • Accepted : 2014.09.06
  • Published : 2014.09.30
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Abstract

To elucidate which climate factors and what periods affect the time of breeding migration of Gori salamanders (Hynobius yangi), we have investigated relationships between the 5-years breeding monitoring data from 2006 to 2010 which had obtained in both natural and translocated breeding sites at Bongdae mountain, Gijang-gun, Busan-si and the matched climate data obtained from the weather station, approximately 25 km apart from the sites. Mean average and mean lowest temperatures during one month before the first breeding migration were related with the time of first female migration in the translocated site. Mean temperature variation and mean precipitation during 60~120 days before the first breeding migration affected the time of 30% male appearance at the natural site and the time of 30% female appearance at both natural and translocated sites. Climate factors were more closely related with female appearance than male and at the translocated site than at the natural site. Our results show that changes in mean temperature variation and mean precipitation rather than mean average temperature might more significantly affect the breeding migration of salamanders, female breeding migration is more closely related with climate factors, and the salamanders translocated could be more affected by climate changes than those in natural populations.

번식 시작 전 어느 기간의 어떠한 기후요소가 고리도롱뇽의 번식이주 시기에 영향을 미치는 지를 파악하고자, 부산시 기장군 봉대산 일대에서 고리도롱뇽의 자연번식지와 인접한 대체번식지에서 2006년부터 2010년까지 5년의 번식기 동안 날짜에 따라 번식지에 출현한 개체들을 기록한 개체군 모니터링 자료와 조사지로부터 약 25 km 떨어진 기상대에서 획득한 기후정보 사이의 상관관계를 분석하였다. 연구결과, 번식 시작 전 약 1달 동안의 평균기온 및 평균최저기온은 대체번식지 내 암컷의 번식이주 시기에 영향을 미쳤으며, 번식 전 2~4달 동안의 겨울철 평균일교차와 평균강수량은 각각 자연번식지의 수컷과 자연번식지와 대체번식지의 암컷의 번식이주 시기에 영향을 미쳤다. 번식이주 시기와 기후 요소와의 관련성은 수컷보다 암컷에서, 자연번식지에서보다는 대체번식지에서 더 높았다. 이러한 연구결과는 년도에 걸친 단순한 평균온도의 상승보다는 겨울철을 포함하는 기간 동안의 평균강수량과 평균일교차의 변동이 유미양서류 번식이주 시기에 더 큰 영향을 미치는 것을 보여준다. 더불어 암컷의 번식이주 시기가 수컷에 비하여 기후요소에 보다 더 밀접하게 관련되며, 특별히 이주된 유미양서류의 개체군들에서 이주시기는 기후요소의 영향을 더 크게 받는다는 것을 보여준다.

Keywords

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