Schnoell, Anna Viktoria

[["dc.bibliographiccitation.firstpage","106"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Folia Primatologica"],["dc.bibliographiccitation.lastpage","116"],["dc.bibliographiccitation.volume","86"],["dc.contributor.author","Kittler, Klara"],["dc.contributor.author","Schnoell, Anna Viktoria"],["dc.contributor.author","Fichtel, Claudia"],["dc.date.accessioned","2018-02-09T10:57:56Z"],["dc.date.available","2018-02-09T10:57:56Z"],["dc.date.issued","2015"],["dc.description.abstract","In order to better understand the evolution of cognitive abilities in primates, information on cognitive traits of the most basal living primates can provide important comparative baseline data. Compared to haplorhine primates, lemurs have relatively smaller brains and reduced abilities to solve problems in the technical and social domain. However, recent studies have suggested that some cognitive abilities of lemurs are qualitatively equal to those of haplorhines. Here, we review studies investigating cognitive abilities in the technical and social domain of ring-tailed lemur cognition. In the physical domain, ring-tailed lemurs exhibit similar qualitative cognitive skills as other lemurs but also haplorhine primates. In the social domain, ring-tailed lemurs appear to be more skilled in visual perspective taking than other lemurs. Compared to other lemurs, they also have highly elaborated communicative skills. Moreover, within-group coalitions have been observed in female ring-tailed lemurs during rare events of female evictions but not in other lemur species. However, in several other aspects of social cognition, such as reconciliation and social learning, ring-tailed lemurs' cognitive abilities are equal to those of other lemurs. Thus, additional systematic comparative studies in physical and social cognition are required for a more comprehensive understanding of the processes of cognitive evolution among primates."],["dc.identifier.doi","10.1159/000368669"],["dc.identifier.pmid","26022306"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/12088"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.eissn","1421-9980"],["dc.title","Cognition in ring-tailed lemurs"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","61"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","American Journal of Physical Anthropology"],["dc.bibliographiccitation.lastpage","67"],["dc.bibliographiccitation.volume","153"],["dc.contributor.author","Schnoell, Anna Viktoria"],["dc.contributor.author","Hübner, Franziska"],["dc.contributor.author","Kappeler, Peter"],["dc.contributor.author","Fichtel, Claudia"],["dc.date.accessioned","2017-09-07T11:47:05Z"],["dc.date.available","2017-09-07T11:47:05Z"],["dc.date.issued","2014"],["dc.description.abstract","The dominant use of one hand is a striking feature of humans, but manual lateralization can be found in a variety of other species as well. In primates, the lateralization in hand use varies among species and several theories such as the \"postural origin,\" \"task complexity,\" or \"development theory\" have been suggested to explain this variation. In order to contribute comparative data on this phenomenon from a basal primate, we studied manual lateralization in wild redfronted lemurs (Eulemur rufifrons). Data were collected on four groups at Kirindy Forest, western Madagascar, during spontaneous actions and by confronting them with artificial feeding boxes. The lemurs did not exhibit manual lateralization on a group level in either condition. More individuals showed a hand preference in the experimental task, and the preferences were stronger compared to spontaneous actions. The direction of individual hand preferences was not consistent across the two conditions. The results of this study show that measuring manual laterality in different contexts can yield different results. Manual lateralization in wild redfronted lemurs therefore seems to be flexible and situation dependent and probably not ecologically relevant in their natural habitat."],["dc.identifier.doi","10.1002/ajpa.22403"],["dc.identifier.gro","3150596"],["dc.identifier.pmid","24318942"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7373"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0002-9483"],["dc.subject","hand use; handedness; strepsirrhine"],["dc.title","Manual lateralization in wild redfronted lemurs (Eulemur rufifrons) during spontaneous actions and in an experimental task"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","505"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Animal Cognition"],["dc.bibliographiccitation.lastpage","516"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","Schnoell, Anna Viktoria"],["dc.contributor.author","Fichtel, Claudia"],["dc.date.accessioned","2017-09-07T11:47:03Z"],["dc.date.available","2017-09-07T11:47:03Z"],["dc.date.issued","2012"],["dc.description.abstract","Recent research has claimed that traditions are not a unique feature of human culture, but that they can be found in animal societies as well. However, the origins of traditions in animals studied in the wild are still poorly understood. To contribute comparative data to begin filling this gap, we conducted a social diffusion experiment with four groups of wild redfronted lemurs (Eulemur rufifrons). We used a ‘two-option’ feeding box, where these Malagasy primates could either pull or push a door to get access to a fruit reward to study whether and how these two behavioural traits spread through the groups. During a pre-training phase, two groups were presented with boxes in which one technique was blocked, whereas two groups were presented with unblocked boxes. During a subsequent unconstrained phase, all four groups were confronted with unblocked boxes. Nearly half of the study animals were able to learn the new feeding skill and individuals who observed others needed fewer unsuccessful task manipulations until their first successful action. Animals in the two groups with pre-training also discovered the corresponding alternative technique but preferred the seeded technique. Interestingly, animals in the two groups without pre-training discovered both techniques, and one group developed a group preference for one technique whereas the other did not. In all groups, some animals also scrounged food rewards. In conclusion, redfronted lemurs appear to use social information in acquiring a novel task, and animals in at least in one group without training developed a group