Evidence for the signaling function of egg color in the pied flycatcher Ficedula hypoleuca

Moreno, Juan; Morales, Judith; Lobato, Elisa; Merino, Santiago; Tomás, Gustavo; Puente, Josué Martínez‐de la

doi:10.1093/beheco/ari072

Cited by 104 publications

(137 citation statements)

References 37 publications

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“…Egg weight and eggshell colour are two physical factors that influence hatchability. Their effects on hatchability have been studied for hens (1,31,34,37), wild birds (25,26) and pheasants (4,14,21,22).…”

Section: Introductionmentioning

confidence: 99%

Effect of egg weight and amount of protoporphyrin and biliverdin in the egg shell on hatching characteristics and embryonal mortality in pheasants (Phasianus Colchicus)

DAŞ

2017

Ankara Üniversitesi Veteriner Fakültesi Dergisi

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Summary:This study was performed to investigate the effects of egg weight and amount of protoporphyrin and biliverdin in the eggshell on hatchability and embryonic mortality in pheasants. A total of 1908 eggs obtained from 48 weeks old pheasants were used in the study. The eggs were divided into three colour groups (dark brown, light brown and green) and two weight groups (up to 32 g and above 32 g). For the weight groups, there were significant differences in the hatchability of fertile eggs (P<0.01) and late period embryonic mortality (LPEM) (P<0.05). The highest hatchability of fertile eggs and the lowest embryonic mortality were determined in light eggs (≤32 g). In terms of eggshell colour groups, there were significant differences in the hatchability of total eggs (P<0.01); hatchability of fertile eggs (P<0.01); and early (P<0.01), middle (MPEM) (P<0.05) and late period (P<0.05) embryonic mortality. In present study, the highest hatchability and the lowest embryonic mortality rate (except for MPEM) were in the dark brown eggshell group. For all groups, the differences in fertility rate were insignificant (P>0.05). The highest hatching characteristics and the lowest embryonic mortality rates were determined in the dark brown eggs. Based on these results, to achieve higher a hatchability of total eggs, hatchability of fertile eggs and a lower embryonic mortality rate, it may be beneficial selection of dark brown pheasant eggs.Keywords: Biliverdin, egg, hatching characteristics, pheasant, protoporphyrin. Sülünlerde (Phasianus Colchicus) yumurta ağırlığı ve yumurta kabuğundaki protoporfirin ve biliverdin miktarının kuluçka özellikleri ve embriyonal ölüm üzerine etkisiÖzet: Bu araştırma, sülünlerde yumurta ağırlığı ve yumurta kabuğundaki protoporfirin ve biliverdin miktarının kuluçka özellikleri ve embriyonik ölüm üzerine etkisini araştırmak amacıyla yapılmıştır. Araştırmada 48 haftalık sülünlerden elde edilen toplam 1908 yumurta kullanılmıştır. Yumurtalar üç renk grubu (koyu kahve, açık kahve ve yeşil) ve iki ağırlık grubu (≤32 g ve 320.05) bulunmuştur. En yüksek kuluçka performansı, kuluçka oranı ve en düşük embryonik ölüm oranı koyu kahve kabuklu yumurtalarda bulunmuştur. Bu sonuçlara bağlı olarak, daha yüksek bir kuluçka randımanı, çıkım gücü ve daha düşük bir embriyonik ölüm oranı elde etmek için, koyu kahverengi sülün yumurtala...

