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頁籤選單縮合
題名 | Geographical Variations of Rana Sauteri (Anura: Ranidae) in Taiwan=臺灣產之德氏蛙Rana Sauteri(無尾目:赤蛙科)之地理變異 |
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作者姓名(中文) | 周文豪; 林俊義; | 書刊名 | 動物研究學刊 |
卷期 | 36:3 1997.07[民86.07] |
頁次 | 頁201-221 |
分類號 | 388.691 |
關鍵詞 | 梭德氏蛙; 生物地理; 地理漸變; 蝌蚪; 臺灣; Rana sauteri; Biogeography; Clinal variation; Tadpole; Taiwan; |
語文 | 英文(English) |
中文摘要 | 梭德氏蛙廣泛分佈於臺灣海拔100-3000公尺的山區,生息環境縱跨亞熱帶到涼溫 帶氣候區。蝌蚪是典型的腹吸型(gastromyzophorus type),及上喙外型和唇齒列數呈明顯的地 理漸變(clinal variation),由中西部丘陵向東隨海拔升高到中央山脈臨近地區,並翻越高山到 達臺灣東部,上喙中央缺刻增大,唇齒列有漸增的趨勢,在地理上形成扇狀的變異分佈型。 此一地理變異分佈的形成可由播散說(dispersal)和分衍說(vicariance)來解析。播散說推測中西 部丘陸族群是分佈起源中心(組群acnestral group地區),向東呈扇狀播散,經過渡帶(transition zone),在中央山脈鄰近地區形成另一族群(衍群derived gruop)。成體的型態多變量分析也 顯示類似的地理變異分佈型。這樣的地理變異更能以分衍說來解釋,表示梭德氏蛙已分歧。 |
英文摘要 | Wen-Hao Chou and Jun-Yi Lin (1997) Geographical variations of Rana sauteri (Anura: Ranidae) in Taiwan. Zoological Studies 36(3): 201-221. Rana sauteri is widely distributed in hills and mountains of Taiwan from 100 to 3000 m in elevation, a range including subtropical to cool temperate climatic zones. Both the gastro-myzophorous tadpoles and adults have distinct geographical variations in morphology. Clinal variation in the shpae of the upper jaw sheath and the number of labial tooth rows occurs from the foothills of western Taiwan estward through the Central Mountain Range to the eastern slopes of the Central Mountain Range. This geographical pattern is supported and validated by multivariate analyses of adult morphology. According to the dispersal hypothesis, this geographical pattern may suggest that the dispersal center (=initial range of the ancestral group) was located in the western foothills, and it may indicate that the population expanded radially through the clinally variable transition zone to areas adjcacents to the ridge of the Central Mountain Range (= range of the derived group). However, the establishment of the geographical pattern of R. sauteri seems to be better explained by the vicariance hypothesis which supports the occurrence of isolation-based dichotomous divergence within this grossly defined taxon. |
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