Search Results - "HASSELQUIST, D"

Hidden costs of infection: Chronic malaria accelerates telomere degradation and senescence in wild birds by Asghar, M., Hasselquist, D., Hansson, B., Zehtindjiev, P., Westerdahl, H., Bensch, S.

“…Recovery from infection is not always complete, and mild chronic infection may persist. Although the direct costs of such infections are apparently small, the…”
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Multivariate phenotypes and the potential for alternative phenotypic optima in wall lizard (Podarcis muralis) ventral colour morphs by CALSBEEK, B, HASSELQUIST, D, CLOBERT, J

“…A major goal in evolutionary biology is to determine how phenotypic variation arises and is maintained in natural populations. Recent studies examining the…”
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A New Nested Polymerase Chain Reaction Method Very Efficient in Detecting Plasmodium and Haemoproteus Infections From Avian Blood by Waldenström, J, Bensch, S, Hasselquist, D, Östman, Ö

“…Recently, several polymerase chain reaction (PCR)–based methods for detection and genetic identification of haemosporidian parasites in avian blood have been…”
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Selection and evolutionary potential of spring arrival phenology in males and females of a migratory songbird by Tarka, M, Hansson, B, Hasselquist, D

“…The timing of annual life‐history events affects survival and reproduction of all organisms. A changing environment can perturb phenological adaptations and an…”
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evolution of highly variable immunity genes across a passerine bird radiation by O'Connor, E. A, Strandh, M, Hasselquist, D, Nilsson, J.‐Å, Westerdahl, H

“…To survive, individuals must be able to recognize and eliminate pathogens. The genes of the major histocompatibility complex (MHC) play an essential role in…”
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Cross-species infection of blood parasites between resident and migratory songbirds in Africa by Waldenström, J., Bensch, S., Kiboi, S., Hasselquist, D., Ottosson, U.

“…We studied the phylogeny of avian haemosporidian parasites, Haemoproteus and Plasmodium, in a number of African resident and European migratory songbird…”
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Evidence of a neo-sex chromosome in birds by Pala, I, Naurin, S, Stervander, M, Hasselquist, D, Bensch, S, Hansson, B

“…Neo-sex chromosomes often originate from sex chromosome-autosome fusions and constitute an important basis for the study of gene degeneration and expression in…”
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Parental care and adaptive brood sex ratio manipulation in birds by Hasselquist, D., Kempenaers, B.

“…Under many circumstances, it might be adaptive for parents to bias the investment in offspring in relation to sex. Recently developed molecular techniques that…”
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Circannual variation in blood parasitism in a sub‐Saharan migrant passerine bird, the garden warbler by Hellgren, O., Wood, M. J., Waldenström, J., Hasselquist, D., Ottosson, U., Stervander, M., Bensch, S.

“…Knowing the natural dynamics of pathogens in migratory birds is important, for example, to understand the factors that influence the transport of pathogens to…”
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Host specificity in avian blood parasites: a study of Plasmodium and Haemoproteus mitochondrial DNA amplified from birds by Bensch, Stffan, Stjernman, Martin, Hasselquist, Dennis, Örjan, Östman, Hannson, Bengt, Westerdahl, Helena, Pinheiro, Renato Torres

“…or…”
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Determinants of distribution and prevalence of avian malaria in blue tit populations across Europe: separating host and parasite effects by SZÖLLŐSI, E., CICHOŃ, M., EENS, M., HASSELQUIST, D., KEMPENAERS, B., MERINO, S., NILSSON, J.‐Å., ROSIVALL, B., RYTKÖNEN, S., TÖRÖK, J., WOOD, M. J., GARAMSZEGI, L. Z.

“…Although avian malarial parasites are globally distributed, the factors that affect the geographical distribution and local prevalence of different parasite…”
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The cost of an immune response: vaccination reduces parental effort by Råberg, L., Nilsson, J.-Å., Ilmonen, P., Stjernman, M., Hasselquist, D.

“…A fundamental assumption of theories of the ecology and evolution of inducible defences is that protective responses to attacks by parasites or predators…”
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On the adaptive significance of stress-induced immunosuppression by Råberg, Lars, Grahn, Mats, Hasselquist, Dennis, Svensson, Erik

“…We approach the field of stress immunology from an ecological point of view and ask: why should a heavy physical workload, for example as a result of a high…”
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Energetic Stress, Immunosuppression and the Costs of an Antibody Response by Svensson, E., Raberg, L., Koch, C., Hasselquist, D.

“…1. Recently, there has been much interest in physiological trade-offs between parasite resistance and fitness-related traits such as secondary sexual…”
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Between‐year variation of MHC allele frequencies in great reed warblers: selection or drift? by Westerdahl, H., Hansson, B., Bensch, S., Hasselquist, D.

“…The major histocompatibility complex (MHC) genes are extremely polymorphic and this variation is assumed to be maintained by balancing selection. Cyclic…”
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Species diversity of campylobacteria in a wild bird community in Sweden by Waldenström, J, On, S.L.W, Ottvall, R, Hasselquist, D, Olsen, B

“…To analyse the occurrence and host species distribution of campylobacteria species in shorebirds, geese and cattle on grazed coastal meadows in Sweden. Species…”
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Nestling growth and song repertoire size in great reed warblers: evidence for song learning as an indicator mechanism in mate choice by Nowicki, Stephen, Hasselquist, Dennis, Bensch, Staffan, Peters, Susan

“…Acrocephalus arundinaceus…”
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Heritability of dispersal in the great reed warbler by Hansson, B., Bensch, S., Hasselquist, D.

“…Dispersal is commonly considered to be a condition‐dependent behaviour with no or low heritability. Here, we show that dispersal in the great reed warbler…”
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Microsatellite diversity predicts recruitment of sibling great reed warblers by Hansson, Bengt, Bensch, Staffan, Hasselquist, Dennis, Åkesson, Mikael

“…), than their non–recruited siblings. These relationships suggest that the microsatellite markers, which are generally assumed to be neutral, cosegregated with…”
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Do female great reed warblers seek extra–pair fertilizations to avoid inbreeding? by Hansson, B., Hasselquist, D., Bensch, S.

“…Acrocephalus arundinaceus…”
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