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Physiology of turkey embryos during pipping and hatching. V. Plasma total calcium, magnesium concentrations, and total calcium to magnesium ratios.

Authors
Type
Published Article
Journal
Poultry science
Publication Date
Volume
61
Issue
9
Pages
1918–1923
Identifiers
PMID: 7134147
Source
Medline

Abstract

Plasma total calcium to magnesium ratios were observed as an index of muscular activity during pipping and hatching of chick and poult embryos. No significant changes were observed in plasma calcium (Ca) or magnesium (Mg) concentrations, but the total Ca to Mg ratio increased significantly just prior to pipping. Lighting the incubator during the last 5 days of incubation in significantly increased plasma Ca and Ca:Mg ratios. Lighting also resulted in significantly better hatchability and less late embryonic mortality. An increased plasma Ca:Mg ratio may be a physiological mechanism to provide increased muscular activity for the embryo in breaking the shell and emerging from it.

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