Animals · 2020 · 35 citations · 24 references
AgricultureAnimal SciencesPoultry SciencePoultry BehaviorPoultry GeneticsPoultry WelfareBehavioral Indicators Of WelfareBroiler GeneticsBroiler Growth PerformanceGenetic EvaluationPoultry ProductionAdaptabilityAdaptability AnalysisBreast Milk YieldEvaluationGenetic Effects On Carcass YieldHen ProductivityMuscle-to-bone RatioPoultry Behavior Analysis
In alterative rearing systems, the use of outdoor space has a crucial role. It is well known that only some commercial poultry genotypes are suitable to be reared in these systems. It is necessary to find a balance between productive performance and adaptability. The aim of this study was to evaluate the productive performance, behavior, and welfare status of six poultry genotypes reared in an organic system. One hundred males/genotype (Hubbard RedJA (A), CY5XJA87 (CY), M22XJA87 (M), Ranger Classic (R1), Ranger Gold (R2), and Rowan Ranger (R3)) were reared from 1 to 81 days of age. The number of culled birds was recorded daily, whereas live weight and feed consumption were recorded weekly. Behavior evaluation was undertaken through a computerized system one week before slaughtering; the breast yield and muscle/bone ratio of the drumstick was also evaluated in refrigerated carcasses. The results showed that A and R3 had good adaptability, showing active behaviors and satisfactory productive performance 3083.6 g and 3022.1 g, respectively. Although CY and M achieved the best productive performance, they did not appear adapted to the organic system due to a higher frequency of static behaviors (rest and roost), mortality, footpad dermatitis, breast blisters, and poor feather condition.
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Relationships in broiler chickens between lameness, liveweight, growth rate and age
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