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Females increase offspring heterozygosity and fitness through extra-pair matings
TLDR
It is shown that female blue tits, Parus caeruleus, increase the heterozygosity of their progeny through extra-pair matings, and the cost of inbreeding may be an important factor driving the evolution of female extra- Pair mating. Expand
DNA barcoding of Scandinavian birds reveals divergent lineages in trans-Atlantic species
TLDR
This study demonstrates the effectiveness of COI barcodes for identifying Scandinavian birds and highlights taxa for taxonomic review. Expand
Carotenoids in food chain studies—II. The food chain of Parus SPP. Monitored by carotenoid analysis☆
TLDR
No metabolic structural modifications of the carotenoids of the primary producer occur during this food chain in nestling great tits living in deciduous or spruce forest. Expand
Polygyny in Birds: The Role of Competition between Females for Male Parental Care
TLDR
A modified version of the polygyny threshold model that takes female aggression into account is presented and shows that secondary females generally have a reduced reproductive success compared with simultaneous, monogamous females. Expand
New frog family from India reveals an ancient biogeographical link with the Seychelles
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Female bluethroats enhance offspring immunocompetence through extra-pair copulations
TLDR
It is reported that nestling bluethroats sired by extra-pair males had a higher T-cell-mediated immune response than their maternal half-siblings raised in the same nest, which indicates an additional effect of maternal genotype. Expand
Extra-pair paternity in monogamous tree swallows
TLDR
There was no relationship between the pair copulation rate and the proportion of illegitimate young in a brood, suggesting that males cannot use the number of copulations performed with their mate as a reliable cue to their share of paternity. Expand
Sex differences in Little Auk Alle alle parental care: transition from biparental to paternal-only care
TLDR
Examination of Little Auk Alle alle parental care at a breeding colony during the chick-rearing and fledging periods found chick mass loss prior to fledging was associated with the lack of provisioning by the female parent, rather than a reduction in feeding frequency by both parents. Expand
Intraspecific Variation in Sperm Length is Negatively Related to Sperm Competition in Passerine Birds
TLDR
It is demonstrated, by using phylogenetic comparative methods, that between-male variation in sperm length within species is closely and negatively linked to the risk of sperm competition, and this relationship was even stronger when only considering species in which data on sperm length and extrapair paternity originated from the same populations. Expand
Genetic relationships in the peregrine falcon (Falco peregrinus) analysed by microsatellite DNA markers
TLDR
Cross‐species amplifications showed that most loci also appeared to amplify polymorphic products in the gyrfalcon and kestrel, demonstrating that the loci will provide powerful genetic markers in these falcons too. Expand
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