The effects of population density upon correlates of emotionality and learning efficiency.
D000110:Acetylcholinesterase / Q000032:analysis; D000311:Adrenal Glands / Q000033:anatomy & histology; D000818:Animals; D001923:Brain Chemistry; D003672:Defecation; D004644:Emotions; D009929:Organ Size; D011156:Population Density; D011340:Problem Solving; D011582:Psychological Theory; D051381:Rats; D012934:Social Isolation
D000110:Acetylcholinesterase