Claudia Bieber

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Human activities and weather drive contact rates of wintering elk

William M. Janousek, Tabitha A. Graves, Ethan E. Berman, Geneva W. Chong, more

Journal of Applied Ecology > 58 > 3 > 667 - 676

Wildlife aggregation patterns can influence disease transmission. However, limited research evaluates the influence of anthropogenic and natural factors on aggregation. Many managers would like to reduce wildlife contact rates, driven by aggregation, to limit disease transmission. We develop a novel analytical framework to quantify how management activities such as supplemental feeding and hunting...

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Towards the validation of endogenous steroid testing in wildlife hair

Lee Koren, Heather Bryan, Devorah Matas, Simon Tinman, more

Journal of Applied Ecology > 56 > 3 > 547 - 561

Hair analysis is emerging as a popular tool to examine stress and reproduction hormone levels in wild mammals. The reliability of this approach, however, depends on an understanding of steroid hormone incorporation into hair as well as appropriate validations. We reviewed studies that have examined steroid hormones in wildlife hair with the goal of summarizing the analytical, physiological, and...

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Reliable methods for identifying animal deaths in GPS‐ and satellite‐tracking data: Review, testing, and calibration

Fabrizio Sergio, Alessandro Tanferna, Julio Blas, Guillermo Blanco, more

Journal of Applied Ecology > 56 > 3 > 562 - 572

Assessing mortality factors and survival rates is a cornerstone for the management of threatened and harvestable species. Modern tracking technologies allow unprecedented opportunities to monitor the mortality of individuals for years. However, the methods employed to separate actual deaths from transmitter failures have rarely been validated. Here, we review these previous methods and exploit...

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Multiple paternity in a population of free-living edible dormice (Glis glis)

Katharina Weber, Franz Hoelzl, Jessica S. Cornils, Steve Smith, more

Mammalian Biology > 2018 > 93 > 1 > 45-50

The mating system represents one key element of a species’ life history. Although some life history traits of the edible dormouse (Glis glis) have been investigated thoroughly, little information is available about the mating system of this arboreal, nocturnal, hibernating rodent. Molecular studies have suggested that polygynandry and high prevalence of multiple sired litters are typical among small...

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Human development and climate affect hibernation in a large carnivore with implications for human–carnivore conflicts

Heather E. Johnson, David L. Lewis, Tana L. Verzuh, Cody F. Wallace, more

Journal of Applied Ecology > 55 > 2 > 663 - 672

Expanding human development and climate change are dramatically altering habitat conditions for wildlife. While the initial response of wildlife to changing environmental conditions is typically a shift in behaviour, little is known about the effects of these stressors on hibernation behaviour, an important life‐history trait that can subsequently affect animal physiology, demography, interspecific...

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A prioritised list of invasive alien species to assist the effective implementation of EU legislation

Carles Carboneras, Piero Genovesi, Montserrat Vilà, Tim M. Blackburn, more

Journal of Applied Ecology > 55 > 2 > 539 - 547

Effective prevention and control of invasive species generally relies on a comprehensive, coherent and representative list of species that enables resources to be used optimally. European Union (EU) Regulation 1143/2014 on invasive alien species (IAS) aims to control or eradicate priority species, and to manage pathways to prevent the introduction and establishment of new IAS; it applies to species...

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Edible dormice (Glis glis) avoid areas with a high density of their preferred food plant - the European beech

Jessica S. Cornils, Franz Hoelzl, Birgit Rotter, Claudia Bieber, more

Frontiers in Zoology > 2017 > 14 > 1 > 1-10

Background Numerous species, especially among rodents, are strongly affected by the availability of pulsed resources. The intermittent production of large seed crops in northern hemisphere tree species (e.g., beech Fagus spec.,oak Quercus spec., pine trees Pinus spec.) are prime examples of these resource pulses. Adult edible dormice are highly dependent on high energy seeds to maximize their reproductive...

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The costs of locomotor activity? Maximum body temperatures and the use of torpor during the active season in edible dormice

Claudia Bieber, Jessica S. Cornils, Franz Hoelzl, Sylvain Giroud, more

Journal of Comparative Physiology B > 2017 > 187 > 5-6 > 803-814

Measuring T_b during the active season can provide information about the timing of reproduction and the use of short bouts of torpor and may be used as a proxy for the locomotor activity of animals (i.e., maximum T_b). This kind of information is especially important to understand life-history strategies and energetic costs and demands in hibernating mammals. We investigated T_b throughout the active...

