台灣地區青斑蝶族群變動與移動行為之探討

Abstract

本研究以標識再捕法分析台灣地區青斑蝶族群的組成與周年動向，並就陽明山大屯山區的青斑蝶再捕獲資料進行族群數量估算。2000-2008年間，大屯山區青斑蝶族群數量最低為418隻，最高為165322隻，年度間數量變化差異極大。就長時間的連續變化而言，此區族群的數量變動可能以3-4年為一週期。就異地再捕獲的長距離移動與各地區的出現時間紀錄，青斑蝶有季節性、固定方向的移動行為，但短距離的移動則似無方向規律。冬季時無群聚越冬現象，雌蝶亦無生理滯育，於多處地區可觀察到成蝶活動與幼蟲的世代紀錄，其越冬方式可能為多策略並行。

Chestnut tiger butterfly（Parantica sita niphonica Moore）population dynamic was studied by using mark-release-recapture method of Yangmingshan national park, Datun mountain. The results from 2000 to 2008 indicated that the estimated chestnut tiger butterfly population size ranged from 418 to 165322. Thus the population size of the butterfly varied diffentially year by year. However, there seems to be a tendency for the population size of chestnut tiger butterfly to undergo a 3-4 year cycle. According to the records of recapture in different sites, distances and areas, chestnut tiger butterfly may have seasonal and directional movement. The short distance movements, on the other hand, had no specific orientation. The chestnut tiger butterfly may employ various strategy to overwinter. The chestnut tiger butterfly did not gather in the winter, and all stages of larvae and adult could be found in many areas.