Change in Egg Size and Clutch Size of Varied Tit (Parus varius) with Elevation in Mt. Jirisan

지리산 지역에서 곤줄박이의 고도별 알 크기와 한배산란수의 변화

  • Lee, Jong-Koo (Department of Forest Sciences, Seoul National University) ;
  • Chung, Ok-Sik (Department of Forest Sciences, Seoul National University) ;
  • Lee, Woo-Shin (Department of Forest Sciences, Seoul National University) ;
  • Park, Jong-Young (South Experimental Forest, Seoul National University) ;
  • Kang, Sang-Ho (South Experimental Forest, Seoul National University) ;
  • Ha, Gi-Ho (South Experimental Forest, Seoul National University) ;
  • Park, Chang-Gwon (South Experimental Forest, Seoul National University)
  • 이종구 (서울대학교 산림과학부) ;
  • 정옥식 (서울대학교 산림과학부) ;
  • 이우신 (서울대학교 산림과학부) ;
  • 박종영 (서울대학교 남부 학술팀) ;
  • 강상호 (서울대학교 남부 학술팀) ;
  • 하기호 (서울대학교 남부 학술팀) ;
  • 박창권 (서울대학교 남부 학술팀)
  • Received : 2006.12.28
  • Accepted : 2007.03.12
  • Published : 2007.03.31

Abstract

This study was conducted to clarify the differences in egg-laying characters of Varied tit (Parus varius) as elevation in the Mt. Jirisan. We set up 144 artificial nest-boxes at three sites located in 300, 900, 1400m in elevation and checked egg size, clutch size and first date of egg-laying. At a result, There was no difference in egg size as elevation. But clutch size at high elevation was lower than at low elevation. Also, first date of egg-laying at high elevation was later than at other sites. In this research, we think that difference of clutch size at three sites result from 'individual adjustment hypothesis' and difference of first date of egg-laying have relation to sprouting date of leaves and distribution of insects.

본 연구는 고도에 따른 곤줄박이(Parus varius)의 산란생태의 차이를 파악하기 위해 지리산 지역에서 수행하였다. 고도가 다른 세 지역(약 300, 900, 1500m)에 인공새집을 설치한 후 알의 크기, 한배산란수, 첫 산란일을 조사하였다. 조사 결과 알의 크기는 고도에 따른 차이를 보이지 않았지만, 한배산란수는 고도가 높아짐에 따라 작게 나타났다. 또한 첫 산란일도 차이를 보이는 것으로 나타났다. 본 연구에서 나타난 한배산란수의 차이는 '개체 적응 가설'에 의한 결과로 판단하고 있다. 그리고 첫 산란일에 차이는 잎의 개엽 시기, 곤충의 분포형태와 밀접한 관련이 있는 것으로 판단된다.

Keywords

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