Results 21 to 30 of about 1,203,677 (298)
Beak morphology predicts apparent survival of crossbills: due to selective survival or selective dispersal? [PDF]
Journal of Avian Biology, 2019 Dozens of morphologically differentiated populations, subspecies and species of crossbills (genus Loxia ) exist. It has been suggested that this divergence is due to variation in the conifer cones that each population specialises upon, requiring a specific beak size to efficiently separate ...
Consorci del Museu de Ciències Naturals de Barcelona +6 more
openaire +2 more sources
Avian Conservation and Ecology, 2015 Populations of Leach's Storm-petrel (Oceanodroma leucorhoa; hereafter storm-petrel), one of the most widespread procellariiform seabirds in the world, appear to be declining in many parts of their breeding range.
Danielle T. Fife +4 more
doaj +1 more source
Scientific Reports, 2023 The first-year survival alters population growth rates and viability in birds, however this period remains the least-studied of the avian life stages. Here we present results of the 19 years of study of fledglings apparent survival of urban population of
Dariusz Wysocki +2 more
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A new approach to the “apparent survival” problem: estimating true survival rates from mark–recapture studies [PDF]
Ecology, 2012 Survival estimates generated from live capture–mark–recapture studies may be negatively biased due to the permanent emigration of marked individuals from the study area. In the absence of a robust analytical solution, researchers typically sidestep this problem by simply reporting estimates using the term “apparent survival.” Here, we present a ...
Gilroy, J.J. +3 more
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Age‐specific survival of reintroduced swift fox in Badlands National Park and surrounding lands
Wildlife Society Bulletin, 2016 In 2003, a reintroduction program was initiated at Badlands National Park (BNP), South Dakota, USA, with swift foxes (Vulpes velox) translocated from Colorado and Wyoming, USA, as part of a restoration effort to recover declining swift fox populations ...
Indrani Sasmal +3 more
doaj +1 more source
Variable age structure and apparent density dependence in survival of adult ungulates [PDF]
Journal of Animal Ecology, 2003 SummaryLarge herbivores have strongly age‐structured populations. Because recruitment often decreases as population density increases, in unexploited populations the proportion of older adults may increase with density. Because survival senescence is typical of ungulates, ignoring density‐dependent changes in age structure could lead to apparent ...
Festa-Bianchet, M. +2 more
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Collection of blood from wild‐caught mice (Peromyscus) via submandibular venipuncture
Wildlife Society Bulletin, 2017 ABSTRAC Submandibular venipuncture is a common technique used to harvest whole blood from laboratory‐strain mice, but its effectiveness on wild‐caught Peromyscus spp. has not been formally tested.
Jacob L. Berl +4 more
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Using local dispersal data to reduce bias in annual apparent survival and mate fidelity [PDF]
, 2015 Citation: Taylor, C. M., Lank, D. B., & Sandercock, B. K. (2015). Using local dispersal data to reduce bias in annual apparent survival and mate fidelity. Condor, 117(4), 598-608.
Lank, D. B. +2 more
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Journal of Avian Biology, 2023 Reliable estimates of adult survival for many shorebird species are lacking. We used Cormack–Jolly–Seber (CJS) methods to provide an estimate of apparent, or local, survival (φ) of a population of whimbrels, Numenius phaeopus, breeding in the subarctic ...
Anne N. M. A. Ausems +5 more
doaj +1 more source
Survival and dispersal of the Cyprus Wheatear Oenanthe cypriaca, an endemic migrant [PDF]
, 2016 Many populations of European migrant bird species are declining and this may be driven by survival rates but there are few studies that can estimate true survival rates. Cyprus Wheatears Oenanthe cypriaca are an endemic migrant that winter in East Africa:
Cresswell, Will, Xenophontos, Marina
core +1 more source