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Geographical variation in egg size dimorphism in rockhopper penguins
(Springer, 2010-04)
All crested penguins present a unique reversed hatching asynchrony: the larger second-laid egg (B-egg) hatches before the smaller first-laid egg (A-egg). Although both eggs often hatch, the A-chick generally dies of ...
MAGELLANIC PENGUIN (SPHENISCIDAE) MONITORING RESULTS FOR MAGDALENA ISLAND (CHILE) 2000 - 2008
(Universidad de Magallanes, 2008)
The influence of diet composition on egg and chick traits in captive Greater Rhea females
(Taylor & Francis, 2013-01)
1. This study was conducted to evaluate the influence of diet composition on egg number,physical and chemical characteristics of eggs and weight and survival of chicks throughout a breeding season in a captive-bred population ...
Do shiny cowbird females adjust egg pecking behavior according to the level of competition their chicks face in host nests?
(Elsevier Science, 2012-02)
Interspecific brood parasites, like the shiny cowbird (Molothrus bonariensis), lay eggs in nests of other species. Shiny cowbird females peck and puncture eggs when they parasitize host nests. This behavior increases the ...
Compensatory effect of egg size dimorphism on hatching asynchrony in Magellanic penguin
(Wiley Blackwell Publishing, Inc, 2021-07)
Egg laying is one of the most important phases in a female bird’s breeding cycle. Its cost is high because eggs contain all the resources needed for the development of an embryo. Variation in size and quality of eggs can ...
Maternal dietary carotenoids mitigate detrimental effects of maternal GnRH on offspring immune function in Japanese quail (Coturnix japonica)
(Wiley, 2013-12)
Maternal resources deposited in eggs can affect the development of several offspring phenotypic traits and result in trade-offs among them. For example, maternal androgens in eggs may be beneficial to offspring growth and ...
Poultry Egg Incubation: Integrating and Optimizing Production Efficiency
(Facta-fundacio Arnco Ciencia Tecnologia Avicolas, 2016-10-01)
Due to its central position in the production chain, in-ovo development is influenced by pre-incubation factors that affect the quality of embryonated eggs and incubation conditions themselves, and both may influence egg ...
Effect of maternal environment on yolk immunoreactive corticosterone and its influence on adrenocortical and behavioral activity in chicks of Greater Rhea (Rhea americana)
(Elsevier, 2019-08)
Maternal corticosterone in avian eggs may modify offspring phenotype in order to increase survival in poor environments. In the Greater Rhea (Rhea americana), we previously found that yolk immunoreactive corticosterone is ...
Metabolic and Hematological Responses to Endotoxin-Induced Inflammation in Chicks Experiencing Embryonic 2,3,7,8-Tetrachlorodibenzodioxin Exposure
(Wiley-Blackwell, 2020-09-01)
Dioxin exposure during bird embryonic development disrupts immunity as well as mechanisms involved in energy metabolism, potentially affecting negatively acute-phase responses to pathogens. Thus, we hypothesized that ...