不列颠哥伦比亚省三角岛灰翅鸥的迁徙和冬季栖息地利用

Pub Date : 2022-07-29 DOI:10.1675/063.044.0405
Alice D. Domalik, M. Maftei, Kenneth G. Wright, Sarah A. Hudson (Trefry), J. Hipfner
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引用次数: 0

摘要

摘要了解海鸟的活动和栖息地的利用对保护和海洋空间规划至关重要。在这里,卫星发射器被用来研究成年白翅鸥(Larus glaucescens)的迁徙和冬季栖息地的使用,这些白翅鸥来自不列颠哥伦比亚省中部的一个殖民地。四分之三的海鸥在当地越冬,而第四只则沿着沿海迁徙路线前往加州北部。所有四种海鸥的冬季栖息地范围都很小,平均72%的时间都在近岸沿海水域度过(到海岸的平均距离:0.6-1.7公里),其特征是人类活动水平较低。剩下的时间是在自然植被覆盖的地区度过的。一只海鸥在人口密度高的地区(加利福尼亚北部)越冬,该地区的耕地(4%的地区)和城市(6%的地区)的利用有限。这项研究是正在进行的努力的一部分,旨在了解不列颠哥伦比亚省海洋鸟类的分布和栖息地的利用,为各种尺度的海洋空间规划和相关威胁提供信息。
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Migration and Winter Habitat Use of Glaucous-Winged Gulls (Larus glaucescens) from Triangle Island, British Columbia
Abstract. Understanding the movements and habitat use of marine birds is essential to inform conservation and marine spatial planning. Here, satellite transmitters were used to study the migration and winter habitat use of adult Glaucous-winged Gulls (Larus glaucescens) from a colony in central British Columbia. Three of four tracked gulls overwintered locally, while the fourth followed a coastal migration route to northern California. All four gulls maintained small winter home ranges and spent an average of 72% of their time in nearshore coastal waters (average distance to coast: 0.6-1.7 km) characterized by low levels of anthropogenic activity. The remainder of their time was spent in naturally vegetated areas. One gull overwintered in an area with high human population density (northern California), with limited use of cropland (4% of locations) and urban (6% of locations) areas. This study is part of on-going efforts to understand the distribution and habitat use of marine birds throughout British Columbia to inform marine spatial planning and associated threats at various scales.
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