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題 名 | 臺中市東海大學校園內錢鼠生殖生態之研究=Reproductive Ecology of the House Shrew (Suncus Murinus)in the Campus of Tunghai University, Taichung, Taiwan |
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作 者 | 林良恭; 張鈞翔; | 書刊名 | 東海學報 |
卷 期 | 37:2(理學院) 民85.07 |
頁 次 | 頁151-162 |
分類號 | 389.62 |
關鍵詞 | 錢鼠; 性二分化; 生殖特性; 族群密度; Suncus murinus; Sexual dimorphism; Reproductive characters; Population density; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究於臺中市東海大學校園內,自1988年9月起至1989年9月止,針對錢鼠 (Suncus murinus)進行生殖生態研究,共獲132隻雄性,82隻雌性,性別比為1.62:1,有顯 著性差異。在教職員宿舍之捕獲量大過於牧場和相思林區。其密度高達27.7隻/公頃,後二 者分別為9.7隻/公頃及8.6隻/公頃。全年之族群變動並無明顯的季節變化。雄性的平均體 重及體長為53.1±14.5g及216.4±25.5mm,皆大於雌性,後者的平均體重及體長為 34.6±8.3g 及196.2±18.1mm,為明顯的性二分化。 從組織切片的資料來看,未成熟雄性在副睪內無精子存在,且其兩只睪丸重小於75mg 。雄性全年皆可生殖,在5月、7-10月及1月之生殖活力可達100%。雌性亦全年可發現懷 孕個體,最輕者之體重為25g,以此為雌性達性成熟之體重判定,則冬季(11月-2月),成 體雌性的懷孕率最低。平均胚胎數為3.2±1.3隻,範圍1-6隻。比較亞洲各地區錢鼠之生 殖狀況,臺灣地區錢鼠之生殖特徵與大陸浙江及日本琉球相近似。 |
英文摘要 | A survey of the reproductive ecology of Suncus murinus was conducted in the campus of Tunghai University, Taichung, Taiwan. The sex ratio of the captured shrews was significantly different from 1:1 (132 males and 82 females). More shrews were caught in the Teachers' dormitory areas (27.7/ha in density) that the farm (9.7/ha) and the Acacia woodland (9.6/ha), however, no an apparent seasonal fluctuation was found. The shrews showed a sexual dimorphism with the male being larger. The mean body weights of males and females were 53.1±14.5g and 34.6±8.3g and the mean total body length were 216.4±25.5 mm and 196.2±18.1 mm, respectively. Histological evidences indicated that immature males had no sperm in epididymis and their testes weighed below 75 mg, though the reproductive males could be found all the year round, the greater intensity of breeding activity occurred in May, July-October and January. Sexual maturity in females, judged by discernible pregnancy, occurred as early as 25 g in body weight. The pregnant females were found all the year round, however, the lower pregnant rates occurred in winter (November-January). Embryo sizes averaged 3.2±1.3 (range: 1-6). Comparison from other Asian countries indicated that the reproductive characters of Suncus murinus in Taiwan were similar to the shrews of the Zhejiang, China and Okinawa, Japan. |
本系統中英文摘要資訊取自各篇刊載內容。