| 长耳鸮冬季的捕鼠特点 |
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| 引用本文： | 张健旭,曹玉萍.长耳鸮冬季的捕鼠特点[J].河北大学学报(自然科学版),1999(2). |
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| 作者姓名： | 张健旭 曹玉萍 |
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| 作者单位： | 中国科学院动物研究所(张健旭)，河北大学生物系(曹玉萍) |
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| 基金项目： | 国家自然科学基金,国家攻关课题 |
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| 摘 要： | 长耳号鸟越冬期食物的９１．０％为鼠类。所捕食的农田鼠（黑线仓鼠、黑线姬鼠、大仓鼠和棕色田鼠）占５６．８％，居民区鼠类（大家鼠和小家鼠）占３４．２％，体形较小的鼠类（黑线仓鼠、黑线姬鼠、小家鼠和田鼠）占８２．０％，其中田鼠偶尔出现，较大型鼠类（大仓鼠和大家鼠）仅占９．０％；所捕食鼠的年龄多为亚成体（３８．９％）和成体（３９．２％）；所捕食的主要３种鼠（黑线仓鼠、黑线姬鼠和小家鼠）的年龄组成与野外种群的年龄组成一致。１只长耳号鸟平均１ｄ吃１．７９只或５４．３８ｇ鼠。
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| 关 键 词： | 长耳号鸟 冬季 食物组成 鼠类年龄结构 |
Characteristics of Species and Age Composition of Rodents Fed by Asio otus in Winter |
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| Author ZHANG Jian_xu,CAO Yu_ping.Characteristics of Species and Age Composition of Rodents Fed by Asio otus in Winter[J].Journal of Hebei University (Natural Science Edition),1999(2). |
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| Authors: | Author ZHANG Jian_xu CAO Yu_ping |
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| Institution: | Author ZHANG Jian_xu1,CAO Yu_ping2 |
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| Abstract: | Rodent percentage of animals fed by Asio otus in winter was 91.0%,which included Cricetulus barabensis, Apodemus agrarius, Mus musculus,Rattus novegicus, Cricetulus triton and Microtus spp. Farmland rodents (Cricetulus barabensis, Apodemus agrarius, Cricetulus triton andMicrotus spp.) are 56.8%, commensal rodents (Mus musculus and Rattus novegicus) are 34.1%;Smaller rodents(Cricetulus barabensis, Apodemus agrarius, Mus musculus and Microtus spp.) were 81.7%. Larger rodents(Rattus novegicus and Cricetulus triton) only 9.0%. Subadults and adults of rodents fed by Asio otus were 38.9% and 39.2%,respectively. Monthly change in age distribution of main three species of Cricetulus barabensis, Apodemus agrarius and Mus musculus showed similarity with those of these rodents' wild populations. This indicated that Asio otus hunted rodents at random. On the average, one owl consumed about 1.79 individuals or 54.38 g of rodents every day. |
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| Keywords: | Asio otus winter rodent species age composition of rodents |
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