Social tension indexes and egg production traits in chickens.
D000367:Age Factors; D000374:Aggression; D000704:Analysis of Variance; D000818:Animals; D001522:Behavior, Animal; D002645:Chickens; D005260:Female; D005828:Genetics, Population; D006801:Humans; D010060:Ovulation; D010641:Phenotype; D012930:Social Dominance