Short communication: Effects of breeder age and pre-placement feed on IgY concentration in egg yolk and chick serum
| Autor: | Diego Pereira Vaz, Mariana Masseo Saldanha, M. A. Pompeu, Anna Rosa Chagas Abreu, P. C. Cardeal, Leonardo José Carmagos Lara, Érica Faria Melo, Itallo Conrado Sousa de Araújo |
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| Rok vydání: | 2021 |
| Předmět: |
endocrine system
food.ingredient animal diseases Immunoglobulins Biology food Breeder (animal) Animal science Food Animals Yolk medicine Animals Yolk sac Communication effects reproductive and urinary physiology Ovum Hatching Broiler food and beverages A protein Egg Yolk medicine.anatomical_structure embryonic structures Animal Science and Zoology Flock Chickens |
| Zdroj: | Journal of animal physiology and animal nutritionREFERENCES. 106(3) |
| ISSN: | 1439-0396 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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