Show simple item record Himmler, Stephanie M. Lewis, Jena M. Pellis, Sergio M. 2019-12-09T23:20:09Z 2019-12-09T23:20:09Z 2014
dc.identifier.citation Himmler, S. M., Lewis, J. M., & Pellis, S. M. (2014). The development of strain typical defensive patterns in the play fighting of laboratory rats. International Journal of Comparative Psychology, 27(3), 385-396. en_US
dc.description Open access article. Creative Commons Attribution 4.0 International License (CC BY 4.0) applies en_US
dc.description.abstract During play fighting, rats attack and defend the nape, which if contacted is nuzzled with the snout. While all strains of rats use the same suite of defensive tactics to protect the nape, different strains use some tactics more frequently. This study tests two hypotheses for this strain difference: (1) each strain has a preference for using particular tactics and (2) strain differences in defense are a byproduct of strain differences in patterns of nape attack. Juvenile Long-Evans (LE) and Sprague-Dawley (SD) males, raised in same strain quads from shortly after weaning to the early juvenile period (i.e., 24-31 days), were tested with unfamiliar same-strain and different-strain partners (Experiment 1) and LE and SD males raised in mixed LE-SD quads were tested with both familiar (Experiment 2) and unfamiliar same-strain and different-strain partners. If hypothesis (1) were true, they would maintain strain-typical defense patterns irrespective of the strain of the attacking partner, whereas if hypothesis (2) were true, it would vary with the strain of the attacking partner. Hypothesis (1) was supported in the first experiment; all the rats maintained their strain-typical patterns regardless of the partner’s strain. However, Experiments 2 and 3 supported neither hypothesis, as each animal displayed strain-divergent behavior when playing with partners of either strain. Given that in Experiments 2 and 3, subjects were reared in mixed-strain groups, it is possible that, during the early juvenile period, play fighting experiences shape strain-typical patterns of use of defensive tactics. en_US
dc.language.iso en_US en_US
dc.publisher eScholarship Publishing, University of California en_US
dc.subject Play fighting in rats en_US
dc.subject Defensive action en_US
dc.subject Playful attack en_US
dc.subject Strain-typical en_US
dc.subject Same-strain en_US
dc.subject Different-strain en_US
dc.subject Mixed strain en_US
dc.subject Laboratory rats
dc.subject.lcsh Animals--Play behavior
dc.subject.lcsh Play behavior in animals
dc.subject.lcsh Rats--Behavior
dc.title The development of strain typical defensive patterns in the play fighting of laboratory rats en_US
dc.type Article en_US
dc.publisher.faculty Arts and Science en_US
dc.publisher.department Department of Neuroscience en_US
dc.description.peer-review Yes en_US
dc.publisher.institution University of Lethbridge en_US

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