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Cost and feasibility of a barrier to halt the spread of invasive cane toads in arid Australia: incorporating expert knowledge into model‐based decision‐making

Darren Southwell, Reid Tingley, Michael Bode, Emily Nicholson, more

Journal of Applied Ecology > 54 > 1 > 216 - 224

Active engagement with practitioners is a crucial component of model‐based decision‐making in conservation management; it can assist with data acquisition, improve models and help narrow the ‘knowing–doing’ gap. We worked with practitioners of one of the worst invasive species in Australia, the cane toad Rhinella marina, to revise a model that estimates the effectiveness of landscape barriers...

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Differences in growth rates and pre-hibernation body mass gain between early and late-born juvenile garden dormice

Stefan Stumpfel, Claudia Bieber, Stéphane Blanc, Thomas Ruf, more

Journal of Comparative Physiology B > 2017 > 187 > 1 > 253-263

Juvenile hibernators have to allocate energy to both growth and fattening, to survive winter, and to avoid possible disadvantages during their first reproductive season. Being born late in the active season may have important effects on growth and fattening. This study aimed at determining potential differences in rates and maximal level of growth, and in pre-hibernation body fat mass between early...

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Patterns of mammalian population decline inform conservation action

Martina M. I. Di Fonzo, Ben Collen, Aliénor L. M. Chauvenet, Georgina M. Mace, more

Journal of Applied Ecology > 53 > 4 > 1046 - 1054

Evaluations of wildlife population dynamics have the potential to convey valuable information on the type of pressure affecting a population and could help predict future changes in the population's trajectory. Greater understanding of different patterns of population declines could provide a useful mechanism for assessing decline severity in the wild and identifying those populations that are more...

article

Using dynamic occupancy models to inform climate change adaptation strategies for California spotted owls

Gavin M. Jones, Ralph J. Gutiérrez, Douglas J. Tempel, Benjamin Zuckerberg, more

Journal of Applied Ecology > 53 > 3 > 895 - 905

Management strategies intended to reduce the impacts of future climate change on montane species ought to consider fine‐scale variation in microclimate (e.g. because of topography) and vegetation conditions that create climate refugia. Identifying potential refugia and quantifying their importance is facilitated by analytical approaches that explicitly model associations between dynamic population...

article

Shy is sometimes better: personality and juvenile body mass affect adult reproductive success in wild boars, Sus scrofa

Sebastian G. Vetter, Constanze Brandstätter, Marie Macheiner, Franz Suchentrunk, more

Animal Behaviour > 2016 > 115 > C > 193-205

There is increasing evidence that animal personalities are linked to different life history strategies. However, studies examining whether these effects differ under varying environmental conditions are rare. Here, we investigated how animal personality affects reproductive success in a pulsed resource consumer, the wild boar. We determined the exploratory behaviour of 57 female wild boars in nine...

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Resolving patterns of population genetic and phylogeographic structure to inform control and eradication initiatives for brown rats Rattus norvegicus on South Georgia

Stuart B. Piertney, Andy Black, Laura Watt, Darren Christie, more

Journal of Applied Ecology > 53 > 2 > 332 - 339

The control and eradication of invasive species is a common management strategy to protect or restore native biodiversity. On South Georgia in the Southern Ocean, the brown rat Rattus norvegicus was brought onto the island with the onset of whaling and sealing activity in the 1800s and has had a significant detrimental impact on key bird species of conservation concern. Efforts to eradicate rats...

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How to spend the summer? Free-living dormice (Glis glis) can hibernate for 11 months in non-reproductive years

Franz Hoelzl, Claudia Bieber, Jessica S. Cornils, Hanno Gerritsmann, more

Journal of Comparative Physiology B > 2015 > 185 > 8 > 931-939

Edible dormice are arboreal rodents adapted to yearly fluctuations in seed production of European beech, a major food source for this species. In years of low beech seed abundance, dormice skip reproduction and non-reproductive dormice fed ad libitum in captivity can display summer dormancy in addition to winter hibernation. To test whether summer dormancy, that is, a very early onset of hibernation,...

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Body mass dependent use of hibernation: why not prolong the active season, if they can?

