Short communication: Effects of breeder age and pre-placement feed on IgY concentration in egg yolk and chick serum.

Autor: Cardeal PC; Vialiagro, Belo Horizonte, Brazil., Araújo ICS; Department of Animal Science, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, Brazil., Vaz DP; Department of Animal Science, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, Brazil., Abreu ARC; Department of Animal Science, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, Brazil., Melo ÉF; Boehringer Ingelheim, Pará de Minas, Brazil., Saldanha MM; Department of Animal Science, Rural Federal University of Amazonas, Paraupebas, Brazil., Pompeu MA; Centro Universitário de Formiga, Formiga, Brazil., Lara LJC; Department of Animal Science, Veterinary School, Federal University of Minas Gerais, Belo Horizonte, Brazil.
Jazyk: angličtina
Zdroj: Journal of animal physiology and animal nutrition [J Anim Physiol Anim Nutr (Berl)] 2022 May; Vol. 106 (3), pp. 561-565. Date of Electronic Publication: 2021 Jul 07.
DOI: 10.1111/jpn.13604
Abstrakt: Breeder age and pre-placement feed are factors that can affect broiler performance during grow out. This study evaluated the effects of breeder age (29 and 55 weeks old) on IgY transference to egg yolk in addition to the effects of breeder age (29 and 55 weeks old) and pre-placement feed (with or without), in a factorial arrangement, on IgY concentration in chick serum. Forty-eight eggs were collected from a breeder flock and considered the experimental units. Eighteen chicks from each breeder age were randomly selected to determine IgY at pulling. After 48 h of placement, old breeders had greater egg weight and yolk weight (p ≤ 0.05) than the young ones. Breeder age (p > 0.05) had no effect on IgY concentration of egg yolk. Breeder age (p > 0.05) had no effect on IgY concentration of chick serum at pulling. There was no interaction (p > 0.05) between breeder age and pre-placement feed for IgY concentration of chick serum at housing. There was also no effect of breeder age or pre-placement feed during placement time (48 h) on IgY concentration of chick serum at housing (p > 0.05). In conclusion, 48 h of fasting had no effect on IgY concentration in chick serum despite breeder age. It appears that the immunoglobulins from the residual yolk sac are not used as a protein source during the period between hatching and housing.
(© 2021 Wiley-VCH GmbH.)
Databáze: MEDLINE
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