On the dual nature of maternal aggression in rats

✍ Scribed by Aldo B. Lucion; Rosa M.M. de Almeida

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 532 KB
• Volume: 22
• Category: Article
• ISSN: 0096-140X
• DOI: 10.1002/(sici)1098-2337(1996)22:5<365::aid-ab5>3.0.co;2-i

✦ Synopsis

Presentation of a natural predator, a cat, was used to differentiate elements of maternal attack by female rats on a male intruder. Following exposure (without direct physical contact) of pgst-partum females to a cat or to a toy stuffed cat (control group), the females were replaced in their home cages and presented with a male intruder rat. Cat exposure reliably decreased lateral attack to the intruder, as well as locomotion, but had no effect on either jump attack or an upright defensive posture (boxing). Since predator exposure produces a somewhat durable increase in defense, along with inhibition of nondefensive behavior, these results suggest that maternal aggression represents a mixture of offensive, usually related to competition, and defensive (protective) behaviors. The results indicate that maternal aggression, as a parental care behavior, appears to be at least partially resistant to fear. o 1996 Wiley-Liss, Inc.