Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Reproductive Dynamics of the Gold-spotted Pond Frog (Rana plancyi chosenica) Population Located at Cheongwon, Korea

청원군에 소재한 금개구리(Rana plancyi chosenica) 개체군의 번식동태

  • Sung, Ha-Cheol (Department of Biology Education, Korea National University of Education) ;
  • Ra, Nam-Yong (Department of Biology, Kangwon National University) ;
  • Cheong, Seok-Wan (Department of Biology Education, Korea National University of Education) ;
  • Kim, Soo-Kyeong (Department of Biology Education, Korea National University of Education) ;
  • Cha, Sang-Min (Department of Biology Education, Korea National University of Education) ;
  • Park, Dae-Sik (Division of Science Education, Kangwon National University)
  • 성하철 (한국교원대학교 생물교육과) ;
  • 라남용 (강원대학교 생물학과) ;
  • 정석환 (한국교원대학교 생물교육과) ;
  • 김수경 (한국교원대학교 생물교육과) ;
  • 차상민 (한국교원대학교 생물교육과) ;
  • 박대식 (강원대학교 과학교육학부)
  • Published : 2009.02.28
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Abstract

To study reproductive dynamics of a Gold-spotted pond frog (Rana chosenica) population located at Gangnae, Cheongwon, Chungbuk, Korea, we monitored the population over 207 days between April 17$^{th}$ 2007 and December 18$^{th}$ 2008 using a drift fence accompanied with 20 pitfall traps. The population was located in an agricultural wetland, compromising three small ponds. Gold-spotted pond frogs immigrated into the wetland between April 16$^{th}$ and June 17$^{th}$ and emigrated from the wetland between September 21$^{st}$ and November 12$^{th}$. Precipitation showed a positive correlation with the number of migrated frogs in Autumn 2007 and Spring 2008, but other environmental factors such as air and water temperatures and relative humidity did not show any significant relationships. In general, small frogs first migrated into and from the wetland, but the trend was not strong. Female gold-spotted pond frogs were bigger than males. During the autumn migration, small frogs of which snout-vent length was smaller than 20 mm were found, indicating that successful breeding occurred in the population. Our results could be useful to conserve this endangered species in Korea.

환경부지정 멸종위기 II급 종인 금개구리 (Rana plancyi chosenica)의 번식생태를 연구하기 위하여 충북 청원군 장내면에 위치하는 묵논형 습지에 있는 금개구리 개체군을 2007년 4월부터 2008년 11월까지 총 207일에 걸쳐서, 모음담장과 주머니함정을 설치하여 모니터링을 실시하였다. 금개구리들은 봄철 4월 20일부터 6월 13일 사이에 번식지로 이동하였으며, 가을철 동면지 이동은 9월 21일부터 11월 16일 사이에 일어났다. 서식지 내 외로의 이동은 2007년과 가을 이동과 2008년 봄 이동 시 공히 강수와 높은 양의 상관을 보였지만, 기온, 수온, 상대 습도와는 유의미한 상관관계를 보이지 않았다. 금개구리들은 이동 시 주로 논의 언덕이나 묵논과 연결된 이동경로를 다른 경로보다 선호하여 사용하는 것으로 나타났다. 번식지 내 외로의 이동순서와 개체의 신체 요소와는 2007년 봄에는 번식지 내 외로의 이동순서와 개체의 몸길이(snout-vent length)와 양의 상관을 보였으며, 이동순서와 몸무게와는 2008년 봄을 제외한 모든 경우에 양의 상관을 보여, 작은 개체들이 먼저 출현하고 먼저 동면지로 이주하는 경향을 보였다. 금개구리 암컷은 수컷에 비하여 유의미하게 큰 것으로 확인되었으며, 가을철 동면지 이주 시 20mm SVL 크기 이하의 작은 개체들의 수가 2007년, 2008년 공히 소폭 증가하여, 개체군 내에 성공적인 번식이 일어나고 있음을 알 수 있었다. 이러한 연구결과는 금개구리 야외 개체군을 보존하는 기초자료로 활용할 수 있을 것이다.

Keywords

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