Managing Free-Range Laying Hens-Part A: Frequent and Non-Frequent Range Users Differ in Laying Performance but Not Egg Quality

Animals : an Open Access Journal From MDPI
Terence Zimazile SibandaIsabelle Ruhnke

Abstract

Little is known about the impact of ranging on laying performance and egg quality of free-range hens. The aim of this study was to characterise egg production of commercial free-range laying hen sub-populations of low-, moderate- and high-range use at an early age. A total of five flocks with 40,000 hens/flock were investigated where 1875 hens/flock were randomly selected at 16 weeks of age, monitored for their range use and subsequently grouped into "stayers" (the 20% of hens that spent the least time on the range), "roamers" (the 20% of the hens that used the range more than stayers but less than rangers) and "rangers" (the 60% of the hens that spent the most time on the range). Eggs from the individual groups were collected in 10-weekly intervals until hens were 72 weeks of age, commercially graded and tested for several quality parameters. Significant differences were noted for hen-day production. For example, at 22 weeks of age, rangers enjoyed a laying rate of 88.0% ± 1.1%, while stayers performed at 78.2% ± 1.9% but at 72 weeks of age egg production of rangers was 85.1% ± 0.9% and of stayers was 95.5% ± 0.9% (p < 0.05). Range use was of minor importance to the egg quality.

References

May 1, 1980·Poultry Science·T D Siopes, W O Wilson
May 12, 2001·Applied Animal Behaviour Science·C E. ChanningA W. Walker
Oct 30, 2004·Poultry Science·F G Silversides, K Budgell
Feb 14, 2006·Journal of Applied Animal Welfare Science : JAAWS·T Bas RodenburgJohan Zoons
Dec 24, 2010·Poultry Science·A WolcJ C M Dekkers
Dec 24, 2010·Poultry Science·D C LayR E Porter
Dec 22, 2011·Journal of Agricultural and Food Chemistry·Julika LietzowGabriele I Stangl
Feb 28, 2014·British Poultry Science·A-M GilaniC J Nicol
Aug 2, 2014·Asian-Australasian Journal of Animal Sciences·M AhammedS J Ohh
Dec 7, 2014·Poultry Science·W A Matthews, D A Sumner
Dec 7, 2014·Poultry Science·D R JonesM M Makagon
Mar 20, 2016·Poultry Science·D L M CampbellJ M Siegford

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Citations

Apr 28, 2020·British Poultry Science·Terence Zimazile SibandaIsabelle Ruhnke
May 21, 2020·Animals : an Open Access Journal From MDPI·Terence Zimazile SibandaIsabelle Ruhnke

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