Clough, Dagmar

[["dc.bibliographiccitation.firstpage","245"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Journal of Parasitology"],["dc.bibliographiccitation.lastpage","251"],["dc.bibliographiccitation.volume","96"],["dc.contributor.author","Clough, Dagmar"],["dc.date.accessioned","2022-10-06T13:26:32Z"],["dc.date.available","2022-10-06T13:26:32Z"],["dc.date.issued","2010"],["dc.identifier.doi","10.1645/GE-2258.1"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/115105"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-602"],["dc.relation.eissn","1937-2345"],["dc.relation.issn","0022-3395"],["dc.relation.orgunit","Deutsches Primatenzentrum"],["dc.title","Gastro-Intestinal Parasites of Red-Fronted Lemurs in Kirindy Forest, Western Madagascar"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","215"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Endangered Species Research"],["dc.bibliographiccitation.lastpage","225"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","Schwitzer, N."],["dc.contributor.author","Clough, Dagmar"],["dc.contributor.author","Zahner, H."],["dc.contributor.author","Kaumanns, W."],["dc.contributor.author","Kappeler, Peter"],["dc.contributor.author","Schwitzer, Christoph"],["dc.date.accessioned","2017-09-07T11:48:20Z"],["dc.date.available","2017-09-07T11:48:20Z"],["dc.date.issued","2010"],["dc.description.abstract","The parasite burden of an animal population has frequently been used as an indicator of the stress level to which the population is exposed. Primates inhabiting small forest fragments are more likely to experience human contact, reduced food availability and restricted ranging—any or all of which may contribute to a higher parasite prevalence—than populations inhabiting intact primary forest. Recent and ongoing human exploitation of otherwise intact forest may also affect disease burden and parasite transmission in primates. The parasites of blue-eyed black lemurs Eulemur flavifrons have not as yet been subject to scientific research. This paper describes the various parasites found in E. flavifrons and shows parasite prevalence in lemur groups living in differently degraded fragments of the Ankarafa Forest in Sahamalaza National Park, northwest Madagascar. We analysed 166 faecal samples of E. flavifrons inhabiting primary forest and 168 from groups inhabiting secondary forest. In addition, faecal samples and ectoparasites were collected from 18 immobilised lemurs. Forty-three (12.9%) samples contained parasite eggs (Lemuricola spp. and Callistoura spp.) or oocysts. Ten (55.6%) of the 18 samples from immobilised lemurs contained adult Lemuricola spp. Parasite prevalence was significantly higher in secondary than in primary forest, at 7.9 and 4.8% of all positive samples, respectively. Prevalence was high when compared to other studies on parasite load in wild lemurs, suggesting that in our survey area, E. flavifrons were generally under pressure, possibly due to the high degree of fragmentation and degradation of the remaining forest habitat."],["dc.identifier.doi","10.3354/esr00304"],["dc.identifier.gro","3150783"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9074"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7573"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","1863-5407"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject","Eulemur flavifrons; Primary forest; Secondary forest; Lemuricola; Callistoura; Seasonality"],["dc.title","Parasite prevalence in blue-eyed black lemurs Eulemur flavifrons in differently degraded forest fragments"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["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","29"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Animal Behaviour"],["dc.bibliographiccitation.lastpage","36"],["dc.bibliographiccitation.volume","77"],["dc.contributor.author","Port, Markus"],["dc.contributor.author","Clough, Dagmar"],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2017-09-07T11:48:23Z"],["dc.date.available","2017-09-07T11:48:23Z"],["dc.date.issued","2008"],["dc.description.abstract","Social grooming is a commonly observed affiliative behaviour in primates. Grooming has been suggested to represent a service in a biological marketplace, exchanged either for grooming or for other social commodities or services. Accordingly, grooming is predicted to be approximately reciprocated within a dyad when no other services are being exchanged, but it should be more asymmetrical if partners have different quantities of other services to offer. We analysed 412 grooming bouts observed in four groups of free-ranging redfronted lemurs to test this prediction. Grooming in this species seems to take place in a highly reciprocal manner because partners usually alternate in the roles of groomer and gromee within a grooming bout. However, within dyads there were asymmetries in the duration of grooming given and received. In both sexes, more grooming was directed from low-ranking towards high-ranking individuals than vice versa, and in males this asymmetry became more pronounced as the number of subordinates per group increased. Grooming in bisexual dyads was generally skewed in favour of males, but patterns of grooming between the sexes were less clear than within the sexes. In addition, aggression occurred at high frequencies between classes of individuals that were characterized by nonreciprocal grooming, suggesting that grooming may serve as a means to reduce aggression in dyads with a high potential for conflicts. Taken together, our results indicate that a strict reciprocation of grooming can be offset by power differentials between partners, where grooming appears to be traded by subordinates in exchange for the tolerance of dominants."],["dc.identifier.doi","10.1016/j.anbehav.2008.08.032"],["dc.identifier.gro","3150787"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7578"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0003-3472"],["dc.title","Market