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DOI:
https://doi.org/10.5007/%25xAbstract
The ethological approach to aggression stressed the importance of the resident-intruder model to investigate agonistic behavior in the albino rat. But established colonies of domestic rats can either ignore or accept peacefully a male intruder. Sometimes intruders may also submit resident males. In the domestic rat population (Wistar strain), the existence of 3 types of dominant males is described. The preference for moderate males when using the resident intruder model is upheld.
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