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dc.contributor.advisorMessier, Françoisen_US
dc.contributor.advisorMcLoughlin, Philip D.en_US
dc.creatorVander Wal, Ericen_US
dc.date.accessioned2011-07-18T08:11:59Zen_US
dc.date.accessioned2013-01-04T04:45:45Z
dc.date.available2012-08-18T08:00:00Zen_US
dc.date.available2013-01-04T04:45:45Z
dc.date.created2011en_US
dc.date.issued2011en_US
dc.date.submitted2011en_US
dc.identifier.urihttp://hdl.handle.net/10388/etd-07182011-081159en_US
dc.description.abstractMany mammals are social. The most basic social behaviour is when the actions of one conspecific are directed toward another, what we call the ‘dyadic interaction’. Both intrinsic and extrinsic factors may affect an individual’s propensity to interact with other members of a population. I used a social cervid, elk (Cervus elaphus), as a model species to test the importance of intrinsic and extrinsic factors of sociality on dyadic interactions. Dyadic interactions not only form the basis for social structure and information transfer within a population, but are also routes of pathogen transmission. My objective in this thesis was thus twofold: to improve our understanding of sociobiology, but also to gain insight into how sociality may underlie the transmission of communicable wildlife disease. I used a hierarchical, autecological approach from DNA, through individual, dyad, group, subpopulation, and ultimately population to explore the effects of intrinsic factors (e.g., sex and pairwise genetic relatedness) and extrinsic factors (e.g., season, conspecific density, habitat, and elk group size) on sociality. Elk in Riding Mountain National Park (RMNP), Manitoba, Canada, are exposed to the causal agent of bovine tuberculosis (Mycobacterium bovis; TB); however, spatial variation in apparent disease prevalence suggests that TB can only persist in one subpopulation within the Park. Using the natural RMNP system and a captive elk herd that I manipulated, I explored factors that influence interaction rates and durations (as a proxy for pathogen transmission) among elk. Sexual segregation in elk results in seasonal and sex-based differences in interaction rate and duration; with interactions peaking in autumn-winter for both sexes. Female-female dyads interact more frequently than male-male dyads. However, male-male dyads interact for longer durations than do female-female dyads. Interaction rate and duration did not covary with pairwise relatedness. Conspecific density also had sex-specific results for interaction rate and duration. Whereas male-male dyadic interaction rates increase with density, female-female dyads increase until they reach a threshold and subsequently reduce their interaction rates at high density. I observed density dependence in interaction rates in experimental trials and from field data. Furthermore, social networks revealed that social familiarity (i.e., heterogeneity of interactions) can be both frequency- and- density dependent depending on the strength of the relationship (i.e., number of repeat interactions). Density also affected the likelihood that an interaction would occur; however, this was modified by vegetation association used by elk. My results reveal several ecological and evolutionary implications for information transfer and pathogen transmission. In particular, I show that seasonal inter-sex routes of transfer may exist and that transfer is likely to be density-dependent. Finally, I conclude that such transfer is modified by available resources.en_US
dc.language.isoen_USen_US
dc.subjectSpatial scaleen_US
dc.subjectSexual segregationen_US
dc.subjectSocial network analysisen_US
dc.subjectSocialityen_US
dc.subjectPathogen transmissionen_US
dc.subjectRiding Mountain National Parken_US
dc.subjectRelatednessen_US
dc.subjectBehaviouren_US
dc.subjectBovine tuberculosisen_US
dc.subjectHabitaten_US
dc.subjectInformation flowen_US
dc.subjectInteraction rateen_US
dc.subjectIsoclineen_US
dc.subjectCervus elaphusen_US
dc.subjectMycobacterium bovisen_US
dc.subjectLandscape geneticsen_US
dc.subjectWildlife managementen_US
dc.subjectGroup sizeen_US
dc.subjectFrequency dependenceen_US
dc.subjectDensity dependenceen_US
dc.subjectDiseaseen_US
dc.subjectElken_US
dc.titleSex, friends, and disease: social ecology of elk (Cervus elaphus) with implications for pathogen transmissionen_US
thesis.degree.departmentBiologyen_US
thesis.degree.disciplineBiologyen_US
thesis.degree.grantorUniversity of Saskatchewanen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophy (Ph.D.)en_US
dc.type.materialtexten_US
dc.type.genreThesisen_US
dc.contributor.committeeMemberPaquet, Paul C.en_US
dc.contributor.committeeMemberLeighton, F. (Ted)en_US
dc.contributor.committeeMemberNeal, B. (Dick)en_US
dc.contributor.committeeMemberShury, Todden_US
dc.contributor.committeeMemberMerrill, Evelyn H.en_US


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