135 research outputs found
Electrolyte and Water Balance of the Early Avian Embryo: Effects of Egg Turning
No full textFormation of sub-embryonic fluid (SEF) is a key aspect of the physiology of the early avian embryo.Here we review the process of SEF formation and the factors which influence its composition and the rate of SEF production and depletion in the Japanese quail and domestic fowl.There is particular emphasis on the role of turning of the egg during incubation and we briefly consider
the broader role of egg turning during avian incubation. The bulk of the review deals with the growth of the area vasculosa of the yolk sac membrane, the cellular processes of SEF formation, and the water and electrolyte physiology of the avian embryo during the first half of incubation.We conclude with a brief discussion of the areas for future investigation
Relationships between eggshell pigmentation, ultrastructure and water vapour conductance in the Houbara bustard (Chlamydotis undulata macqueenii)
No full text
Electronic supplementary material - Unwin, D.M. & Deeming, D.C. Pre-natal development in pterosaurs from Prenatal development in pterosaurs and its implications for their postnatal locomotory ability
No full textElectronic supplementary material in support of Unwin, D. M. & Deeming D. C. Pre-natal development in pterosaurs. This file contains: further details of methods; a reassessment of the identity of IVPP V13938 (a pterosaur egg); a list of museum acronyms; data in the form of one figure and five tables; and supplementary references
Development of extra-embryonic membranes and fluid compartments
No full textAn account of the development of extra-embryonic membranes in the embryo of poultry. The roles of these membranes in the transfer of water from albumen to yolk and to embryonic tissue is reviewed
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