국제적 멸종위기종인 산양 암컷(n=6)의 출산시기 행동권 분석을 위해 2007년 3월부터 2014년 5월까지 설악산국립공 원, 월악산국립공원 2지역에서 GPS collar 발신기를 이용하여 연구 수행하였다. 분석결과 출산시기에 따라 행동권의 변화를 확인하였다. MCP 95%에서 봄 1.00±1.00km2 > 가을 0.66±0.30km2 > 여름 0.61±0.40km2 > 겨울 0.50±0.10km2 (F=4.240, p<0.05)로 분석되었으며, 월별분석은 5, 6, 7월에 급격이 행동권이 작아지는 특징을 보였으며, 통계적으로 유의적인 차이를 보였다(F=24.261, p<0.01). 이렇듯 행동권의 급격한 변화를 보인개체들은 새끼를 출산한 개체로 확인 되었고, 행동권이 급격히 작아지는 것을 확인 할 수 있었다. 평균 이용고도는 615.77±173.508m이며 출산개체와 비출산 개체 모두 큰 차이는 없었다. 이러한 분석을 통하여 출산 시기 등을 고려한 개체관리 및 복원에 적용할 수 있을 것으로 판단된다.

In this study, we hypothesized that the size of wintering crane population would change due to the climate factors. We assumed that wintering population size would differ by climate values in January, which is the coldest period in year. Especially, White-naped cranes were able to choose wintering site between Cheorwon and other alternative place where snow coverage had low influence, differing from Red crowned cranes. For this reason, we predicted the population size of White-naped cranes would fluctuate according to the extent of snow coverage in Cheorwon. Therefore we used snow coverage data based on MODIS and climate data from KMA (Korea Meteorological Administration) that are generally used. We analyzed the crane’s population size in Cheorwon in January from 2002 to 2014. The temperature in the Cheorwon increased from 2002 to wintering period in 2007~ 2008 and went down, showing the lowest temperature in 2011~ 2012. With this phenomenon, warmth index showed the similar pattern with temperature. Amount of newly accumulated snow (the amount of snow that fallen from 0:01 am to 11:29 pm in a day) was low after 2002, but rapidly increased in 2010~ 2011 and 2011~ 2012. The area of snow coverage rapidly declined from 2002 to 2005~ 2006 but suddenly expanded in wintering period in 2009~ 2010 and 2010~ 2011. Wintering population size of the White-naped cranes decreased as snow coverage area increased in January and the highest correlation was found between them, compared to the other climatic factors. However, the number of individuals of Red crowned cranes had little relationship with general climate factors including snow cover range. Therefore it seems that population size of the Red crowned crane varied by factors related with habitat selection such as secure roosting site and area of foraging place, not by climatic factors. In multiple regression analysis, wintering population of White-naped cranes showed significant relationship with logarithmic value of snow cover range and its period. Therefore, it suggests that the population size of the White-naped crane was affected by snow cover range n wintering period and this was because it was hard for them to find out rice grains which are their main food items, buried in snow cover. The population size variation in White-naped cranes was caused by some individuals which left Cheorwon for Izumi where snow cover had little influence on them. The wintering population in Izumi and Cheorwon had negative correlation, implying they were mutually related.