High adult survival in a northern Eurasian Curlew (Numenius arquata) population

IF 1 4区 生物学 Q2 ORNITHOLOGY Ornis Fennica Pub Date : 2023-10-23 DOI:10.51812/of.126810
Veli-Matti Pakanen, Reijo Kylmänen
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Abstract

Wetland birds such as waders are in decline across Europe. Information on demography is vital for assessing the causes of population declines, but estimates are needed from multiple populations and time periods. We used capture-recapture data from 2013–2022 including 134 individuals to estimate sex-specific apparent adult survival of Eurasian Curlews from a population breeding on agricultural fields in Finland, a stronghold region for this species in Europe. Using the Cormack–Jolly–Seber-model that considers the recapture probability of individuals, we estimated apparent survival of adults to be 0.89 (SE 0.03) for males and 0.92 (SE 0.03) for females. Our estimates of adult survival are slightly higher than those previously estimated from Fennoscandian breeding grounds in 1980s–1990s (0.82–0.88). Thus, our results suggest that adult survival of populations breeding in northern Europe has not declined during the last decades. Our study supports the view that changes in reproductive success is the main cause of decline in the Eurasian Curlew populations.
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欧亚北部鸻(Numenius arquata)种群成虫存活率高
在整个欧洲,像涉禽这样的湿地鸟类正在减少。人口统计资料对于评估人口下降的原因至关重要,但需要对多个人口和不同时期进行估计。我们使用2013-2022年的捕获-再捕获数据,包括134只个体,来估计来自芬兰农业领域种群繁殖的欧亚鸻的性别特异性表观成虫存活率,芬兰是该物种在欧洲的据点地区。使用考虑个体再捕获概率的cormack - jolly - seber模型,我们估计成年雄性的表观存活率为0.89 (SE 0.03),雌性为0.92 (SE 0.03)。我们估计的成虫存活率略高于上世纪80年代至90年代在芬诺斯坎地繁殖地估计的成虫存活率(0.82-0.88)。因此,我们的结果表明,在过去的几十年里,在北欧繁殖的种群的成虫存活率并没有下降。我们的研究支持这样一种观点,即繁殖成功率的变化是欧亚鸻种群数量下降的主要原因。
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来源期刊
Ornis Fennica
Ornis Fennica 生物-鸟类学
CiteScore
2.00
自引率
0.00%
发文量
14
审稿时长
>12 weeks
期刊介绍: Ornis Fennica is a peer-reviewed international ornithological journal published by BirdLife Finland. Ornis Fennica publishes analytical and experimental papers on the ecology, behaviour and biogeography of birds. Ornis Fennica prefers studies concerning Fennoscandian species, but other novel contributions of general interest are most welcome as well. Ornis Fennica is an open-access journal without page charges for publication. All published articles (from 1924 onwards) are freely available from the journal website. First decisions are usually made within three months of submission.
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