Animal Aggression: Rats

Rat offense and defense: 

The Resident-Intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress
Jaap M. Koolhaas, Caroline M. Coppens, Sietse F. de Boer, Bauke Buwalda, Peter Meerlo, and Paul J.A. Timmermans. (2013). JoVE (Journal of Visualized Experiments), (77): 4367. Published online July 4, 2013. doi: 10.3791/4367 PMCID: PMC3731199. 

Illustration of the resident–intruder paradigm, which is now a standard protocol for studying aggression in rats. Residents show offensive aggression, intruders show defense.

Maternal aggression:

Using Chronic Social Stress to Model Postpartum Depression in Lactating Rodents
Carini, L. M., Murgatroyd, C. A., & Nephew, B. C. (2013). JoVE (Journal of Visualized Experiments), (76), e50324-e50324.

The overall goal of the experiment is to create a ethologically relevant rodent model to study postpartum mood disorders.


Peering Into the Dynamics of Social Interactions: Measuring Play Fighting in Rats
Himmler, B. T., Pellis, V. C., & Pellis, S. M. (2013). JoVE (Journal of Visualized Experiments), (71), e4288-e4288.

The aim of this procedure is to create a controlled environment which maximizes the occurrence of playful behavior and to analyze the organization of the resulting playful behavior.