Factors influencing susceptibility of host nests to brood parasitism
Factors influencing susceptibility of host nests to brood parasitism
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影响寄主巢穴对巢寄生敏感性的因素
DOI：
10.1080/08927014.2003.9522661
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
S. Sealy
中科院分区：
文献类型：
--
作者：
C. M. Mclaren;S. Sealy
我们调查了马尼托巴三角洲沼泽地的歌麻雀（Melospiza melodia）巢对巢搜寻的褐头牛鹂（Molothrus ater）发现的敏感性。我们评估的重要性，巢栖息地和微生境以及主机活动的影响寄生的可能性，通过测量植被和行为的主机在巢（1）不寄生，（2）寄生一次和（3）寄生一次以上，由同一个女性或由一个以上的女性（即多重寄生）。没有测量的变量是显着相关的寄生，但非显着的趋势一致，在这两年的研究表明，隐藏和主机显着发挥重要作用，但量化它们是困难和复杂的。一个显着的关系巢质量和寄生的概率进一步支持这一建议，因为巢质量应该反映筑巢活动作为一个整体。
We investigated susceptibility of Song Sparrow (Melospiza melodia) nests to discovery by nest-searching Brown-headed Cowbirds (Molothrus ater) at Delta Marsh, Manitoba. We assessed the importance of nest habitat and microhabitat as well as host activity in influencing the likelihood of parasitism by measuring vegetation and behaviour of hosts at nests that were (1) not parasitized, (2) parasitized once and (3) parasitized more than once, by the same female or by more than one female (i.e. multiple parasitism). None of the variables measured was significantly related to parasitism, but non-significant trends consistent in both years of the study suggested that concealment and host conspicuousness play important roles, but quantifying them is difficult and complex. A significant relationship between nest mass and the probability of parasitism further supports this suggestion, because nest mass should reflect nest-building activity as a whole.