繁殖期两种百灵科鸟类对捕食风险的行为响应
Behavioral Responses of Two Species Passerine to Predation Risk During Breeding Period
查看参考文献37篇
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文摘
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生活史理论认为亲代对捕食风险的不同响应影响亲代资源在繁殖中的分配比例,为检验这一理论,于2002-2004年的4-9月以青藏高原高寒草甸的角百灵(Eremophila alpestris)和小云雀(Alauda gulgula)为研究对象,通过捕食风险处理实验,研究了两种鸟对不同强度捕食压的响应.结果表明:在自然条件下,二者繁殖行为存在显著差异,而在捕食压力下二者的行为反应没有差异.在捕食风险下,二者亲鸟缩短伴巢时间,减少递食率,延长消失时间;二者雄性的风险容忍度均低于雌性.此外,角百灵亲代对人类活动的响应较小云雀敏感.以上结果表明,这两种百灵科鸟类通过降低当前的繁殖投入和提高未来存活概率来响应捕食风险,支持上述生活史理论的观点. |
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其他语种文摘
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Life-history theory predicts that differences in reproductive effort and residual reproductive value among species should result in differences in the level of risk that parents are willing to tolerate to themselves versus their off-spring . Here, we tested the prediction that parental investment decisions were correlated with nest sites by comparing risk - taking behaviour in two species of passerines (small skylark Alauda gulgula and horned lark Ererrwphila alpestris) in alpine meadow, from 2002 to 2004. We experimentally manipulated predation risk by presenting models and measured the willingness of parents to feed nestlings. The results shown: Response of the horned lark to human intrusion was a signifi-cantly stronger than the small skylark; Both species responded to predators by decreasing the length of attendance time, reducing the feeding rate and increasing the length of elapsed time; There was significantly difference between the repro-ductive behaviour in the small skylark and horned lark in the natural condition, whereas, no difference in the predator condition; Males of both species had lower willingness to tolerate risk to themselves than females. Thus, those passerine species responded to predators by reducing investment in current reproduction and increasing probability of future survival. Our experimental results support the above prediction. |
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来源
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动物学研究
,2005,26(2):113-117 【核心库】
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关键词
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鸟类
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亲代投资
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捕食风险
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巢址
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人为干扰
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地址
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中国科学院西北高原生物研究所, 青海, 西宁, 810001
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0254-5853 |
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学科
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动物学 |
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基金
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国家自然科学基金资助项目
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文献收藏号
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CSCD:1928880
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