Search Results - "Walther, B A"

Comparative performance of species richness estimation methods by Walther, B A, Morand, S

“…In most real-world contexts the sampling effort needed to attain an accurate estimate of total species richness is excessive. Therefore, methods to estimate…”
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Using potential distributions to explore determinants of Western Palaearctic migratory songbird species richness in sub-Saharan Africa by Wisz, M.S, Walther, B.A, Rahbek, C

“…Although the breeding ranges of most Western Palaearctic migratory passerines are well documented in Europe, their overwintering ranges and patterns of species…”
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Ecology. Toward a global biodiversity observing system by Scholes, R J, Mace, G M, Turner, W, Geller, G N, Jurgens, N, Larigauderie, A, Muchoney, D, Walther, B A, Mooney, H A

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Influence of host ecology and morphology on the diversity of Neotropical bird lice by Clayton, D. H., Walther, B. A.

“…Host-parasite systems can be powerful arenas in which to explore factors influencing community structure. We used a comparative approach to examine the…”
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The Effects of Food Availability and Distance to Protective Cover on the Winter Foraging Behaviour of Tits (Aves: Parus) by Walther, B. A., Gosler, A. G.

“…To maximize fitness, many animals must trade off their need to forage efficiently against their need to avoid predators. We studied such a trade-off in four…”
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Species richness estimation of bird communities: how to control for sampling effort? by WALTHER, BRUNO A., MARTIN, JEAN-LOUIS

“…Since estimates of total species richness increase with sampling effort, methods to control for this sampling effect need to be tested and used. We present…”
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Timing of transmission and the evolution of virulence of an insect virus by Cooper, V. S., Reiskind, M. H., Miller, J. A., Shelton, K. A., Walther, B. A., Elkinton, J. S., Ewald, P. W.

“…We used the nuclear polyhedrosis virus of the gypsy moth,…”
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Showiness of Neotropical Birds in Relation to Ectoparasite Abundance and Foraging Stratum by Walther, B. A., Clayton, D. H., Gregory, R. D.

“…The evolution of bird coloration has inspired many hypotheses. We report the results of comparative tests involving the interacting effects of microhabitat…”
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Sampling Effort and Parasite Species Richness by Walther, B.A., Cotgreave, P., Price, R.D., Gregory, R.D., Clayton, D.H.

“…Comparative studies of parasite species richness among host taxa can be confounded by uneven sampling effort. Sampling ceases to be a confounding factor when…”
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Dust-Ruffling: A Simple Method for Quantifying Ectoparasite Loads of Live Birds (Sacudidas de Polvo: Un Metodo Sencillo para Cuantificar las Cargas de Ectoparasitos en Aves Vivas) by Walther, B. A., Clayton, D. H.

“…We present a simple, accurate method for quantifying the ectoparasite loads of live birds in the field. Birds were dusted with pyrethrin to irritate their…”
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The concepts of bias, precision and accuracy, and their use in testing the performance of species richness estimators, with a literature review of estimator performance by Walther, Bruno A., Moore, Joslin L.

“…The purpose of this review is to clarify the concepts of bias, precision and accuracy as they are commonly defined in the biostatistical literature, with our…”
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Modelling the winter distribution of a rare and endangered migrant, the Aquatic Warbler Acrocephalus paludicola by WALTHER, BRUNO A, SCHÄFFER, NORBERT, VAN NIEKERK, ADRIAAN, THUILLER, WILFRIED, RAHBEK, CARSTEN, CHOWN, STEVEN L

“…The Aquatic Warbler Acrocephalus paludicola is one of the most threatened Western Palearctic passerine species, classified as globally Vulnerable. With its…”
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Toward a Global Biodiversity Observing System by Scholes, R. J., Mace, G. M., Turner, W., Geller, G. N., Jürgens, N., Larigauderie, A., Muchoney, D., Walther, B. A., Mooney, H. A.

“…Tracking biodiversity change is increasingly important in sustaining ecosystems and ultimately human well-being…”
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Pathogen survival in the external environment and the evolution of virulence by Walther, Bruno A., Ewald, Paul W.

“…Recent studies have provided evolutionary explanations for much of the variation in mortality among human infectious diseases. One gap in this knowledge…”
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The Convention on Biological Diversity's 2010 Target by Balmford, Andrew, Bennun, Leon, Brink, Ben ten, Cooper, David, Côté, Isabelle M., Crane, Peter, Dobson, Andrew, Dudley, Nigel, Dutton, Ian, Green, Rhys E., Gregory, Richard D., Harrison, Jeremy, Kennedy, Elizabeth T., Kremen, Claire, Leader-Williams, Nigel, Lovejoy, Thomas E., Mace, Georgina, May, Robert, Mayaux, Phillipe, Morling, Paul, Phillips, Joanna, Redford, Kent, Ricketts, Taylor H., Rodríguez, Jon Paul, Sanjayan, M., Schei, Peter J., van Jaarsveld, Albert S., Walther, Bruno A.

“…Balmford et al discusses the 2002 Johannesburg World Summit's target on biological diversity for 2010. By adopting the 2010 target, governments are explicitly…”
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The Catheter—How to Use and When Not to Use by Prentiss, R. J., Mullenix, R. B., Feeney, M. J., Howe, G. E., Steel, J. F., Cole, J. W., Flynn, V. J., Walther, A. B., Sorensen, M. B.

“…Catheterization should not be used without true indication. Careful control of hydration, sedation, anesthesia and use of anticholinergic agents before, during…”
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Elaborate ornaments are costly to maintain: evidence for high maintenance handicaps by Walther, Bruno A., Clayton, Dale H.

“…Elaborate secondary sexual traits, such as the ornamental plumage of birds, may be favored by female choice because they serve as honest indicators of male…”
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GROUNDED GROUND BIRDS AND SURFING CANOPY BIRDS: VARIATION OF FORAGING STRATUM BREADTH OBSERVED IN NEOTROPICAL FOREST BIRDS AND TESTED WITH SIMULATION MODELS USING BOUNDARY CONSTRAINTS by Walther, Bruno A

“…Vertical stratification of bird species has been intensively studied in temperate as well as tropical forest bird communities. One question that has received…”
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Vertical stratification and use of vegetation and light habitats by Neotropical forest birds by Walther, Bruno A

“…SummaryThe vertical stratification of bird species has been intensively studied in both temperate and tropical bird communities. I investigated the vertical…”
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Grounded Ground Birds And Surfing Canopy Birds: Variation Of Foraging Stratum Breadth Observed In Neotropical Forest Birds And Tested With Simulation Models Using Boundary Constraints by Walther, BA

“…Vertical stratification of bird species has been intensively studied in temperate as well as tropical forest bird communities. One question that has received…”
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