頁籤選單縮合
題名 | 以覆網實驗研究濱鷸之覓食生態=A Study of the Feeding Ecology of the Dunlin (Calidris alpina) by Exclosure Experiment |
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作者 | 陳炳煌; 蔡嘉揚; | 書刊名 | 東海學報 |
卷期 | 37:2(理學院) 民85.07 |
頁次 | 頁125-150 |
分類號 | 388.897 |
關鍵詞 | 覆網實驗; 濱鷸; 端腳類; 大肚溪河口; Exclosure experiment; Dunlin; Amphipods; Tatu estuary; |
語文 | 中文(Chinese) |
中文摘要 | 濱鷸是臺灣西海岸數量最多而且分佈很廣的水鳥之一。但對牠們在河口海岸潮間 灘地上的生態棲位仍不清楚,所以本篇論文的主要目的是透過覓食生態研究來瞭解濱鷸分 佈與豐度的機制,因此選擇彰化大肚溪口南岸的潮間灘地為研究地點來研究濱鷸的覓食生 態。共有四塊覓食地,其中兩塊是用來進行覆網實驗。 覆網實驗的原理是利用一隔離網架來阻隔濱鷸捕食端腳類為控制組,網架外可供濱鷸 覓食的灘地是實驗組。大約12∼19天後採樣比較端腳類的差量,而減少量應為這段時間在 此活動的濱鷸所捕食掉的,覆網實驗在1993年3月、4月和1994年2月、3月成功地比較出端 腳類的減少量,估算出濱鷸的覓食量大約是平均每小時吃掉3000隻端腳類,會隨著季節和 覓食地不同而有變化。經一年的調查証實濱鷸和端腳類在各覓食地的分佈有很好的線性關 係(r[]=0.85),也就是端腳類愈多的灘地會吸引愈多的濱鷸來覓食。 |
英文摘要 | The Dunlin is one of the most common shorebirds on the western coast of Taiwan. Its ecological niche in the coastal and estuarine ecosystem is still not clear. The aim of this study is to understand the mechanisms that regulate the distribution and abundance of the Dunlin on the southern part of the Tatu Estuary in Changhwa County by analyzing their feeding ecology. Exclosure experiments were carried out from March 1993 to March 1994 in order to estimate the effect of the Dunlin's feeding on the density of amphipods as compare to the density of this prey in the control area from which the Dunlin was excluded. Based on experiments in March and April 1993 and in February and March 1994 when the amphipod populations were most abundant, the feeding rate of a Dunlin is estimated to consume 3000 individual amphipods per hour. The rate varies according to the season and the feeding site. In addition, spatial distribution and temporal abundance of the Dunlin were correlated with those of the amphipods. there is a positive linear relationship (Rsq=0.85), between the spatial distribution of the Dunlin and amphipods. More abundant amphipods will attract more Dunlin to feed on that mudflat. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。