Aggression in group housed male mice – a systematic review

Review question / Objective: By systematically reviewing articles investigating male mouse aggression we wanted to map how the literature in the field support, or not, the available recommendations on how to prevent aggression in group housed male mice, and to detect knowledge gaps that ought to be filled. We also wanted to address and describe how aggression have been measured in the literature, since this may influence the possibility to translate outcomes to normal husbandry conditions and contribute to useful recommendations. Condition being studied: Aggression between male cage mates is one of the main problems in laboratory mouse husbandry, affecting both animal welfare and scientific quality.