Blue-green and brown-spotted eggshells in birds have been proposed as sexual signals of female physiological condition and egg quality, reflecting maternal investment in the egg. Testing this hypothesis requires linking eggshell coloration to egg content, which is lacking for brown protoporphyrin-based pigmentation. As protoporphyrins can induce oxidative stress, and a large amount in eggshells should indicate either high female and egg quality if it reflects the female's high oxidative tolerance, or conversely poor quality if it reflects female physiological stress. Different studies supported either predictions but are difficult to compare given the methodological differences in eggshell-spottiness measurements. Using the blue tit Cyanist...
Recent work suggests that the evolution of egg coloration may have been constrained in three importa...
A relationship has been suggested between eggshell colour and female body condition based on the opp...
The striking diversity of avian eggshell colour has long fascinated biologists. Recently, it has bee...
Blue-green and brown-spotted eggshells in birds have been proposed as sexual signals of female physi...
Protoporphyrin pigment causes the red-brown eggshell colors; however, for many species, the function...
The colourful appearance of avian eggshells is a prominent aspect of maternal reproductive effort in...
Eggshell coloration in bird clutches shows a striking variability within species which has not yet b...
Avian eggs exhibit a large variability in coloration and patterns, which are produced by blue-green ...
Biologists have long puzzled over the apparent conspicuousness of blue-green eggshell coloration in ...
Abstract: Avian eggshell pigmentation may provide information about a female’s physiological conditi...
Among the most eye-catching traits of avian eggs are their background coloration and pigmentation, c...
Bird´s Eggs Are Specific for Big Variability in Eggshell Coloration. This Eggshell Eoloration Is Cau...
Reproduction is a critical period for birds as they have to cope with many stressful events. One con...
<div><p>Reproduction is a critical period for birds as they have to cope with many stressful events....
Egg camouflage may explain the adaptive significance of avian eggshell pigmentation in ground-nestin...
Recent work suggests that the evolution of egg coloration may have been constrained in three importa...
A relationship has been suggested between eggshell colour and female body condition based on the opp...
The striking diversity of avian eggshell colour has long fascinated biologists. Recently, it has bee...
Blue-green and brown-spotted eggshells in birds have been proposed as sexual signals of female physi...
Protoporphyrin pigment causes the red-brown eggshell colors; however, for many species, the function...
The colourful appearance of avian eggshells is a prominent aspect of maternal reproductive effort in...
Eggshell coloration in bird clutches shows a striking variability within species which has not yet b...
Avian eggs exhibit a large variability in coloration and patterns, which are produced by blue-green ...
Biologists have long puzzled over the apparent conspicuousness of blue-green eggshell coloration in ...
Abstract: Avian eggshell pigmentation may provide information about a female’s physiological conditi...
Among the most eye-catching traits of avian eggs are their background coloration and pigmentation, c...
Bird´s Eggs Are Specific for Big Variability in Eggshell Coloration. This Eggshell Eoloration Is Cau...
Reproduction is a critical period for birds as they have to cope with many stressful events. One con...
<div><p>Reproduction is a critical period for birds as they have to cope with many stressful events....
Egg camouflage may explain the adaptive significance of avian eggshell pigmentation in ground-nestin...
Recent work suggests that the evolution of egg coloration may have been constrained in three importa...
A relationship has been suggested between eggshell colour and female body condition based on the opp...
The striking diversity of avian eggshell colour has long fascinated biologists. Recently, it has bee...