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首页> 外文期刊>The wilson journal of ornithology >Repeated Brood Parasitism by Brown-Headed Cowbirds (Molothrus ater)at Nesting Sites of Eastern Phoebes (Sayornis phoebe) across Non-consecutive Years
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Repeated Brood Parasitism by Brown-Headed Cowbirds (Molothrus ater)at Nesting Sites of Eastern Phoebes (Sayornis phoebe) across Non-consecutive Years

机译:在不连续的几年中,东部菲比(Sayornis phoebe)的筑巢地的棕头牛鸟(Molothrus ater)反复发生巢寄生

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摘要

The temporal and spatial patterns of avian brood parasitism can critically influence host fitness, the coevolution of parasitic strategies and host resistance, and their reciprocal effects on population dynamics. This study examined spatial patterns of Brown-headed Cowbird (Molothrus ater) parasitism on Eastern Phoebe (Sayornis phoebe) hosts in 2009-2011 near Ithaca, NY, USA, and compared them with published data from 1999-2002 at the same nest sites, encompassing a period long enough for a turn-over of most of the breeding adult host and parasite populations. Relative to non-parasitized nests, host nests, that were more likely to be parasitized annually in 2009-2011, had also been parasitized more often during years 1999-2002. These findings are consistent with the hypothesis that Brown-headed Cowbirds, even across generations, show a consistent preference for particular Eastern Phoebe nest sites. It remains unclear what the relative roles of the biological traits of the hosts occupying those sites versus the ecological and physical characteristics of the actual nest sites may be in yielding these patterns. Nonetheless, the results imply that knowing the site-specific histories of parasitism of reusable nests and breeding sites can be used to predict variation in the risk and future impact of cowbirds on this host species.
机译:禽类寄生虫的时空格局会严重影响寄主的健康状况,寄生策略和寄主抵抗力的共同演变以及它们对种群动态的相互影响。这项研究调查了美国纽约州伊萨卡市附近2009-2011年东部菲比(Sayornis phoebe)寄主上的棕头牛bird(Molothrus ater)寄生的空间格局,并将它们与1999-2002年相同巢穴的已发表数据进行了比较,涵盖了足够长的一段时间,足以应付大多数成年寄主和寄生虫种群的交接。相对于非寄生巢,寄主巢在2009-2011年更可能每年被寄生,而在1999-2002年间也经常被寄生。这些发现与这样的假设是一致的,即即使是几代人,棕头牛鸟也始终对特定的东方菲比巢穴表现出一致的偏爱。尚不清楚占据这些位点的寄主的生物学特性与实际巢位的生态和物理特征之间的相对作用可能是如何产生这些模式的。然而,结果暗示了解特定位置的可重复利用巢和繁殖场所寄生虫病的历史可用于预测牛鸟对该寄主物种的风险和未来影响的变化。

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  • 来源
    《The wilson journal of ornithology》 |2013年第2期|389-394|共6页
  • 作者单位

    Animal Behavior and Conservation Program, Department of Psychology, Hunter College, 695 Park Avenue,New York, NY 10065, USA,Anthropological Institute and Museum, University of Zurich, Winterthurerstrasse 190, Zurich, CH-8057, Switzerland;

    Animal Behavior and Comparative Psychology Training Area, Psychology Doctoral Program, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, NY 10016, USA;

    Ecology, Evolutionary Biology, and Behavior Subprogram in Biology, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, NY 10016, USA;

    Animal Behavior and Conservation Program, Department of Psychology, Hunter College, 695 Park Avenue,New York, NY 10065, USA,Animal Behavior and Comparative Psychology Training Area, Psychology Doctoral Program, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, NY 10016, USA,Ecology, Evolutionary Biology, and Behavior Subprogram in Biology, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, NY 10016, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    arms race; brood parasite; lifespan; repeated parasitism;

    机译:军备竞赛;繁殖寄生虫寿命;反复寄生;

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