Clough, Dagmar

[["dc.bibliographiccitation.firstpage","354"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Folia Primatologica"],["dc.bibliographiccitation.lastpage","354"],["dc.bibliographiccitation.volume","79"],["dc.contributor.author","Clough, Dagmar"],["dc.contributor.author","Kappeler, Peter"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Walter, Lutz"],["dc.date.accessioned","2018-03-22T13:22:45Z"],["dc.date.available","2018-03-22T13:22:45Z"],["dc.date.issued","2008"],["dc.description.abstract","Parasites are a driving force in sexual selection, but they can have negative impacts on their hosts. Hence, females should choose mates displaying good health and an ability to resist para-site infections. Assuming a genetic basis for parasite resistance, partners with low parasite infections should be preferred over others in order to obtain resistance genes for their offspring (parasite-mediated sexual selection). With our interdisciplinary approach we will contribute to understanding both determinants of individual parasite infections and mechanisms of para-site-mediated sexual selection in primates. Specifically, we analyze faecal samples of free-ranging red-fronted lemurs (Eulemur fulvus rufus)to characterize their intestinal parasite fauna by means of the formalin-ethyl-acetate sedimentation technique. Parasite infections are being cor-related with (1) genetic correlates at the interleukin-4 locus, which is involved in parasite resistance, (2) proximate endocrine factors (testosterone and cortisol) that co-vary with the functioning of the immune system, and (3) socio-demographic data, such as sex, age and population group size of the hosts that may influence parasite infestations. Moreover, we examine whether primates use honest signals, such as conspicuous coloration, in order to assess their mate’s genetic quality. Using data from paternity analyses of the study population, we will be able to link parasite infection with reproductive success of males with different genetic and endocrine constitutions. As data collection was just about finished at the start of this conference, the presentation will give an overview of the project and present preliminary data."],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/13119"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Parasite-mediated sexual selection in primates? The effect of intestinal parasites on the reproductive success of wild lemurs (Eulemur fulvus rufus)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","859"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","International Journal of Primatology"],["dc.bibliographiccitation.lastpage","875"],["dc.bibliographiccitation.volume","30"],["dc.contributor.author","Clough, Dagmar"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2017-09-07T11:49:00Z"],["dc.date.available","2017-09-07T11:49:00Z"],["dc.date.issued","2009"],["dc.description.abstract","Researchers studying individual variation in conspicuous skin coloration in primates have suggested that color indicates male quality. Although primate fur color can also be flamboyant, the potential condition dependence and thus signaling function of fur remains poorly studied. We studied sources of variation in sexually dichromatic facial hair coloration in red-fronted lemurs (Eulemur fulvus rufus). We collected data on 13 adult males in Kirindy Forest, Madagascar, during two study periods in 2006 and 2007, to determine whether variation in facial hair coloration correlates with male age, rank, androgen status, and reproductive success. We quantified facial hair coloration via standardized digital photographs of each male, assessed androgen status using fecal hormone measurements, and obtained data on reproductive success through genetic paternity analyses. Male facial hair coloration showed high individual variation, and baseline coloration was related to individual androgen status but not to any other parameter tested. Color did not reflect rapid androgen changes during the mating season. However, pronounced long-term changes in androgen levels between years were accompanied by changes in facial hair coloration. Our data suggest that facial hair coloration in red-fronted lemur males is under proximate control of androgens and may provide some information about male quality, but it does not correlate with dominance rank or male reproductive success."],["dc.identifier.doi","10.1007/s10764-009-9379-5"],["dc.identifier.gro","3150939"],["dc.identifier.pmid","19946601"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/4161"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7742"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","0164-0291"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Individual Facial Coloration in Male Eulemur fulvus rufus: A Condition-dependent Ornament?"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","441"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","American Journal of Physical Anthropology"],["dc.bibliographiccitation.lastpage","452"],["dc.bibliographiccitation.volume","142"],["dc.contributor.author","Clough, Dagmar"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2017-09-07T11:48:30Z"],["dc.date.available","2017-09-07T11:48:30Z"],["dc.date.issued","2010"],["dc.description.abstract","Parasites and infectious diseases represent ecological forces shaping animal social evolution. Although empirical studies supporting this link abound in various vertebrate orders, both the study of the dynamics and impact of parasite infections and infectious diseases in strepsirrhine primates have received little empirical attention. We conducted a longitudinal parasitological study on four groups of wild red-fronted lemurs (Eulemur fulvus rufus) at Kirindy Forest, Madagascar, during two field seasons in consecutive years to investigate i) the degree of gastrointestinal parasite infection on population and individual levels and ii) factors potentially determining individual infection risk. Using a comprehensive dataset with multiple individually assignable parasite samples as well as information on age, sex, group size, social rank, and endocrine status (fecal androgen and glucocorticoid), we examined parasite infection patterns and host traits that may affect individual infection risk. In addition, we examined whether parasite infection affects mating and reproductive success. Our results indicated high variability in parasite infection on individual and population levels. Time of year and group size was important determinants of variability in parasite infection. Variation in hormone levels was also associated with parasite species richness and parasite infection intensity. Differences in parasite infection between years indicate a potential immune-enhancing function of steroid hormones on nematode infections, which has not been reported before from other vertebrates studied under natural conditions. Male mating and reproductive success were not correlated to any measure of parasite infection, which suggests a nonfunctional role of the parasites we examined in primate sexual selection."],["dc.identifier.doi","10.1002/ajpa.21243"],["dc.identifier.gro","3150831"],["dc.identifier.pmid","20091843"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7624"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0002-9483"],["dc.title","Host intrinsic determinants and potential consequences of parasite infection in free-ranging red-fronted lemurs (Eulemur fulvus rufus)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]