Claudia Bieber, Karin Lebl, Gabrielle Stalder, Fritz Geiser, more

Functional Ecology > 28 > 1 > 167 - 177

Hibernation is the most effective means for energy conservation during winter in mammals. The drawbacks of deep and prolonged torpor include reduced immunocompetence, and consequently, hibernators should be selected to minimize torpor expression when climatic conditions or energy availability (e.g. food or fat stores) permit. Therefore, it seems surprising that some hibernators employ extraordinary...

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Survival rates in a small hibernator, the edible dormouse: a comparison across Europe

Karin Lebl, Claudia Bieber, Peter Adamík, Joanna Fietz, more

Ecography > 34 > 4 > 683 - 692

Understanding how local environmental factors lead to temporal variability of vital rates and to plasticity of life history tactics is one of the central questions in population ecology. We used long‐term capture‐recapture data from five populations of a small hibernating rodent, the edible dormouse Glis glis, collected over a large geographical range across Europe, to determine and analyze both seasonal...

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High survival during hibernation affects onset and timing of reproduction

Claudia Bieber, Rimvydas Juškaitis, Christopher Turbill, Thomas Ruf

Oecologia > 2012 > 169 > 1 > 155-166

The timing of reproduction is one of the most crucial life history traits, with enormous consequences for the fitness of an individual. We investigated the effects of season and timing of birth on local survival probability in a small mammalian hibernator, the common dormouse (Muscardinus avellanarius). Local monthly survival probability was lowest in the early active season (May–August, ϕ_adult = 0...

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Seasonal changes in liver size in edible dormice (Glis glis): non-invasive measurements using ultrasonography

Claudia Bieber, Katharina Außerlechner, Christiane Skerget, Christian Walzer, more

European Journal of Wildlife Research > 2011 > 57 > 3 > 657-662

We used non-invasive ultrasonography to investigate seasonal changes in liver size of an obligate hibernator; the edible dormouse (Glis glis). We repeatedly measured liver size in dormice at two study sites, (1) an enclosure-housed colony and (2) a free-ranging population. We observed a significant increase in transverse liver size throughout the active season; however, this effect was most pronounced...

article

Energy or information? The role of seed availability for reproductive decisions in edible dormice

Karin Lebl, Klaus Kürbisch, Claudia Bieber, Thomas Ruf

Journal of Comparative Physiology B > 2010 > 180 > 3 > 447-456

The edible dormouse is a specialized seed predator which is highly adapted to the fluctuations of food availability caused by mast seeding of beech and oak trees. Dormice produce young just in time with maximum food availability, and can completely skip reproduction in years with a lack of seeding. Because their decision to reproduce or not in any particular year is made long before the ripe seeds...

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Search results for: Claudia Bieber

Human activities and weather drive contact rates of wintering elk

Towards the validation of endogenous steroid testing in wildlife hair

Reliable methods for identifying animal deaths in GPS‐ and satellite‐tracking data: Review, testing, and calibration

Multiple paternity in a population of free-living edible dormice (Glis glis)

Human development and climate affect hibernation in a large carnivore with implications for human–carnivore conflicts

A prioritised list of invasive alien species to assist the effective implementation of EU legislation

Edible dormice (Glis glis) avoid areas with a high density of their preferred food plant - the European beech

The costs of locomotor activity? Maximum body temperatures and the use of torpor during the active season in edible dormice

Cost and feasibility of a barrier to halt the spread of invasive cane toads in arid Australia: incorporating expert knowledge into model‐based decision‐making

Differences in growth rates and pre-hibernation body mass gain between early and late-born juvenile garden dormice

Patterns of mammalian population decline inform conservation action

Using dynamic occupancy models to inform climate change adaptation strategies for California spotted owls

Shy is sometimes better: personality and juvenile body mass affect adult reproductive success in wild boars, Sus scrofa

Resolving patterns of population genetic and phylogeographic structure to inform control and eradication initiatives for brown rats Rattus norvegicus on South Georgia

How to spend the summer? Free-living dormice (Glis glis) can hibernate for 11 months in non-reproductive years

Body mass dependent use of hibernation: why not prolong the active season, if they can?

Survival rates in a small hibernator, the edible dormouse: a comparison across Europe

High survival during hibernation affects onset and timing of reproduction

Seasonal changes in liver size in edible dormice (Glis glis): non-invasive measurements using ultrasonography

Energy or information? The role of seed availability for reproductive decisions in edible dormice

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