effects offset the reciprocation of grooming in free-ranging redfronted lemurs, Eulemur fulvus rufus"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","9"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Frontiers in Zoology"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Clough, Dagmar"],["dc.contributor.author","Kappeler, Peter"],["dc.contributor.author","Walter, Lutz"],["dc.date.accessioned","2017-09-07T11:48:58Z"],["dc.date.available","2017-09-07T11:48:58Z"],["dc.date.issued","2011"],["dc.description.abstract","BackgroundSusceptibility to parasite infection affects fitness-related processes, such as mate choice and survival, yet its genetic regulation remains poorly understood. Interleukin-4 (IL4) plays a central role in the humoral immune defence against nematode parasite infections, inducing IgE switch and regulation of worm expulsion from the intestines. The evolutionary and functional significance of single nucleotide polymorphisms (SNPs) in IL4-genes is known, yet empirical information on the effect of IL4 SNPs on gastro-intestinal infections is lacking. Using samples from a population of wild red-fronted lemurs (Eulemur fulvus rufus, Primates: Lemuridae), from western Madagascar, we explored the association of IL4-gene promoter polymorphisms with nematode infections and investigated a possible functional role of the IL4 polymorphism on male reproductive success.ResultsUsing sequence analyses of lemur DNA we detected a new SNP in the IL4 gene promoter area. Carriers of the genotype T/T showed higher nematode infection intensities than individuals of genotypes C/T and C/C. Genetic population analyses using data from more than 10 years, suggested higher reproductive success of T/T males than expected.ConclusionsOur results suggest a regulatory effect of an IL4 gene promoter polymorphism on the intensity of parasite infections in a natural population of red-fronted lemurs, with a seemingly disadvantageous genotype represented in low frequencies. Long-term population analyses, however, point in the direction of a negative frequency-dependent association, giving a fitness advantage to the rare genotype. Due to low frequencies of the genotype in question conclusive evidence of a functional role of IL4 polymorphism cannot be drawn here; still, we suggest the use of IL4 polymorphism as a new molecular tool for quick assessment of individual genetic constitution with regard to nematode infection intensities, contributing to a better understanding of the actual components of the immune response that mediate protection against gastro-intestinal parasites."],["dc.identifier.doi","10.1186/1742-9994-8-9"],["dc.identifier.gro","3150917"],["dc.identifier.pmid","21501512"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6364"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7717"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","1742-9994"],["dc.rights","CC BY 2.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/2.0"],["dc.title","Genetic regulation of parasite infection: empirical evidence of the functional significance of an IL4 gene SNP on nematode infections in wild primates"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["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","449"],["dc.bibliographiccitation.issue","6452"],["dc.bibliographiccitation.journal","Science"],["dc.bibliographiccitation.lastpage","451"],["dc.bibliographiccitation.volume","365"],["dc.contributor.author","Pe'er, Guy"],["dc.contributor.author","Zinngrebe, Yves"],["dc.contributor.author","Moreira, Francisco"],["dc.contributor.author","Sirami, Clélia"],["dc.contributor.author","Schindler, Stefan"],["dc.contributor.author","Müller, Robert"],["dc.contributor.author","Bontzorlos, Vasileios"],["dc.contributor.author","Clough, Dagmar"],["dc.contributor.author","Bezák, Peter"],["dc.contributor.author","Bonn, Aletta"],["dc.contributor.author","Hansjürgens, Bernd"],["dc.contributor.author","Lomba, Angela"],["dc.contributor.author","Möckel, Stefan"],["dc.contributor.author","Passoni, Gioele"],["dc.contributor.author","Schleyer, Christian"],["dc.contributor.author","Schmidt, Jenny"],["dc.contributor.author","Lakner, Sebastian"],["dc.date.accessioned","2019-08-13T07:54:36Z"],["dc.date.available","2019-08-13T07:54:36Z"],["dc.date.issued","2019"],["dc.description.abstract","The Common Agricultural Policy (CAP) of the European Union (EU) is one of the world's largest agricultural policies and the EU's longest-prevailing one. Originally focused mostly on supporting production and farm income, the CAP has progressively integrated instruments to support the environment. Nonetheless, there is considerable agreement among EU citizens that the CAP still does not do enough to address ongoing environmental degradation and climate change (92% of nonfarmers, 64% of farmers) (1). In May and June 2018, the European Commission (EC) published the financial plan and legislative proposal for the CAP post-2020 (2), prompting numerous proposed amendments that the newly elected European Parliament (EP) will now have to consider. With an eye toward the next and final reform stages, including budget discussions and “trilogue” negotiations between the EC, the Council, and the EP to begin in autumn 2019, we examine whether the proposed post-2020 CAP can address key sustainability issues and meet societal demands for higher environmental performance."],["dc.identifier.doi","10.1126/science.aax3146"],["dc.identifier.pmid","31371602"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62377"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.eissn","1095-9203"],["dc.relation.issn","0036-8075"],["dc.relation.issn","1095-9203"],["dc.title","A greener path for the EU Common Agricultural Policy"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["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"]]