The development of strain typical defensive patterns in the play fighting of laboratory rats

dc.contributor.authorHimmler, Stephanie M.
dc.contributor.authorLewis, Jena M.
dc.contributor.authorPellis, Sergio M.
dc.date.accessioned2019-12-09T23:20:09Z
dc.date.available2019-12-09T23:20:09Z
dc.date.issued2014
dc.descriptionOpen access article. Creative Commons Attribution 4.0 International License (CC BY 4.0) appliesen_US
dc.description.abstractDuring 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.description.peer-reviewYesen_US
dc.identifier.citationHimmler, 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. https://escholarship.org/uc/item/73k494jmen_US
dc.identifier.urihttps://hdl.handle.net/10133/5620
dc.language.isoen_USen_US
dc.publishereScholarship Publishing, University of Californiaen_US
dc.publisher.departmentDepartment of Neuroscienceen_US
dc.publisher.facultyArts and Scienceen_US
dc.publisher.institutionUniversity of Lethbridgeen_US
dc.publisher.urlhttps://escholarship.org/uc/item/73k494jm
dc.subjectPlay fighting in ratsen_US
dc.subjectDefensive actionen_US
dc.subjectPlayful attacken_US
dc.subjectStrain-typicalen_US
dc.subjectSame-strainen_US
dc.subjectDifferent-strainen_US
dc.subjectMixed strainen_US
dc.subjectLaboratory rats
dc.subject.lcshAnimals--Play behavior
dc.subject.lcshPlay behavior in animals
dc.subject.lcshRats--Behavior
dc.titleThe development of strain typical defensive patterns in the play fighting of laboratory ratsen_US
dc.typeArticleen_US
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