Fisher Jason T, Jahid Mehnaz, Gutsell Robin, Hubbs Anne, Cowen Laura L E, Barrueto Mirjam, Heim Nicole, Paczkowski John
School of Environmental Studies University of Victoria Victoria British Columbia Canada.
Department of Mathematics and Statistics University of Victoria Victoria British Columbia Canada.
Ecol Evol. 2024 Dec 30;15(1):e70702. doi: 10.1002/ece3.70702. eCollection 2025 Jan.
Wolverines () are a circumboreal species that has experienced substantial range reduction worldwide. In Canada, the wolverine has been extirpated entirely from the east, and from prairie regions in the west. The province of Alberta holds the south-central portion of wolverines' Canadian range, and there they have been designated as since 2001 due to a historical lack of information. Our aim was to provide a first approximation of a wolverine abundance estimate at the provincial scale to inform science-based management as well as status designation. We synthesised existing density estimates and wolverine-habitat relationships to create a province-wide density estimate for wolverines. Densities were derived from five landscapes, spanning protected National Parks in the Rocky Mountains, the highly developed Foothills and the northcentral and northwestern boreal forests. Densities were estimated using spatially explicit capture-recapture (SECR) models. Densities ranged from 6.74 wolverines/1000 km in the northwest boreal to 0.71 wolverines/1000 km in the foothills. The proportion of adults was based on a study from the northwest, which estimated 57% adults to 43% subadults. Extrapolating densities across natural subregions (bioclimatic ecoregions), based on known habitat relationships, it was estimated that there were 955 wolverines in the province, of which 544 were adults. This number falls well below an IUCN threshold for a legally listed species; we suggest a reassessment of the wolverine status in Alberta and considering commensurate conservation actions.
貂熊是一种环北极分布的物种，在全球范围内其分布范围已大幅缩小。在加拿大，貂熊在东部已完全灭绝，在西部的草原地区也已消失。艾伯塔省拥有貂熊在加拿大分布范围的中南部地区，由于历史上缺乏相关信息，自2001年以来它们在该省被列为[此处原文缺失相关指定信息]。我们的目标是在省级尺度上对貂熊的数量进行初步估算，为基于科学的管理以及物种状态指定提供依据。我们综合了现有的密度估算和貂熊与栖息地的关系，以创建全省范围内貂熊的密度估算。密度数据来自五个地区，包括落基山脉的受保护国家公园、高度发达的山麓地区以及中北部和西北部的北方森林。密度是使用空间明确的捕获再捕获（SECR）模型估算的。密度范围从西北北方森林的每1000平方公里6.74只貂熊到山麓地区的每1000平方公里0.71只貂熊。成年貂熊的比例基于一项来自西北部的研究，该研究估计成年貂熊占57%，亚成年貂熊占43%。根据已知的栖息地关系，在自然亚区域（生物气候生态区）外推密度，估计该省有955只貂熊，其中544只是成年貂熊。这个数字远低于世界自然保护联盟（IUCN）对法定列出物种的阈值；我们建议重新评估艾伯塔省貂熊的状态，并考虑相应的保护行动。