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Section: Introductionmentioning

confidence: 99%

Effect of egg weight and amount of protoporphyrin and biliverdin in the egg shell on hatching characteristics and embryonal mortality in pheasants (Phasianus Colchicus)

DAŞ

2017

Ankara Üniversitesi Veteriner Fakültesi Dergisi

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“…On the basis of these data, the researchers suggested that the brightness of the eggshell would decrease whilst the colour intensity of the eggshell would increase in eggs laid by female quails fed as such. Several studies have pointed out to a positive correlation between eggshell colour and the health status of the female and/or chick, and parameters of immune capacity such as maternal antibody levels and yolk testosterone and yolk lutein concentrations (Moreno et al, 2005;Hargitai et al, 2008). The pigments held responsible for the formation of reddish spots in spotted eggs, according to the structuralfunction hypothesis, namely, the protoporphyrins, are R. Bras.…”

Section: Introductionmentioning

confidence: 99%

The impact of eggshell colour and spot area in Japanese quails: II. Slaughter and carcass characteristic

et al. 2016

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-This study was carried out to investigate the effects of eggshell colour and spot properties (colour and size of the spot area) on growth performance and carcass traits of Japanese quail (Coturnix coturnix japonica) eggs. Study material were allocated to five groups according to their eggshell and spot colours: black spots on greyish white coloured eggshell (I), blue spots on greyish white coloured eggshell (II), diffuse brown spots on greyish brown coloured eggshell (III), brown spots on light green colored eggshell (IV), and small brown spots on greyish brown coloured eggshell (V). The size of the spotted area was determined in each egg group using digital image analysis. The groups did not differ for body weight and length of the shank at the end of the growth period. However, the groups differed significantly for carcass yield after slaughter (not eviscerated) and carcass yield. These parameters were highest in Group I (82.08 and 76.09%) and lowest in Group III (80.20 and 73.86%). Digital image analysis demonstrated that heart length, cardiac fat area, gizzard width, and intestine length varied between the groups. Cardiac fat area was largest in Group III (0.86 cm 2 ) and smallest in Group V (0.65 cm 2 ). Gizzard width was greatest in Group I (2.63 cm) and smallest in Group V (2.47 cm). Intestine length was greatest in Group V (78.45 cm) and smallest in Group IV (72.39 cm). Body weight, shank length, and slaughter and carcass weight do not vary in relation to eggshell colour or the size of the spotted area. The lengths of intestine and heart, gizzard width, and cardiac fat area do vary in relation to eggshell colour or the size of the spotted area.

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“…Egg colours may also be sexually selected (e.g. [26]) or important for egg recognition in brood parasitized birds (e.g. [66]).…”

Section: Discussionmentioning

confidence: 99%

The evolution of eggshell cuticle in relation to nesting ecology

et al. 2016

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Avian eggs are at risk of microbial infection prior to and during incubation. A large number of defence mechanisms have evolved in response to the severe costs imposed by these infections. The eggshell's cuticle is an important component of antimicrobial defence, and its role in preventing contamination by microorganisms in domestic chickens is well known. Nanometer-scale cuticular spheres that reduce microbial attachment and penetration have recently been identified on eggs of several wild avian species. However, whether these spheres have evolved specifically for antimicrobial defence is unknown. Here, we use comparative data on eggshell cuticular structure and nesting ecology to test the hypothesis that birds nesting in habitats with higher risk of infection (e.g. wetter and warmer) are more likely to evolve cuticular nanospheres on their eggshells than those nesting in less risky habitats. We found that nanostructuring, present in 54 of 296 analysed species, is the ancestral condition of avian eggshells and has been retained more often in taxa that nest in humid infection-prone environments, suggesting that they serve critical roles in antimicrobial egg defence.

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Evidence for the signaling function of egg color in the pied flycatcher Ficedula hypoleuca

Cited by 104 publications

References 37 publications

Effect of egg weight and amount of protoporphyrin and biliverdin in the egg shell on hatching characteristics and embryonal mortality in pheasants (Phasianus Colchicus)

Effect of egg weight and amount of protoporphyrin and biliverdin in the egg shell on hatching characteristics and embryonal mortality in pheasants (Phasianus Colchicus)

The impact of eggshell colour and spot area in Japanese quails: II. Slaughter and carcass characteristic

The evolution of eggshell cuticle in relation to nesting ecology

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