Dammhahn, Melanie

[["dc.bibliographiccitation.firstpage","473"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Oecologia"],["dc.bibliographiccitation.lastpage","483"],["dc.bibliographiccitation.volume","157"],["dc.contributor.author","Dammhahn, Melanie"],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2017-09-07T11:48:22Z"],["dc.date.available","2017-09-07T11:48:22Z"],["dc.date.issued","2008"],["dc.description.abstract","Understanding the co-occurrence of ecologically similar species remains a puzzling issue in community ecology. The species-rich mouse lemurs (Microcebus spec.) are distributed over nearly all remaining forest areas of Madagascar with a high variability in species distribution patterns. Locally, many congeneric species pairs seem to co-occur, but only little detailed information on spatial patterns is available. Here, we present the results of an intensive capture–mark–recapture study of sympatric Microcebus berthae and M. murinus populations that revealed small-scale mutual spatial exclusion. Nearest neighbour analysis indicated a spatial aggregation in Microcebus murinus but not in M. berthae. Although the diet of both species differed in proportions of food categories, they used the same food sources and had high feeding niche overlap. Also, forest structure related to the spatial distribution of main food sources did not explain spatial segregation because parts used by each species exclusively did not differ in density of trees, dead wood and lianas. We propose that life history trade-offs that result in species aggregation and a relative increase in the strength of intra-specific over inter-specific competition best explain the observed pattern of co-occurrence of ecologically similar congeneric Microcebus species."],["dc.identifier.doi","10.1007/s00442-008-1079-x"],["dc.identifier.gro","3150794"],["dc.identifier.pmid","18574599"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/3065"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7585"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","0029-8549"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Small-scale coexistence of two mouse lemur species (Microcebus berthae and M. murinus) within a homogeneous competitive environment"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","599"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Animal Cognition"],["dc.bibliographiccitation.lastpage","609"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","Lührs, Mia-Lana"],["dc.contributor.author","Dammhahn, Melanie"],["dc.contributor.author","Kappeler, Peter"],["dc.contributor.author","Fichtel, Claudia"],["dc.date.accessioned","2017-09-07T11:48:34Z"],["dc.date.available","2017-09-07T11:48:34Z"],["dc.date.issued","2009"],["dc.description.abstract","Wild animals face the challenge of locating feeding sites distributed across broad spatial and temporal scales. Spatial memory allows animals to find a goal, such as a productive feeding patch, even when there are no goal-specific sensory cues available. Because there is little experimental information on learning and memory capabilities in free-ranging primates, the aim of this study was to test whether grey mouse lemurs (Microcebus murinus), as short-term dietary specialists, rely on spatial memory in relocating productive feeding sites. In addition, we asked what kind of spatial representation might underlie their orientation in their natural environment. Using an experimental approach, we set eight radio-collared grey mouse lemurs a memory task by confronting them with two different spatial patterns of baited and non-baited artificial feeding stations under exclusion of sensory cues. Positional data were recorded by focal animal observations within a grid system of small foot trails. A change in the baiting pattern revealed that grey mouse lemurs primarily used spatial cues to relocate baited feeding stations and that they were able to rapidly learn a new spatial arrangement. Spatially concentrated, non-random movements revealed preliminary evidence for a route-based restriction in mouse lemur space; during a subsequent release experiment, however, we found high travel efficiency in directed movements. We therefore propose that mouse lemur spatial memory is based on some kind of mental representation that is more detailed than a route-based network map."],["dc.identifier.doi","10.1007/s10071-009-0219-y"],["dc.identifier.gro","3150855"],["dc.identifier.pmid","19263100"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/3567"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7649"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","1435-9448"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject","Spatial cognition; Topological map; Euclidean map; Correlated random walk; Goal-directed movement; Microcebus murinus"],["dc.title","Spatial memory in the grey mouse lemur (Microcebus murinus)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","379"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Journal of Ethology"],["dc.bibliographiccitation.lastpage","383"],["dc.bibliographiccitation.volume","28"],["dc.contributor.author","Luehrs, Mia-Lana"],["dc.contributor.author","Dammhahn, Melanie"],["dc.date.accessioned","2018-11-07T08:43:36Z"],["dc.date.available","2018-11-07T08:43:36Z"],["dc.date.issued","2010"],["dc.description.abstract","Cooperative hunting has been documented for several group-living carnivores and had been invoked as either the cause or the consequence of sociality. We report the first detailed observation of cooperative hunting for a solitary species, the Malagasy fossa (Cryptoprocta ferox). We observed a 45 min hunt of a 3 kg arboreal primate by three male fossas. The hunters changed roles during the hunt and subsequently shared the prey. We hypothesize that social hunting in fossas could have either evolved to take down recently extinct larger lemur prey, or that it could be a by-product of male sociality that is beneficial for other