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首页> 外文期刊>The Canadian Field-Naturalist >Conspecific cues encourage Barn Swallow (Hirundo rustica erythrogaster) prospecting, but not nesting,at new nesting structures
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Conspecific cues encourage Barn Swallow (Hirundo rustica erythrogaster) prospecting, but not nesting,at new nesting structures

机译：Conspecific提示鼓励谷仓吞咽（Hirundo rustica erythrogaster）勘探，但不是在新的筑巢结构上筑巢

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摘要

Shed-like structures are being built to provide Barn Swallow (Hirundo rustica erythrogaster) nesting habitat in response to population declines. However, Barn Swallow use of these structures is unavailable in the literature. We conducted three manipulative experiments to test if adding conspecific cues (i.e., vocalizations and decoys) to newly-built structures affected prospecting visits by Barn Swallows (1) during pre-breeding, (2) during post-breeding, and (3) during or after broadcasts of vocalizations compared to before broadcasts. Additionally, we monitored nesting following pre- and post-breeding cues. We built one nesting structure with and one without conspecific cues at each of 10 study sites in southern Ontario, Canada where nesting habitat was recently lost. We detected about twice as many Barn Swallows immediately after conspecific broadcasts compared to before. We did not find substantial differences in abundance and interactions with new nesting structures for other comparisons involving conspecific cues. Following pre-breeding cues at 10 sites, six nests were built in three of 10 structures treated with conspecific cues,compared to five nests in four of 10 structures without cues. In the subsequent breeding season following post-breeding cues at eight sites,four nests were built in two of eight structures treated with conspecific cues, compared to four nests in three of eight structures without cues. Conspecific vocalizations appeared to increase prospecting behaviour, but not the number of nests, at new nesting structures. The paucity of nests on new structures suggests that building shed-like structures may not be an effective method of mitigating loss of nesting habitat.
机译：正在建造类似的结构，以提供谷仓燕子（Hirundo rustica erythrogaster）嵌套栖息地，以应对人口下降。然而，谷仓吞咽使用这些结构在文献中不可用。我们进行了三项操纵实验，以测试在育种期间在预育种期间通过谷仓吞咽（1）在新建的结构中添加了对新建的结构的勘探前景，（2）期间，（3）或者在广播之前比较的发声广播之后。此外，我们在预先生后和后期的提示之后监测嵌套。我们在加拿大南安大略省南部的10场学习景点中建造了一个筑巢结构，一个没有成熟的线索，最近陷入嵌套栖息地。与以前相比，我们检测到三次谷仓吞咽后的两倍。我们没有发现与新嵌套结构的丰富和交互相互作用，以便其他涉及Conspectific提示的比较。在10个地点的预育种线索之后，六个巢穴中建成了三个用心特异性线索处理的三种结构中，而在10个结构中的四个巢中有五个没有提示。在八个地点后育种线索后的随后的繁殖季节中，有四个巢穴中建于八个结构中的两种结构中，与4个结构中的四个巢穴相比，没有提示。 Conspecific的发声似乎增加了勘探行为，而不是新的嵌套结构的巢穴数量。新结构上的巢穴的缺乏表明，建筑物类似的结构可能不是减轻嵌套栖息地丧失的有效方法。

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