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題 名 | 金門栗喉蜂虎營巢地及生殖族群變遷監測=Monitoring the Changes of Nesting Sites and Breeding Population Size of Blue-tailed Bee-eater (Merops Phlippinus) on Kinmen Island |
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作 者 | 王怡平; 袁孝維; | 書刊名 | 國家公園學報 |
卷 期 | 15:2 民94.12 |
頁 次 | 頁31-41 |
分類號 | 388.05 |
關鍵詞 | 金門; 栗喉蜂虎; 族群量監測; 營巢地; Kinmen island; Blue-tailed bee-eater; Population monitoring; Nesting site; |
語 文 | 中文(Chinese) |
中文摘要 | 栗喉峰虎(Merops phlippinus)是金門的夏侯鳥,在砂質的土壁上挖洞為巢,採行集體或單獨巢。我們自2002-2004年進行三年的全島營巢地調查及生殖數量計算,監測栗喉蜂虎在金門島上營巢地變遷及數量變化的情形。結果發現某些營巢坡面的蜂虎生殖數量逐年減少,可能和營巢坡面上植被生長和舊有巢洞留存道致可能營巢空間受限有關。我們在生殖族群數量計算上採直接數算法,並於2004年另外使用間接估算法計數,三年的直接數算法結果為800、500及500,可能隨著金門島上大型營巢地的減少,使得營巢地變得分散而不易被調查人員尋到,造成觀察數量下降。2004年間 接估算法數量約為2400隻,和直接數算法差異甚大但較接近蜂虎在夜棲直接數算的結果,可能因為觀察時不易見營巢地大部份的個體導致。間接做算法較雜,然較接近實際數目,而直接數算法較容易,可以為年與年之間的比較。 |
英文摘要 | Blue-tailed bee-eaters (Merops philippinus) are summer migrants that breed on Kinmen Island. They dig nest burrows on vertical sandy banks; breed solitarily or colonially. We monitored the distribution of nesting site and breeding population size of bee-easters on Kinmen Island from 2002-2004. We found in some nesting sites the breeding population decreased comparing to previous years. Vegetation overgrowth and the presence of old nesting burrows on the slope might cause breeding space less available. Population sizes were estimated as 800, 500, and 500 individuals in 2002, 2003, and 2004, respectively, with direct count at their breeding sites. However, it was estimated as 2,400 with indirect mathematic calculation, which was closer to population size estimation from direct count at their roosting sites. Indirect calculation was complicated needed more data, but would be more accurate. Direct count was easier to conduct but would underestimate the population size for not being able to see all the individuals at their breeding sites and to find all the dispersed small sites. Therefore, it could only be used for comparison purpose between years. |
本系統中英文摘要資訊取自各篇刊載內容。