The Effects of Provision of Food in Winter on a Population of the Great Tit Parus major and the Blue Tit P. caeruleus

Källander, Hans

doi:10.2307/3676087

Cited by 54 publications

(48 citation statements)

References 4 publications

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“…7,10,[21][22][23][24][25][26] Not surprisingly, these factors influence the number of birds that actually enter gardens.'' Some of the regional and seasonal effects that we have described above may have been mediated by these factors but we cannot tell, because we neither measured them nor have data for more than 1 year.…”

Section: Discussionmentioning

confidence: 99%

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Birds in European gardens in the winter and spring of 1988–89

Thompson

Greenwood

Greenaway³

1993

Bird Study

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Section: Discussionmentioning

confidence: 99%

“…[5][6][7][8][9][10][11] Furthermore, the effects of severe winter weather seem least marked in those species that make most use of artificial food. [12][13][14] However, little is known about the frequency of occurrence or abundance of birds in continental European gardens, or about the importance of such gardens for birds.…”

mentioning

confidence: 99%

Birds in European gardens in the winter and spring of 1988–89

Thompson

Greenwood

Greenaway³

1993

Bird Study

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“…Energetic constraints and cold stress can drive reductions in body condition and impose carry-over costs on subsequent survival and reproduction [20][21][22][23][24]. Winter may therefore impose negative longer-term costs on future fitness via carry-over effects on body condition (e.g.…”

Section: Introductionmentioning

confidence: 99%

Associations between changing climate and body condition over decades in two southern hemisphere passerine birds

Gardner

Rowley

Rebeira³

et al. 2018

Clim Chang Responses

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Background: Climate change presents considerable challenges for endotherms because they must maintain high, relatively constant body temperatures across a range of environmental conditions to ensure survival and optimise performance. Individuals exposed to changing weather must manage energy and water allocation to maintain thermal homeostasis, with consequences for body condition, and hence there is potential for selection because body condition is strongly linked to fitness. Understanding how weather drives changes in body condition is therefore fundamental to understanding how fitness is affected by climate change. Here we test for associations between weather and body condition and how this changes over time, in two co-existing species of small insectivorous passerines, the red-winged fairy-wren, Malurus elegans and white-browed scrubwren, Sericornis frontalis, that have been the subject of a ringing study for 39 years in temperate south-western Australia. The study populations have experienced increases in minimum temperatures in winter and summer as well as decreases in the frequencies of days with thermal minima < 5°C, but the summer climate remains relatively mild with few days experiencing thermal maxima > 35°C. Although, warming temperatures may reduce thermoregulatory costs, repeated exposure to hot conditions has been shown to have negative effects on body condition. Thus, we predict that the reduction over time in daily minima < 5°C, along with the influence of increased maximum and minimum temperatures in summer and winter, will have positive effects on body condition. Results: In accordance with thermoregulatory predictions, colder daily minima in the range 1-19°C prior to capture were associated with reduced body condition in winter in both species. Furthermore, in summer, in fairy-wrens but not scrubwrens, warmer daily maxima were associated with increasing body condition, and repeated exposure to temperatures > 30°C over consecutive days was negatively associated with body condition. Body condition increased over the 39 years of the study for fairy-wrens but there was no change in scrubwrens, which is consistent with observed within-season associations between body condition and weather, and the change in climate over time.

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“…Studies in several parid species have shown enhanced overwinter survival on food-supplemented sites (Jansson et al 1981, Källander 1981, Brittingham and Temple 1988, Doherty and Grubb 2002. Food resources may be particularly important during a limited number of harsh winter days, so perhaps having access to feeders at these critical times improved survival of subordinate birds.…”

Section: Year-dependentmentioning

confidence: 99%

BETWEEN-YEAR SURVIVAL AND RANK TRANSITIONS IN MALE BLACK-CAPPED CHICKADEES (POECILE ATRICAPILLUS): A MULTISTATE MODELING APPROACH

Schubert

Mennill

Ramsay

et al. 2008

The Auk

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Abstract.-In dominance-structured animal societies, variation in individual fitness is often related to social status. Like many passerine birds, Black-capped Chickadees (Poecile atricapillus) have a short average adult life-expectancy (~2 years); however, the maximum recorded life span is >5× as long. Enhanced annual survival could contribute to greater lifetime reproductive success for male Black-capped Chickadees with high social rank. We used multistate capture-mark-recapture models to estimate annual survival of male Black-capped Chickadees in Ontario using resighting and recapture data collected from 1997 to 2002. Our goal was to evaluate support for an influence of rank on annual survival and estimate its effect size for a food-supplemented study site. We also statistically modeled the probability of between-year rank transitions. Model selection based on Akaike's information criterion provided support for an effect of rank on survival. However, multimodel inference revealed that the size of the effect was rather small. Over the six study years, model-averaged estimates of the survival benefit of high versus low rank ranged from 5.0 to 7.3%. As expected, survival was strongly year-dependent, with model-averaged estimates of annual survival probability varying between 0.36 and 0.73. Age was an important predictor of the probability of rank transitions. Low-ranked second-year birds were less likely than older low-ranked birds to advance to high rank between years; likewise, high-ranked after-second-year birds were less likely to drop in rank. Other studies have found larger effects of rank on survival than we observed here. Future research should consider how interactions between social and environmental factors influence annual survival. Key words: age-specific mortality, Black-capped Chickadee, capture-mark-recapture models, Paridae, Poecile atricapillus, rank acquisition, social dominance. Survie interannuelle et transitions de rang chez les Poecile atricapillus mâles : une méthodologie de modélisation à états multiplesRésumé.-Dans les sociétés animales structurées sur la dominance, la variation du fitness individuel est souvent liée au statut social. Comme plusieurs passereaux, Poecile atricapillus a une courte espérance de vie adulte moyenne (~2 ans). Toutefois, la durée de vie maximale enregistrée est >5× plus longue. Une survie annuelle accrue pourrait contribuer à un succès reproducteur à vie supérieur pour les mâles de haut rang social. Nous avons utilisé des modèles de capture-marquage-recapture à états multiples afin d'estimer la survie annuelle de P. atricapillus mâles en Ontario en utilisant des données de ré-observation et de recapture récoltées entre 1997 et 2002. Notre objectif était d'évaluer l'influence du rang sur la survie annuelle et d'estimer la taille d'effet sur un site d'étude de nourrissage. Nous avons aussi modelé statistiquement la probabilité des transitions de rang entre les années. La sélection des modèles basée sur le critère d'information d'Akaike a supporté l'hypothèse d'un...

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The Effects of Provision of Food in Winter on a Population of the Great Tit Parus major and the Blue Tit P. caeruleus

Cited by 54 publications

References 4 publications

Birds in European gardens in the winter and spring of 1988–89

Birds in European gardens in the winter and spring of 1988–89

Associations between changing climate and body condition over decades in two southern hemisphere passerine birds

BETWEEN-YEAR SURVIVAL AND RANK TRANSITIONS IN MALE BLACK-CAPPED CHICKADEES (POECILE ATRICAPILLUS): A MULTISTATE MODELING APPROACH

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