title: Influence of yolk on blood metabolites in perinatal and neonatal chickens.
abstract: Two experiments were conducted to assess the role of the yolk sac during the perinatal period (i.e., from embryonic Day 18 through hatch) and until 15 days after hatching. Experiment 1 describes changes in several yolk components. Approximately 70% of the yolk was absorbed during the perinatal period. Moisture, lipid, protein, and carbohydrate fractions were all utilized during this period. In Experiment 2, the age at which set-point physiological levels of several blood metabolites, as well as the magnitudes of these levels, in deutectomized (DT) chicks (surgical ablation of the yolk sac within 1 hr post-hatch) were not different from non-DT controls. Results indicate that the yolk sac plays a central role in the hatching process of chicks, rather than serving as a major metabolic reserve during the neonatal period.
authors.affiliation: Mississippi State University 39762, USA.
authors.forename: S
authors.initials: S
authors.lastname: Puvadolpirod
authors.forename: J R
authors.initials: JR
authors.lastname: Thompson
authors.forename: J
authors.initials: J
authors.lastname: Green
authors.forename: M A
authors.initials: MA
authors.lastname: Latour
authors.forename: J P
authors.initials: JP
authors.lastname: Thaxton
mesh_terms: D000818:Animals; D000831:Animals, Newborn / Q000097:blood / Q000254:growth & development / Q000502:physiology; D001786:Blood Glucose / Q000378:metabolism; D001798:Blood Proteins / Q000378:metabolism; D002642:Chick Embryo / Q000254:growth & development / Q000378:metabolism* / Q000502:physiology; D002645:Chickens / Q000097:blood* / Q000254:growth & development / Q000502:physiology; D002784:Cholesterol / Q000097:blood; D005260:Female; D015017:Yolk Sac / Q000502:physiology* / Q000601:surgery
chemical_list: D001786:Blood Glucose; D001798:Blood Proteins; D002784:Cholesterol