| 安氏薮羚的性二型对采食行为的影响(英文) |
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| 引用本文： | Taryn KIRBY,Graeme SHANNON,Bruce PAGE,Rob SLOTOW. 安氏薮羚的性二型对采食行为的影响(英文)[J]. 动物学报, 2008, 54(4) |
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| 作者姓名： | Taryn KIRBY Graeme SHANNON Bruce PAGE Rob SLOTOW |
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| 作者单位： | Amarula Elephant Research Programme;School of Biological and Conservation Sciences;University of KwaZulu-Natal;Westville Campus; |
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| 基金项目： | This research was partly funded by NRF grant (No.2053623) to RS |
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| 摘 要： | 安氏薮羚(Tragelaphus angasii)是具有性别体二型的动物,其体型大小的差异可能对采食行为和生境选择有显著影响.利用连续行为取样法检测了雌雄个体在生境和植物利用上的差异,记录采食植物种类和采食高度并进行了性别间比较.在每个采食周期末,采用点中心方形样方法(PCQ)对植被进行一次调查,利用判别函数分析鉴别雌雄个体之间在种类和高度上是否存在差异.雌羚在三类生境中花费的采食时间相似,但雄羚表现出对砂地林的偏好.另外,在同一生境内雄羚利用更多的木本种类且采食较高的部位,而雌羚喜欢采食低层草本植物.安氏薮羚雌雄个体在生境内具有食性(采食种类)和空间(生境斑块)上的分离.我们认为这是由性二型引起的性别间营养与能量需求差异和不同繁殖策略造成的,最终使得精食者动物在具有复杂结构空间异质性的生境内表现为空间性别分离
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| 关 键 词： | 性别分离 采食 精食者 行为 |
The influence of sexual dimorphism on the foraging behaviour of the nyala Tragelaphus angasii |
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| Taryn KIRBY,Graeme SHANNON,Bruce PAGE,Rob SLOTOW. The influence of sexual dimorphism on the foraging behaviour of the nyala Tragelaphus angasii[J]. Acta Zoologica Sinica, 2008, 54(4) |
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| Authors: | Taryn KIRBY Graeme SHANNON Bruce PAGE Rob SLOTOW |
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| Affiliation: | 1. Amarula Elephant Research Programme,School of Biological and Conservation Sciences,Universit of Kwazulu-Natal,Westville Campus,University of KwaZulu-Natal,Private Bag X54001,South Africa;C/O Ithala Game Reserve,P.O.Box 42,Louwsurg 3150,South Africa
2. Amarula Elephant Research Programme,School of Biological and Conservation Sciences,Universit of Kwazulu-Natal,Westville Campus,University of KwaZulu-Natal,Private Bag X54001,South Africa |
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| Abstract: | Sexual dimorphism is pronounced in nyala Tragelaphus angasii and is predicted to have a significant influence on their foraging behaviour and habitat selection due to the allometric relationships associated with increasing body size. A continuous behavioural sampling method was used to detect male and female differences in habitat and plant utilisation. Food species were recorded and feeding heights compared between the sexes. Vegetation surveys were conducted once a feeding bout had ended using the point c... |
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| Keywords: | Sexual segregation Foraging Browser H erbivore |
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