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Extra-pair paternity and intraspecific brood parasitism in wild zebra finches Taeniopygia guttata, revealed by DNA fingerprinting
TLDR
Behavioural observations show that EPP occurs through extra-pair copulation rather than rapid mate switching in a wild population of zebra finches, and is discussed in the light of what is known about the fertile period and sperm precedence patterns in this species.
A critique of avian CHD-based molecular sexing protocols illustrated by a Z-chromosome polymorphism detected in auklets
TLDR
The potential difficulties caused by a polymorphism such as that identified in auklets are discussed and the merits of alternative CHD -based sexing protocols and primers are discussed.
Experimental evidence for mutual inter- and intrasexual selection favouring a crested auklet ornament
TLDR
The idea that the crest ornament is favoured by both intra- and intersexual selection is supported by the finding that crest length was strongly correlated with dominance within both sexes.
Oil pollution and climate have wide-scale impacts on seabird demographics.
TLDR
It is shown that over-winter survival of adult common guillemots (Uria aalge) is negatively affected by both the incidence of four major oil-spills in their wintering grounds and high values of the North Atlantic Oscillation (NAO) index.
Mutual sexual selection in a monogamous seabird
TLDR
The results of a study of mate preferences of the crested auklet Aethla cristatella, a monogamous seabird in which both sexes are ornamented, confirm the idea that ornaments expressed in both sexes could be favoured by mutual mating preferences.
GENIC CAPTURE AND THE GENETIC BASIS OF SEXUALLY SELECTED TRAITS IN THE ZEBRA FINCH
TLDR
Using a captive population of the zebra finch Taeniopygia guttata, a genic capture hypothesis is tested that genetic variance exists in beak color which is a sexually selected trait, but also in condition and immune function, and positive genetic correlations exist between condition and beakcolor, and between beak Color, condition, and immunefunction.
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