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首页> 外文期刊>Canadian Journal of Zoology >Reproductive success of bald eagles (Haliaeetus leucocephalus) and its association with habitat or landscape features and weather in southeast Alaska
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Reproductive success of bald eagles (Haliaeetus leucocephalus) and its association with habitat or landscape features and weather in southeast Alaska

机译：白头鹰（Haliaeetus leucocephalus）的繁殖成功及其与阿拉斯加东南部的栖息地或景观特征和天气的关系

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摘要

Long-term data have been collected on nesting bald eagles (Haliaeetus leucocephalus) in three areas of southeast Alaska. The average density of active nests was among the highest recorded, but nest productivity (average number of young fledged per active nest) and success (percentage of active nests that fledged at least one young) were similar to values in other areas. Using logistic regression, nest productivity was associated with several habitat or landscape features (productivity was highest in proximity to spawning herring and at a particular location), each of which could be related to the availability of prey (fish) in the early spring (April, May) during egg laying and incubation. Consistency of nesting success was associated with the presence of tidal flats at one study site. Nest use, but not nesting success, was related to nesting success the previous year. Multiple regression showed that fewer nests per kilometre were successful in years with a high frequency of spring rains.
机译：在阿拉斯加东南部的三个地区，已收集到有关筑巢白头鹰（Haliaeetus leucocephalus）的长期数据。活动巢的平均密度是记录的最高值之​​一，但巢的生产力（每个活动巢中幼雏的平均数量）和成功率（至少繁殖出一个幼雏的活动巢的百分比）与其他地区的值相似。使用logistic回归，巢的生产力与多个栖息地或景观特征相关联（在产卵鲱鱼附近和特定位置生产力最高），每一个都可能与早春（4月）的猎物（鱼）的可用性有关。 ，五月）在产卵和孵化期间。套巢成功的一致性与一个研究地点的滩涂的存在有关。嵌套的使用与上一年的嵌套成功有关，但与嵌套成功无关。多元回归分析表明，在春季雨水频发的年份，每公里的巢数较少。

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