The Effect of Embryonic Development on the Thickness of the Egg Shells of Coturnix Quail

Kreitzer, J. F.

doi:10.3382/ps.0511764

Cited by 26 publications

(7 citation statements)

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“…The decrease in eggshell thickness indicates the important effect of calcium uptake by the Capercaillie embryos, which has also been found in other precocial (Vanderstoep and Richards, 1970;Castilla et al, 2010a) and altricial bird species (Kreitzer, 1973;Orłowski et al, 2016). The 10% reduction in shell thickness is similar to the reduction observed in embryonated Reed Warbler (Acrocephalus scirpaceus) (Orłowski et al, 2016) and American Woodcock (Scolopax minor) eggs (Kreitzer, 1973), greater than Cedar Waxwing (Bombycilla cedrorum) (Rothstein, 1972) and Coturnix Quail eggs (Kreitzer, 1972), but smaller than Pied Flycatcher (Ficedula hypoleuca) eggs (Kern et al, 1992). Unfortunately, the process of shell thinning associated with embryo development has only been investigated in a small number of species.…”

Section: Discussionsupporting

confidence: 57%

Changes of Eggshell Characteristics during Embryo Development in Western Capercaillie (Tetrao Urogallus)

Rosenberger

Deeming

Łukaszewicz

et al. 2017

Avian Biology Research

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The influence of a developing bird embryo on eggshell thinning is well known, however this phenomenon has been described mainly for poultry, and in wild birds is poorly understood. This study focussed on Capercaillie (Tetrao urogallus), in which the effect of a developing embryo on the change of eggshell thickness has not been described. However, problems relating to a large number of dead embryos and eggs cracking during incubation are observed in captive breeding centres giving us the opportunity to test how the developing embryo affects the eggshell and thereby its properties, including eggshell strength and thickness. In total, 196 unhatched eggs, including 146 infertile and 50 eggs with embryos which died at various stages of development, were analysed in relation to eggshell shape, thickness and strength. Moreover, 102 posthatched eggshells were also examined. Although the strength of eggshell was affected by egg shape and shell thickness, contrary to expectations, the stage of embryonic development had no significant influence on eggshell strength. As has been demonstrated in other species, etching of eggshells by the developing embryo reduces shell thickness in Capercaillie but it has minimal effect on the strength of the eggshell. Egg viability is not compromised during the later stages of development by contact incubation with the female. The eggshell of infertile eggs or eggs containing earlydead embryos were 10% thicker than posthatched eggshells and eggs with late-dead embryos, confirming that eggshell thinning in Capercaillie is typical for precocial species

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Section: Discussionsupporting

confidence: 57%

Changes of Eggshell Characteristics during Embryo Development in Western Capercaillie (Tetrao Urogallus)

Rosenberger

Deeming

Łukaszewicz

et al. 2017

Avian Biology Research

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“…Values for shell erosion during incubation were 6% (Table 2), compared with 6-4% reported for the domestic fowl (Vanderstoep and Richards, 1970), 7-3% for the quail (Kreitzer, 1972) and 21% for the mallee fowl (Booth and Seymour, 1987).…”

Section: Allometric Relationships Between Fresh Egg Mass and Shell Chmentioning

confidence: 87%

Eggshell of the domestic guinea fowl

Ancel

Girard

1992

British Poultry Science

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1. Physical characteristics of eggs of the domestic guinea fowl, Numida meleagris galeata, were measured and compared with those of its wild counterpart and with other birds using allometric relationships. 2. The shell thickness increased and the area density of pores decreased from the blunt to the pointed end of the egg. During incubation, shell thickness decreased, but the shell diffusive conductance to water vapour (G H2O ) remained constant. 3. Fresh egg mass (m 0 ), length and breadth of the egg, G H2O and specific water vapour conductance, spG H2O (G H2O per g of m 0 ), were affected by the age of the laying flock. 4. Eggs of the domestic guinea fowl were bigger and heavier than eggs of the wild one. 5. Allometry showed that guinea fowl eggs differ from those of the other birds by their greater shell thickness and density of pores. However spG H2O was normal, the thickness of the shell being compensated for by a greater density of pores for gas exchanges.

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“…However, because both variables are correlated to some degree (Castilla et al, 2007(Castilla et al, , 2009b, we compared our data with examples from other studies, irrespective of the measurements taken. Precocial species showed decreases as follows: Coturnix japonica (7%, Kreitzer, 1972;or 19-33%, Castilla et al, 2007), Anas platyrhynchos (15-22%, Bennett, 1995), Colinus virginianus (17%, Bennett, 1995, Alectoris rufa (24%, Castilla et al, 2007). However, differences of 3-5 days in incubation time in the same species resulted in differences in the proportion of eggshell reduction during development of 14% and 7% for C. japonica (Castilla et al, 2007) and A. platyrhynchos (Bennett, 1995), respectively.…”

Section: Discussionmentioning

confidence: 99%

The effect of developmental stage on eggshell thickness variation in endangered falcons

Castilla

Herrel²,

Robles

et al. 2010

Zoology

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The Effect of Embryonic Development on the Thickness of the Egg Shells of Coturnix Quail

Cited by 26 publications

References 1 publication

Changes of Eggshell Characteristics during Embryo Development in Western Capercaillie (Tetrao Urogallus)

Changes of Eggshell Characteristics during Embryo Development in Western Capercaillie (Tetrao Urogallus)

Eggshell of the domestic guinea fowl

The effect of developmental stage on eggshell thickness variation in endangered falcons

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