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Immunocompetence and condition-dependent sexual advertisement in male house sparrows (Passer domesticus)
Summary1. We tested the condition-dependent hypothesis of sexual advertisement in housesparrows (Passer domesticus). Male house sparrows have a bib of black featherswhich serves as both a badge ofExpand
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Extrapair paternity in relation to sexual ornamentation, arrival date, and condition in a migratory bird
We tested the novel hypothesis that arrival date in migratory birds represents a reliable indicator of male quality that can be used by females as a cue in extrapair mating decisions. SecondaryExpand
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Immunocompetence and nestling survival in the house martin : the tasty chick hypothesis
In altricial birds post-fledging survival is usually positively related to nestling body mass. A large number of studies have shown that the latest hatched chick is the more likely to die, even ifExpand
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Nest building is a sexually selected behaviour in the barn swallow
Females may use male nest building to assess male parental quality, and nest size would then be a sexually selected trait. In the barn swallow, Hirundo rustica, females select their partner by hisExpand
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  • Open Access
Testosterone and sexual signalling in male house sparrows (Passer domesticus)
Abstract. Female preference for mates with elaborated ornaments has often been explained on the basis that exaggerated secondary sexual traits might reflect individual quality and females mightExpand
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Dynamics of an immune response in house sparrows Passer domesticus in relation to time of day, body condition and blood parasite infection
in relation to time of day,body condition and blood parasite infection. – Oikos 101: 291–298.The T-cell mediated response to a challenge of the immune system with phytohemag-glutinin (PHA) is aExpand
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Malarial parasites decrease reproductive success: an experimental study in a passerine bird
Malarial parasites are supposed to have strong negative fitness consequences for their hosts, but relatively little evidence supports this claim due to the difficulty of experimentally testing this.Expand
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Genetic and environmental components of phenotypic variation in immune response and body size of a colonial bird, Delichon urbica (the house martin)
Directional selection for parasite resistance is often intense in highly social host species. Using a partial cross-fostering experiment we studied environmental and genetic variation in immuneExpand
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Sexual selection and tail streamers in the barn swallow
The functional significance of elongated, narrow tips of the tail feathers of certain birds, so–called tail streamers, has recently been discussed from an aerodynamic point of view, and the effectsExpand
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Antioxidants and condition‐dependence of arrival date in a migratory passerine
Early arrival at the breeding area after spring migration determines several fitness benefits to migratory birds, including an early start of reproduction and a greater seasonal reproductive success.Expand
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