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題 名 | 大肚溪口與鰲鼓渡冬短耳鴞(Asio flammeus)食性初探=Winter Diet of the Short-eared Owl Asio flammeus (Pontoppidan) at the Augu Farm and the Tatu Rivermouth of Taiwan |
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作 者 | 林文隆; 葉金彰; | 書刊名 | 特有生物研究 |
卷 期 | 4:2 2002.07[民91.07] |
頁 次 | 頁63-71 |
分類號 | 388.892 |
關鍵詞 | 短耳鴞; 食繭; 生物量; 食餌區位廣度; 食餌均勻度; Short-eared owl; Pellet; Biomass; Food-niche-breadth; Food evenness; |
語 文 | 中文(Chinese) |
中文摘要 | 研究期間(1995-1996;1999-2000)在大肚溪口南岸及鰲鼓農場共蒐集短耳鴞食繭129個,食繭平均大小為20,316.9±3,669.2 mm3,重量為2.3±1.3g。大肚溪口短耳鴞食繭(n=47)內容物包含5個類群的食餌,分別為小型哺乳類、鳥類、爬蟲類、昆蟲與蚯蚓。鰲鼓農場短耳鴞食繭(n=82)則有小型哺乳類、鳥類、爬蟲類、昆蟲等4類。綜合來說,短耳鴞捕食小型哺乳類的頻率最高,約占全部食餌的61.0%(53.5-65.1%),其次為鳥類20.8%(17.1-22.8%)、昆蟲13.0%(6.5-24.7%)、爬蟲4.2%(1.8-5.5%)、蚯蚓1.0%(0-2.9%)。從短耳鴞消耗的食餌生物量來看,以哺乳類被消耗最多,約占全部生物量的65.4%(65.2-65.9%)。鳥類占第二位,約占全部的28.5%(23.9-30.4%)。其餘依序為昆蟲3.5%(1.6-8.2%)、爬蟲類2.5%(1.7-2.8%)及蚯蚓0.09%(0-0.3%)。在已鑑定的各物種中,被消耗的生物量中以赤背條鼠(Apodemus agrarius)最多,占全部食餌生物量的30.4%。其次為小黃腹鼠(Rattus losea)15.3%及鶇類(Turdus spp.)10.6%,其餘各物種占的比例皆低於10.0%。臺灣渡冬短耳鴞的食餌區位廣度(food-niche-breadth, FNB)為7.41,食餌均勻度(food evenness)為0.799,皆比歐美地區之1.87及0.435為高。 |
英文摘要 | We collected 129 pellets of the short-eared owl Asio flammeus Pontoppidan (1763), 82 from the Augu Farm and 42 from the Tatu Rivermouth area, during the winter periods of 1995 to 1996 and 1999 to 2000. The pellets were 20.31±3.66 cm3 (mean±standard deviations) in volumes and 2.3±1.3g in dry weights. They consisted of five taxonomic groups of preys, small mammals, birds, reptiles, insects, and earthworms, for those from the Tatu Rivermouth, and the same groups except earthworms for those from the Augu Farm. Small mammals were the most dominant, and then followed by birds, insects, reptiles, and earthworms. The average percent compositions in terms of the total number and total weight (biomass) were, respectively, 61.0% and 65.5% for small mammals, 20.8% and 28.5% for birds, 13.0% and 3.5% for insects, 4.2% and 2.5% for reptiles, and 1.0% and 0.09% for earthworms. For the prey items identified, the Formosan striped field mouse Apodemus agraris occupied 30.4% of the total prey biomass, while the brown country rat Rattus losea was 15.3% and thrushs Turdus spp. were 10.6%. The FNB value and food evenness were, respectively, 7.41 and 0.799, which were higher than 1.87 and 0.435 in North America and Europe. |
本系統中英文摘要資訊取自各篇刊載內容。