Hilgartner, Roland D.

[["dc.bibliographiccitation.firstpage","466"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Ethology"],["dc.bibliographiccitation.lastpage","479"],["dc.bibliographiccitation.volume","118"],["dc.contributor.author","Hilgartner, Roland"],["dc.contributor.author","Fichtel, Claudia"],["dc.contributor.author","Kappeler, Peter"],["dc.contributor.author","Zinner, Dietmar"],["dc.date.accessioned","2017-09-07T11:47:01Z"],["dc.date.available","2017-09-07T11:47:01Z"],["dc.date.issued","2012"],["dc.description.abstract","Pair-living and a monogamous mating strategy are rare and theoretically unexpected among mammals. Nevertheless, about 10% of primate species exhibit such a social system, which is difficult to explain in the absence of paternal care. In this study, we investigated the two major hypotheses proposed to explain the evolution of monogamy in mammals, the female defence hypothesis (FDH) and the resource defence hypothesis (RDH), in red-tailed sportive lemurs (Lepilemur ruficaudatus), a nocturnal primate from Madagascar. We analysed behavioural data from eight male–female pairs collected during a 24-mo field study to illuminate the determinants of pair-living in this species. Male and female L. ruficaudatus were found to live in dispersed pairs, which are characterised by low cohesion and low encounter rates within a common home range. Social interactions between pair partners were mainly agonistic and characterised by a complete absence of affiliative interactions – body contact was only observed during mating. During the short annual mating season, males exhibited elevated levels of aggression towards mates, as well as extensive mate guarding and increased locomotor activity. In addition, males were exclusively responsible for the maintenance of proximity between pair partners during this period, and they defended their territories against neighbouring males but not against females. Together, these results point towards the importance of female defence in explaining pair-living in L. ruficaudatus. We discuss the spatial and temporal distribution of receptive females in relation to the female defence strategies of males and suggest possible costs that prevent male red-tailed sportive lemurs from defending more than one female."],["dc.identifier.doi","10.1111/j.1439-0310.2012.02033.x"],["dc.identifier.gro","3150574"],["dc.identifier.pmid","23144523"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9480"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7350"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","0179-1613"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Determinants of Pair-Living in Red-Tailed Sportive Lemurs (Lepilemur ruficaudatus)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1383"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","International Journal of Primatology"],["dc.bibliographiccitation.lastpage","1396"],["dc.bibliographiccitation.volume","32"],["dc.contributor.author","Fichtel, Claudia"],["dc.contributor.author","Zucchini, Walter"],["dc.contributor.author","Hilgartner, Roland"],["dc.date.accessioned","2017-09-07T11:47:05Z"],["dc.date.available","2017-09-07T11:47:05Z"],["dc.date.issued","2011"],["dc.description.abstract","Many animals are organized into social groups and have to synchronize their activities to maintain group cohesion. Although activity budgets, habitat constraints, and group properties may impact on behavioural synchrony, little is known regarding how members of a group reach a consensus on the timing of activities such as foraging bouts. Game theory predicts that pair partners should synchronize their activities when there is an advantage of foraging together. As a result of this synchronization, differences in the energetic reserves of the two players develop spontaneously and the individual with lower reserves emerges as a pacemaker of the synchrony. Here, we studied the behavioral synchrony of pair-living, nocturnal, red-tailed sportive lemurs (Lepilemur ruficaudatus). We observed 8 pairs continuously for ≥1 annual reproductive cycle in Kirindy Forest, Western Madagascar. During focal observations, one observer followed the female of a pair and, simultaneously, another observer followed the male. We recorded the location and behavioral state of the focal individual every 5 min via instantaneous sampling. Although behavioral synchrony of pair partners appeared to be due mainly to endogenous activity patterns, they actively synchronized when they were in visual contact (<10 m). Nevertheless, red-tailed sportive lemurs benefit from synchronizing their activity only for 15% of the time, when they are close together. The lack of an early warning system for predators and weak support for benefits via social information transfer in combination with energetic constraints may explain why red-tailed sportive lemurs do not spend more time together and thus reap the benefits of behavioral synchrony."],["dc.identifier.doi","10.1007/s10764-011-9551-6"],["dc.identifier.gro","3150613"],["dc.identifier.pmid","22207772"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7163"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7390"],["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.subject","Behavioral synchrony; Coordination; Red-tailed sportive lemurs; Sociality"],["dc.title","Out of Sight but Not Out of Mind? Behavioral Coordination in Red-Tailed Sportive Lemurs (Lepilemur ruficaudatus)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","207"],["dc.bibliographiccitation.lastpage","304"],["dc.contributor.author","Fichtel, Claudia"],["dc.contributor.author","Hilgartner, Roland"],["dc.contributor.editor","Masters, Judith"],["dc.contributor.editor","Gamba, Marco"],["dc.contributor.editor","Génin, Fabien"],["dc.date.accessioned","2017-09-07T11:47:03Z"],["dc.date.available","2017-09-07T11:47:03Z"],["dc.date.issued","2012"],["dc.description.abstract","Although the number of pair-living species is higher in nocturnal than in diurnal primates, less is known about the communicative function of their vocalizations. One striking feature of vocal communication in diurnal pair-living primates is that partners exchange vocalizations in coordinated duets. Several functions have been attributed to duets, including mate attraction, advertizing and strengthening the pair bond, and territorial defense. To assess whether these functions can also be attributed to vocalizations of pair-living nocturnal primates, we studied the communicative function of vocalizations of red-tailed sportive lemurs (Lepilemur ruficaudatus). Social interactions between partners were equally often accompanied by vocal exchanges or not. Half of these vocal interactions included mutual but not coordinated exchanges of vocalizations between partners. In addition, playback experiments with vocalizations of the respective partner did not elicit vocal responses. Thus, exchanges of vocalizations might function to regulate spacing and interactions within pairs rather than to advertize or strengthen pair bonds. Since Lepilemur ruficaudatus interacted more often vocally with partners than with neighbors, and also vocalized when alone, we conclude that calling serves to signal an animal’s presence in its territory and to regulate spacing among conspecifics. Because vocalizations seem to serve in territorial defense in most nocturnal pair-living primates, cohesiveness between partners may have been the initial driving force behind the evolution of duets."],["dc.identifier.doi","10.1007/978-1-4614-4511-1_33"],["dc.identifier.gro","3150602"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7379"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","Springer"],["dc.publisher.place","New York, NY"],["dc.relation.crisseries","Developments in Primatology"],["dc.relation.doi","10.1007/978-1-4614-4511-1"],["dc.relation.isbn","978-1-4614-4510-4"],["dc.relation.ispartof","Leaping Ahead"],["dc.relation.ispartofseries","Developments in Primatology: Progress and Prospects"],["dc.title","Noises in the Dark: Vocal Communication in Lepilemur ruficaudatus and Other Nocturnal Pair-Living Primates"],["dc.type","book_chapter"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]