在骨料(砂石)坑和天然湖岸栖息地繁殖的岸燕(Riparia Riparia)的繁殖成功与健康

IF 2.6 2区 生物学 Q1 ORNITHOLOGY
Condor Pub Date : 2019-11-06 DOI:10.1093/condor/duz050
Tianna Burke, Michael D. Cadman, E. Nol
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引用次数: 3

摘要

摘要岸燕(Riparia Riparia)在加拿大被列为濒危物种,部分原因是湖岸和河流沿岸失去了自然繁殖栖息地。砂石坑(又称骨料坑)的挖掘增加了远离湖泊和河流的潜在筑巢栖息地的可用性,这些替代栖息地可能对稳定一些岸燕种群的减少很重要。在2年多的时间里,我们从安大略湖北岸悬崖沿线的2个天然湖岸栖息地和安大略省南部湖岸100公里范围内的7个集水坑收集了Bank Swallow繁殖成功的数据。湖岸栖息地的巢穴比骨料坑更早开始,2014年提前8天,2015年提前13天。两种生境类型之间的窝卵大小和雏鸟数量都没有差异。不同栖息地类型产生的雏鸟数量存在差异,在聚集体坑中筑巢的Bank Swallows每成功一窝都会养育更多的雏鸟。然而,在骨料坑中筑巢的鸟类也有明显更多的巢穴,即使这些巢穴中的蛋孵化了,也没有孵化出雏鸟。从骨料坑中繁殖的成虫最初比从湖岸栖息地繁殖的成虫重,但在筑巢季节,它们的质量显著下降。不同生境类型之间的幼体数量没有显著差异。来自骨料坑的初出茅庐的Bank Swallow身上的寄生虫数量明显低于来自湖岸的雏鸟。这些指标表明,聚集体坑至少可以为Bank Swallows提供与天然湖岸栖息地同等的栖息地,这可能是安大略省该物种恢复的关键。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Reproductive success and health of breeding Bank Swallows (Riparia riparia) in aggregate (sand and gravel) pit and natural lakeshore habitats
ABSTRACT Bank Swallows (Riparia riparia) are designated as Threatened in Canada, in part due to loss of natural breeding habitat along lakeshores and rivers. Excavation in sand and gravel pits (aka aggregate pits) has increased availability of potential nesting habitat away from lakes and rivers, and these substitute habitats may be important to stabilize the decline experienced by some Bank Swallow populations. Over 2 yr, we collected data on Bank Swallow reproductive success from 2 natural lakeshore habitat sites along bluffs of the north shore of Lake Ontario and 7 aggregate pits in southern Ontario, within 100 km of the lakeshore. Nests at the lakeshore habitat were initiated earlier than in aggregate pits, 8 days earlier in 2014 and 13 days earlier in 2015. Neither clutch size nor number of nestlings were different between the 2 habitat types. There were differences in the number of fledglings produced between the habitat types, with Bank Swallows nesting in aggregate pits raising more fledglings per successful nest. However, birds nesting in aggregate pits also had significantly more nests that raised no fledglings, even though eggs in those nests hatched. Breeding adults from aggregate pits were initially heavier than those from the lakeshore habitat, but their mass decreased significantly over the nesting season. Fledgling masses were not significantly different between habitat types. Parasite loads on fledgling Bank Swallows from aggregate pits were significantly lower than on fledglings from the lakeshore. These indicators suggest that aggregate pits can provide at least equivalent habitat for Bank Swallows to that provided by natural lakeshore habitat, making them potentially key for the recovery of this species in Ontario.
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来源期刊
Condor
Condor ORNITHOLOGY-
CiteScore
6.30
自引率
12.50%
发文量
46
审稿时长
6-12 weeks
期刊介绍: The Condor is the official publication of the Cooper Ornithological Society, a non-profit organization of over 2,000 professional and amateur ornithologists and one of the largest ornithological societies in the world. A quarterly international journal that publishes original research from all fields of avian biology, The Condor has been a highly respected forum in ornithology for more than 100 years. The journal is one of the top ranked ornithology publications. Types of paper published include feature articles (longer manuscripts) Short Communications (generally shorter papers or papers that deal with one primary finding), Commentaries (brief papers that comment on articles published previously in The Condor), and Book Reviews.
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