臺灣博碩士論文加值系統

梭德氏赤蛙（Rana sauteri）分布於台灣海拔100至3,000 m鄰近溪流棲地，其生活史特徵隨海拔的不同而有所變異。其高海拔族群主要於春季進行繁殖，低海拔族群則於秋冬期間進行繁殖，然而有關其族群與年齡結構在不同海拔族群間是否有所差異，仍無相關研究來加以探討。因此本研究自2005年3月至2006年3月，於阿里山地區300至2,300 m的海拔區域內設置七個不同海拔的調查樣地，利用捕捉標放法與趾骨鑑齡來探討梭德氏赤蛙不同海拔的族群結構、壽命長短、成長曲線、年齡和體型之變異。結果發現隨著海拔的降低，梭德氏赤蛙的繁殖族群數量越大且低海拔族群雄蛙的體型顯著大於高海拔族群，並具有較高的成長速率，而雌蛙的體型則無顯著差異。於年齡結構上，高海拔族群具有較大的年齡組成，其最大壽命、平均年齡皆比低海拔族群要大，但各樣地的雌雄蛙間則無年齡上的差異。梭德氏赤蛙的雌雄蛙體型具二型性，雌性體型大於雄性，但年齡上沒有差異，可能是雌性比雄性具有較高的成長速率所造成。另外，低海拔族群的繁殖季長，雄蛙在繁殖前期比後期具有較大的體型，而雄蛙在繁殖前後期的年齡組成，則無顯著差異。

Sauter’s frog, Rana sauteri Boulenger, 1909 in Taiwan during the elevations from 300 to 3,000 m showed obvious altitudinal clines in reproductive and life cycle traits. The populations in high elevation bred in spring and the populations in low elevation bred in autumn and winter. But the studies about the differences in population and age structures of Rana sauteri between different elevations are poor. Therefore, we sited seven survey sites of different elevations between 300 and 2,300 m in elevation in Ali Mountain area. The wild surveys were performed from March 2005 to March 2006. Mark-recapture and skeletochronology were used to understand the variation in the population structure, longevity, growth curve, age, and size of Rana sauteri. The results showed that the increase in elevation, the population sizes of Rana sauteri were larger in low elevation than those in high elevation. Body sizes of male were larger in low elevation than those in high elevation but not so significant in female. In the age structure, the populations in high elevation had longer longevity and larger mean age than those in low elevation. But there was no significance in the ages of male and female in the same survey sites. Rana sauteri is dimorphism. The mean of body sizes of female was bigger than that of male, but the mean of age had no difference between both. It may result from the mean of female’s growth speed was higher than that of male. The populations in low elevation had long period of breeding time, the mean of body size of male frog in earlier period was bigger than that in later period, but there was not obvious no significance in age.

致謝……………………………………………………………………Ⅰ
中文摘要………………………………………………………………Ⅱ
英文摘要………………………………………………………………Ⅲ
目錄……………………………………………………………………Ⅳ
表目錄…………………………………………………………………Ⅴ
圖目錄…………………………………………………………………Ⅵ
前言……………………………………………………………………1
材料與方法……………………………………………………………6
結果……………………………………………………………………15
討論……………………………………………………………………25
結論……………………………………………………………………31
參考文獻………………………………………………………………32
表………………………………………………………………………37
圖………………………………………………………………………46

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