月旦知識庫
 
  1. 熱門:
 
首頁 臺灣期刊   法律   公行政治   醫事相關   財經   社會學   教育   其他 大陸期刊   核心   重要期刊 DOI文章
特有生物研究 本站僅提供期刊文獻檢索。
  【月旦知識庫】是否收錄該篇全文,敬請【登入】查詢為準。
最新【購點活動】


篇名
圈飼台灣黑熊之繁殖性狀
並列篇名
Reproduction Behavior and Characters of the Formosan Black Bear in Captivity
作者 楊吉宗毛嘉洪詹芳澤 (F.-T. Chan)何東輯
中文摘要
本試驗利用二雄二雌圈飼之台灣黑熊(Ursus thibetanus formosanus Swinhoe)觀察其發情、交配、攝食、體重、生產前後的狀況及行為,並檢測類固醇性荷爾蒙的變化以探討其繁殖性狀。雌熊1號與雄熊1號在2000年交配後並未懷孕,但交配後雌熊之攝食量及體重均增加,另以酵素免疫分析法(enzyme immunoassay,EIA)檢測其糞孕酮(fecal progesterone)發現於交配後約5個月明顯上昇;雌熊2號與雄熊2號在2001年交配後懷孕生產,交配後雌熊之攝食量與體重亦均增加,其糞孕酮亦於交配後約6個月明顯上昇;雌熊1號與雄熊2號在2001年亦曾合欄飼養但未有交配行為,雌熊之攝食、體重、糞孕酮則無明顯變化。由有交配行為才會引起攝食、體重及糞孕酮的變化,認為台灣黑熊屬誘發排卵(induced ovulation),且交配後會有假懷孕(pseudopregnancy)現象。交配懷孕者在5-6個月之後糞孕酮才上昇,在此5-6個月期間,推測是胚胎停滯發育而延遲著床(delayed implantation),著床同時糞孕酮昇高,並於著床後約2個月後生產,總懷孕期7個月半。假懷孕與真懷孕的糞孕酮濃度均會明顯變化,故認為糞孕酮無法單獨作為診斷懷孕與否的依據。懷孕雌熊的外表特徵在產前一個月攝食量劇減、行動較緩慢、反應較遲鈍、多蜷縮於窩巢、舔自身乳房及產前一週完全拒食。產後約20多天不吃、不喝、不排糞、不排尿,與冬眠熊隻的生理性狀相似,以自身儲存的能量轉換為乳汁育幼。 Two male and two female Formosan black bears (Ursus thibetanus formosanus Swinhoe) incaptivity were paired to study their reproductive behavior and characters from April 2000 to March 2002.After being paired, three reproductive conditions of the females were obtained. They were a pregnant female, a pseudopregnant female, and an unmated female. For both pregnant and pseudopregnantfemales, the food intake and body weight increased after mating, and its fecal progesterone contentsrapidly elevated five to six months later. Also, the blood progesterone contents of the pregnant femalechanged with the fecal progesterone contents. For the unmated female there was no change in foodintake, body weight and fecal progesterone content. The increases in food intake and body weight forboth pregnant and pseudopregnant females suggested that ovulation of the female Taiwan black bear wasinduced by act of copulation, the so-called induced ovulation. The occurrence of rapid elevation of theprogesterone contents 5-6 months later after mating suggested that there was a delayed embryoimplantation. The gestation period was seven and half months. The parturition occurred two months afterthe elevation of progesterone. The pregnant female decreased food intake a month prior to theparturition, and was in fasting condition without intake of food, urination and defecation for about a weekprior to and three weeks after the parturition. Because the elevation of fecal progesterone occurred inboth pregnant and pseudopregnant females, a measurement of fecal progesterone content is useless fordiagnosis of the pregnancy. About a month long fasting of the female Formosan black bear, which doesnot hibernate in the subtropical region in this study is fairly similar to the case reported for black bearswhich hibernate in the cold climatic region.
起訖頁 1-13
關鍵詞 台灣黑熊繁殖行為假懷孕延遲著床糞孕酮Ursus thibetanus formosanusreproductive behaviorpseudopregnancydelayed implantationfecal progesterone
刊名 特有生物研究  
期數 200301 (5:1期)
出版單位 農委會特有生物研究保育中心
該期刊-下一篇 台灣長鬃山羊族群具有顯著遺傳變異之兩個分群
 

新書閱讀



最新影音


優惠活動




讀者服務專線:+886-2-23756688 傳真:+886-2-23318496
地址:臺北市館前路28 號 7 樓 客服信箱
Copyright © 元照出版 All rights reserved. 版權所有,禁止轉貼節錄