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頁籤選單縮合
題 名 | 大甲溪鴛鴦捕捉技術與年齡性別判定=Trapping Techniques and Determination of Age and Sex in the Mandarin Duck of the Tachia Stream |
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作 者 | 孫元勳; 林裕盛; 黃園真; 李彥芸; | 書刊名 | 國家公園學報 |
卷 期 | 11:1 2001.06[民90.06] |
頁 次 | 頁59-70 |
分類號 | 388.896 |
關鍵詞 | 鴛鴦; 陷阱; 年齡; 性別; 換羽; Mandarin ducks; Aix galericulata; Trapping; Age; Sex; Molting; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究於1999年1月至12月在雪霸國家公園境內大甲溪上游的七家灣溪和有勝溪,以陷阱捕捉鴛鴦(Aix galericulata Linn.),其目的在測試兩種陷阱的捕捉率、判定非繁殖季的性別與年齡之差異、記錄幼鴨成長和換羽行為。我們發現本研究自創的懸門陷阱之捕捉率高於國外經常使用的漏斗門陷阱,而有噴綠色漆的陷阱捕捉率略高於無噴漆陷阱,捕捉率和性別與被捕經驗無關聯。繁殖期間與繁殖期之前的1-6月份,雄鴨重覆被捕率(45.4%)高於雌鴨(0%),相對地,繁殖季後的7-10月份此雌鴨的重覆被捕率(72.7%)有增加的情形,雄鴨(44.4%)則沒有明顯差異。7-8月份雄鴨的蝕羽(eclipse plumage)酷似雌鴨,此一時期由雌鴨翼鏡持有的白斑來判斷性別會比傳統使用的喙色準確;這個時期,由胸腹部羽毛的斑紋之濃密可以判別幼鴨與成鴨個體。所有測量形質�堙A附蹠是幼鴨成長比較快速的部份。 |
英文摘要 | The study was conducted along the Tachia Stream and its upper tributaries, Chichiawan and Jiozen Streams, at the Shei-pa National Park from January to December 1999. We trapped the Mandarin ducks (Aix galericulata Linnaeus) to compare the capture rates of two kinds of traps. The body measurements of the captured birds were made to determine their difference in age and sex during the period of eclipse plumage. We also documented duckling growth and molting behavior. Our results showed that door-suspended trap captured more ducks than did funnel entrance trap. Trap in green seemed to have slightly higher capture rate than did that without treatment. Capture rate was not correlated with sex and captured experience. Before and during breeding season (January-July), recapture rate of drakes (45.4%) was higher than ducks (0%), however recapture rate of ducks (72.7%) increased dramatically after breeding season (July-October). In July-August when drakes in eclipse plumage look very much like ducks. It is more precise using the white patches found only on the female's speculum than bill color in terms of sexing. The more streaked underpart of yearling can be used to tell them apart from adult during July and September. The duckling tarsus appeared to reach adult size earlier than the rest of body parts measued. |
本系統中英文摘要資訊取自各篇刊載內容。