reasons."],["dc.identifier.doi","10.1007/s10164-009-0190-8"],["dc.identifier.isi","000277469300021"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6779"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/20010"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.publisher.place","Tokyo"],["dc.relation.issn","0289-0771"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","An unusual case of cooperative hunting in a solitary carnivore"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","229"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Immunogenetics"],["dc.bibliographiccitation.lastpage","245"],["dc.bibliographiccitation.volume","67"],["dc.contributor.author","Pechouskova, Eva"],["dc.contributor.author","Dammhahn, Melanie"],["dc.contributor.author","Brameier, Markus"],["dc.contributor.author","Fichtel, Claudia"],["dc.contributor.author","Kappeler, Peter"],["dc.contributor.author","Huchard, Elise"],["dc.date.accessioned","2017-09-07T11:47:00Z"],["dc.date.available","2017-09-07T11:47:00Z"],["dc.date.issued","2015"],["dc.description.abstract","The polymorphism of immunogenes of the major histocompatibility complex (MHC) is thought to influence the functional plasticity of immune responses and, consequently, the fitness of populations facing heterogeneous pathogenic pressures. Here, we evaluated MHC variation (allelic richness and divergence) and patterns of selection acting on the two highly polymorphic MHC class II loci (DRB and DQB) in the endangered primate Madame Berthe's mouse lemur (Microcebus berthae). Using 454 pyrosequencing, we examined MHC variation in a total of 100 individuals sampled over 9 years in Kirindy Forest, Western Madagascar, and compared our findings with data obtained previously for its sympatric congener, the grey mouse lemur (Microcebus murinus). These species exhibit a contrasting ecology and demography that were expected to affect MHC variation and molecular signatures of selection. We found a lower allelic richness concordant with its low population density, but a similar level of allelic divergence and signals of historical selection in the rare feeding specialist M. berthae compared to the widespread generalist M. murinus. These findings suggest that demographic factors may exert a stronger influence than pathogen-driven selection on current levels of allelic richness in M. berthae. Despite a high sequence similarity between the two congeners, contrasting selection patterns detected at DQB suggest its potential functional divergence. This study represents a first step toward unravelling factors influencing the adaptive divergence of MHC genes between closely related but ecologically differentiated sympatric lemurs and opens new questions regarding potential functional discrepancy that would explain contrasting selection patterns detected at DQB."],["dc.identifier.doi","10.1007/s00251-015-0827-4"],["dc.identifier.gro","3150569"],["dc.identifier.pmid","25687337"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11625"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7345"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","0093-7711"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject","Primates; Cheirogaleidae; Microcebus berthae; 454 pyrosequencing"],["dc.title","MHC class II variation in a rare and ecological specialist mouse lemur reveals lower allelic richness and contrasting selection patterns compared to a generalist and widespread sympatric congener"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","939"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Behavioral Ecology and Sociobiology"],["dc.bibliographiccitation.lastpage","952"],["dc.bibliographiccitation.volume","63"],["dc.contributor.author","Dammhahn, Melanie"],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2017-09-07T11:48:56Z"],["dc.date.available","2017-09-07T11:48:56Z"],["dc.date.issued","2009"],["dc.description.abstract","The socio-ecological model (SEM) links ecological factors with characteristics of social systems and allows predictions about the relationships between resource distribution, type of competition and social organisation. It has been mainly applied to group-living species but ought to explain variation in social organisation of solitary species as well. The aim of this study was to test basic predictions of the SEM in two solitary primates, which differ in two characteristics of female association patterns: (1) spatial ranging and (2) sleeping associations. Beginning in August 2002, we regularly (re-)captured and marked individuals of sympatric populations of Madame Berthe's and grey mouse lemurs (Microcebus berthae, Microcebus murinus) in Kirindy Forest (Madagascar). We recorded data on spatial patterns, feeding and social behaviour by means of direct observation of radio-collared females. The major food sources of M. berthae occurred in small dispersed patches leading to strong within-group scramble competition and over-dispersed females with a low potential for female associations. In contrast, M. murinus additionally used patchily distributed, high-quality (large) resources facilitating within-group contest competition. The combined influence of less strong within-group scramble and contest as well as between-group contest over non-food resources allowed females of this species to cluster in space. Additionally, we experimentally manipulated the spatial distribution of food sources and found that females adjusted their spatial patterns to food resource distribution. Thus, our results support basic predictions of the SEM and demonstrated that it can also explain variation in social organisation of solitary foragers."],["dc.identifier.doi","10.1007/s00265-009-0737-2"],["dc.identifier.gro","3150905"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/3495"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7704"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","0340-5443"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Females go where the food is: does the socio-ecological model explain variation in social organisation of solitary foragers?"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]