Effect of body weight on uniformity, livability, and skeletal development and strength of broiler breeder females

X. Asensio*, J. Piedrafita, A. Puente, A. C. Barroeta

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

Abstract

An experiment was conducted with broiler breeder females (up to 30 wks of age) to study the effect of body weight (BW) at 5 wks on BW uniformity, livability, and skeletal development and strength. At 5 wks of age, 160 females were randomly selected within a flock of 1,988, and they were reared without grading. Among these 160 females, the 40 with the lowest BW (Light Non-Graded, LNG) and the 40 with the highest BW (Heavy Non-Graded, HNG) were studied. LNG females, compared to HNG, had a higher BW coefficient of variation (CV) from 10 to 25 wks (P ≤ 0.05). At 25 wks, mortality of the LNG females was higher (20.0% vs. 2.5%, P = 0.027); they had shorter tibias (P ≤ 0.05), and a tendency to lower-tibia breaking strength (P = 0.085) and elastic modulus (P = 0.072). At 5 wks, their alkaline phosphatase was lower (2781 UI vs. 3839 UI, P = 0.023), and taking together 5 and 10 wks their osteocalcin was also lower (976 ng vs. 1239 ng, P = 0.029). Results indicate that without grading in rearing, light females had lower BW uniformity, lower livability, shorter and less resistant tibias than heavy females.

Original languageEnglish
Pages (from-to)320-325
Number of pages6
JournalJournal of Applied Animal Research
Volume48
Issue number1
DOIs
Publication statusPublished - 1 Jan 2020

Keywords

  • Broiler breeders
  • grading
  • skeletal development and strength
  • uniformity

Fingerprint

Dive into the research topics of 'Effect of body weight on uniformity, livability, and skeletal development and strength of broiler breeder females'. Together they form a unique fingerprint.

Cite this