Výsledky vyhledávání - "Mark S. Witter"

Monitoring trends in bat populations through roost surveys: methods and data from Rhinolophus hipposideros

Publikováno v: Biological Conservation. 105:255-261

Volunteers counted lesser horseshoe bats ( Rhinolophus hipposideros) emerging from 79 roosts throughout Wales prior to parturition over a 5-year period. Analysis of the count data and environmental variables revealed that there was no statistically s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::013e13451876e6412d3241a7256e2fc2
https://doi.org/10.1016/s0006-3207(01)00209-9

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Cluttered habitats reduce wing asymmetry and increase flight performance in European starlings

Autor: John P. Swaddle, Mark S. Witter

Publikováno v: Behavioral Ecology and Sociobiology. 42:281-287

Fluctuating asymmetry is a measure of developmental instability and results from both genomic and environmental influences. Levels of asymmetry are (in part) influenced by mechanical constraints, as asymmetry is believed to reduce efficiency. Here we

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bab12aabe9f2b521d7ce7b8ddc7f971c
https://doi.org/10.1007/s002650050440

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Feeding interruptions, diurnal mass changes and daily routines of behaviour in the zebra finch

Autor: Sasha R. X. Dall, Mark S Witter

Publikováno v: Animal Behaviour. 55:715-725

We investigated daily changes in body mass, fat reserves and crop contents, and diurnal organization of behaviour, in the zebra finch, Taeniopygia guttata, in relation to experimental manipulations of food availability. Diurnal mass change and the or

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca3fd3a3f762b140a8ed5e10ab10193e
https://doi.org/10.1006/anbe.1997.0749

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Social stimulation and regulation of body mass in female starlings

Autor: Mark S Witter, Arthur R. Goldsmith

Publikováno v: Animal Behaviour. 54:279-287

The influence of consexual social stimulation on the regulation of body mass in female European starlings, Sturnus vulgaris during reproductive development was examined. Twenty-four pairs of birds were housed in three social stimulation treatments: (

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5aca4c418726dfcd3d28bac9f248bc5
https://doi.org/10.1006/anbe.1996.0443

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The effects of molt on the flight performance, body mass, and behavior of European starlings (Sturnus vulgaris): an experimental approach

Autor: John P. Swaddle, Mark S. Witter

Publikováno v: Canadian Journal of Zoology. 75:1135-1146

The physiological and energy costs of avian molt are well documented, but indirect consequences such as changes in flight performance have received less attention. Here, we report two experiments that investigated flight performance, body mass regula

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::17c0025d1dca402b0008a5ab22af5b1c
https://doi.org/10.1139/z97-136

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Habitat structure, stress and plumage development

Autor: Sonia J. Lee, Mark S. Witter

Publikováno v: Proceedings of the Royal Society of London. Series B: Biological Sciences. 261:303-308

Past studies have demonstrated that birds’ perceived risk of predation is influenced by habitat structure, notably the availability of a refuge and the location of food. Thus apparently dangerous habitats, such as those without a refuge, may act as

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::de6cadb2dc2de78c5983cd40fc52bdb7
https://doi.org/10.1098/rspb.1995.0151

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Chest plumage, dominance and fluctuating asymmetry in female starlings

Autor: Mark S. Witter, John P. Swaddle

Publikováno v: Proceedings of the Royal Society of London. Series B: Biological Sciences. 260:219-223

It has been proposed that levels of fluctuating asymmetry (FA) may be used in establishing and maintaining dominance hierarchies, as asymmetry reflects aspects of individual quality. However, previous manipulations of FA have failed to reveal that th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::04475184fc773287600885be898280a3
https://doi.org/10.1098/rspb.1995.0083

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