加拿大圣劳伦斯河口斑海豹幼崽数量和断奶前存活率的时空变化。

IF 1 4区 生物学 Q3 ZOOLOGY Canadian Journal of Zoology Pub Date : 2023-06-10 DOI:10.1139/cjz-2023-0005
Limoilou-A Renaud, Gabriel Pigeon, Joanie Van de Walle, X. Bordeleau, M. Hammill, F. Pelletier
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引用次数: 0

摘要

自20世纪70年代过度捕捞以来,世界范围内的海洋哺乳动物种群从保护措施中受益匪浅,许多鳍状动物种群已经恢复。然而,副渔获物、种间相互作用或气候变化所造成的威胁仍然存在,因此,对野生种群的有效管理和保护至关重要的是详细了解种群动态、种群动态及其对环境变化的反应。在这项研究中,我们量化了1998年至2019年在圣劳伦斯河口比克岛和msamutis站点的单独标记港湾海豹(Phoca vitulina Linnaeus, 1758)幼崽在断奶前的数量和存活率。我们使用标记-再捕获模型来评估关于幼崽生命最初30天内每日断奶前存活率和捕获概率变化的竞争性假设。在过去的20年里,比克岛的幼崽丰度从76 (95% CI:[59, 101])增加到323 (95% CI: 233, 338),姆萨梅蒂斯的幼崽丰度从66 (95% CI:47, 91)增加到285 (95% CI: 204, 218)。Bic组的断奶前存活率(0.73 [95% CI: 0.58,0.82])普遍高于msamutis组(0.68 [95% CI: 0.52,0.79])。我们假设,栖息地和人为干扰的差异导致了母鼠断奶前存活率的降低,但需要进行行为学研究来了解哺乳期间干扰对母崽互动的影响。
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Spatiotemporal variation in pup abundance and pre-weaning survival of harbour seals (Phoca vitulina) in the St. Lawrence Estuary, Canada.
Marine mammal populations worldwide greatly benefitted from conservation measures put in place since the 1970s following overexploitation, and many pinniped populations have recovered. However, threats due to bycatch, interspecific interactions or climate change remain, and detailed knowledge on vital rates, population dynamics and their responses to environmental changes is essential for efficient management and conservation of wild populations. In this study, we quantified pup abundance and survival of individually marked harbour seal (Phoca vitulina Linnaeus, 1758) pups during the preweaning period at Bic Island and Métis sites in the St. Lawrence Estuary from 1998 – 2019. We used mark-recapture models to evaluate competing hypotheses regarding variation in daily preweaning survival rates and capture probability during the pups’ first 30 days of life. Pup abundance increased from 76 (95% CI: [59, 101]) to 323 [95% CI: 233, 338] in the past two decades at Bic Island and from 66 [95% CI:47, 91] to 285 [95% CI: 204, 218] at Métis. Preweaning survival was generally higher at Bic (0.73 [95% CI: 0.58,0.82]) than at Métis (0.68 [95% CI: 0.52,0.79]). We hypothesize that differences between habitats and human disturbance contribute to lower preweaning survival at Métis, but behavioural studies are needed to understand the impacts of disturbance on mother-pup interactions during the nursing period.
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来源期刊
Canadian Journal of Zoology
Canadian Journal of Zoology 生物-动物学
CiteScore
2.40
自引率
0.00%
发文量
82
审稿时长
3 months
期刊介绍: Published since 1929, the Canadian Journal of Zoology is a monthly journal that reports on primary research contributed by respected international scientists in the broad field of zoology, including behaviour, biochemistry and physiology, developmental biology, ecology, genetics, morphology and ultrastructure, parasitology and pathology, and systematics and evolution. It also invites experts to submit review articles on topics of current interest.
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