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- Title
The effect of eggshell colour on early embryo development in the ring-necked pheasant (Phasianus colchicus).
- Authors
Nowaczewski, Sebastian; Grzegrzółka, Beata; Kukulski, Krzysztof; Kolanoś, Bartłomiej
- Abstract
Ring-necked pheasant females lay eggs with different shell colours, such as white, blue, olive or brown. Eggshell colour was found to be related to egg quality and hatchability. The experiment was carried out to determine the relationship between pheasant eggshell colour and embryo development during the first 72 hours of incubation. In total, 314 eggs (72 blue, 79 dark-brown, 78 light-brown and 85 olive) were collected and incubated. The Hamburger and Hamilton (HH) staging procedure [1951] was applied in the morphological evaluation of pheasant embryo preparations. After 24, 48 and 72 h of incubation, embryos reached the average stage of 4 HH, 10+ HH and 16 HH, respectively. The highest stage of development after 24 h of incubation was observed in embryos from blue eggs (4.23 HH) and the lowest from light-brown ones (3.96 HH), although the differences were not significant. Values of all the investigated traits of embryos (blastoderm and area vasculosa diameter, embryo length, pairs of somites and stage) from the blue-shelled egg group measured after 48 h were significantly lower in comparison to those of dark-brown eggs with a similar tendency observed in relation to eggs of other colours. These differences were not observed after 72 h of incubation. Egg weight loss after 72 h in the dark- and light-brown groups was significantly lower than in olive-shelled eggs. Moreover, significant correlations were found between some traits of the egg, embryo and extra-embryonic membranes in each time point of observations.
- Subjects
RING-necked pheasant; EGGSHELLS; EMBRYOS; HATCHABILITY of eggs; EGG quality
- Publication
Animal Science Papers & Reports, 2018, Vol 36, Issue 1, p75
- ISSN
0860-4037
- Publication type
Article