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Gregarious nesting in relation to floor eggs in broiler breeders
A C M van den Oever1, B Kemp2, T B Rodenburg3
1Vencomatic Group, P.O. Box 160, 5520 AD Eersel, the Netherlands; Adaptation Physiology Group, Wageningen University, P.O. Box 338, 6700, AH, Wageningen, the Netherlands.
Animal : an International Journal of Animal Bioscience
|February 13, 2021
Summary
Broiler breeders exhibit gregarious nesting, influenced by genetics, leading to welfare and economic issues like floor eggs. Genetic selection for even space use can improve broiler breeder welfare and performance.
Area of Science:
- Animal Science
- Behavioral Ecology
- Poultry Science
Background:
- Gregarious nesting in laying hens leads to overcrowding and floor eggs, impacting welfare and economics.
- Understanding spatial behavior and nesting preferences in broiler breeders is crucial for optimizing production and welfare.
Purpose of the Study:
- To investigate gregarious nesting and spatial behavior in broiler breeders.
- To determine the influence of genetic background, fearfulness, and mating behavior on these behaviors.
Main Methods:
- Five commercial broiler breeder genetic lines were studied from 20-60 weeks of age.
- Assessed plumage condition, wounds, fearfulness (avoidance distance, novel object test), egg distribution, space use, and (floor) egg production.
- Data collected at multiple time points throughout the study period.
Main Results:
- Significant differences in plumage condition, wounds, and fear of humans were observed between genetic lines and over time.
- Egg distribution over nests was uneven, influenced by genetic background and age, correlating with increased floor eggs.
- Spatial distribution varied by genetic line; reduced litter area use correlated with increased fear of humans and wounds, suggesting links to mating behavior.
Conclusions:
- Broiler breeders display gregarious nesting influenced by genetic background, impacting welfare and performance.
- Uneven nest use and spatial distribution are associated with increased floor egg percentages and wounds.
- Genetic selection for balanced nest and space utilization is recommended to enhance broiler breeder welfare and productivity.
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