preference for one technique, indicating that they have the potential to develop behavioural traditions and conformity."],["dc.identifier.doi","10.1007/s10071-012-0477-y"],["dc.identifier.gro","3150585"],["dc.identifier.pmid","22426747"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8108"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7361"],["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","Eulemur rufifrons; Traditions; Conformity; Directed social learning; Culture; Scrounging"],["dc.title","Wild redfronted lemurs (Eulemur rufifrons) use social information to learn new foraging techniques"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","45"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Animal Cognition"],["dc.bibliographiccitation.lastpage","54"],["dc.bibliographiccitation.volume","17"],["dc.contributor.author","Schnoell, Anna Viktoria"],["dc.contributor.author","Dittmann, Marie T."],["dc.contributor.author","Fichtel, Claudia"],["dc.date.accessioned","2017-09-07T11:47:06Z"],["dc.date.available","2017-09-07T11:47:06Z"],["dc.date.issued","2014"],["dc.description.abstract","Behavioural traditions have only been described for a small subset of species, and the factors responsible for the maintenance of traditions over time are unclear. Redfronted lemurs are known to learn socially but traditions have not been described in the wild. We conducted a social diffusion experiment over three experimental years with artificial feeding boxes that could be opened in two different ways (pushing or pulling a door). Six out of 14 individuals that participated in at least 2 years exhibited a stable preference: five lemurs maintained a pull and one lemur a push preference, suggesting that habit formation and reinforcement learning may have lead to preferences over time. The remaining individuals exhibited fluctuating preferences and switched between showing a preference or no preference, but never switched between preferences. This instability might have been due to the low level of difficulty and/or the low object specificity of the task. The majority of lemurs additionally scrounged. Scrounging was not influenced by age, sex or success in manipulating the boxes. Thus, redfronted lemurs appear to use the two techniques flexibly but also scrounged opportunistically to get access to the rewards, indicating that traditions might be stabilized by multiple factors."],["dc.identifier.doi","10.1007/s10071-013-0636-9"],["dc.identifier.gro","3150607"],["dc.identifier.pmid","23670214"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10247"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7383"],["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","Stability of traditions; Social learning; Scrounging; Long-term study; Wild lemurs; Eulemur rufifrons"],["dc.title","Human-introduced long-term traditions in wild redfronted lemurs?"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","7600"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Scientific Reports"],["dc.bibliographiccitation.volume","4"],["dc.contributor.author","Pasquaretta, Cristian"],["dc.contributor.author","Levé, Marine"],["dc.contributor.author","Claidière, Nicolas"],["dc.contributor.author","van de Waal, Erica"],["dc.contributor.author","Whiten, Andrew"],["dc.contributor.author","MacIntosh, Andrew J. J."],["dc.contributor.author","Pelé, Marie"],["dc.contributor.author","Bergstrom, Mackenzie L."],["dc.contributor.author","Borgeaud, Christèle"],["dc.contributor.author","Brosnan, Sarah F."],["dc.contributor.author","Crofoot, Margaret C."],["dc.contributor.author","Fedigan, Linda M."],["dc.contributor.author","Fichtel, Claudia"],["dc.contributor.author","Hopper, Lydia M."],["dc.contributor.author","Mareno, Mary Catherine"],["dc.contributor.author","Petit, Odile"],["dc.contributor.author","Schnoell, Anna Viktoria"],["dc.contributor.author","Sorrentino, Eugenia Polizzi di"],["dc.contributor.author","Thierry, Bernard"],["dc.contributor.author","Tiddi, Barbara"],["dc.contributor.author","Sueur, Cédric"],["dc.date.accessioned","2017-09-07T11:47:01Z"],["dc.date.available","2017-09-07T11:47:01Z"],["dc.date.issued","2014"],["dc.description.abstract","Network optimality has been described in genes, proteins and human communicative networks. In the latter, optimality leads to the efficient transmission of information with a minimum number of connections. Whilst studies show that differences in centrality exist in animal networks with central individuals having higher fitness, network efficiency has never been studied in animal groups. Here we studied 78 groups of primates (24 species). We found that group size and neocortex ratio were correlated with network efficiency. Centralisation (whether several individuals are central in the group) and modularity (how a group is clustered) had opposing effects on network efficiency, showing that tolerant species have more efficient networks. Such network properties affecting individual fitness could be shaped by natural selection. Our results are in accordance with the social brain and cultural intelligence hypotheses, which suggest that the importance of network efficiency and information flow through social learning relates to cognitive abilities."],["dc.format.extent","8"],["dc.identifier.doi","10.1038/srep07600"],["dc.identifier.gro","3150575"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11932"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7351"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","2045-2322"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Social networks in primates: smart and tolerant species have more efficient networks"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","unknown"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","371"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Primates"],["dc.bibliographiccitation.lastpage","375"],["dc.bibliographiccitation.volume","54"],["dc.contributor.author","Schnoell, Anna Viktoria"],["dc.contributor.author","Fichtel, Claudia"],["dc.date.accessioned","2017-09-07T11:47:03Z"],["dc.date.available","2017-09-07T11:47:03Z"],["dc.date.issued","2013"],["dc.description.abstract","Reports on behavioural innovations in wild primate populations as well as on their transmission are rare. Here, we report observations suggesting that redfronted lemurs (Eulemur rufifrons) invent new behaviours in the wild. We observed a novel feeding behaviour in redfronted lemurs in Kirindy Forest, western Madagascar. The feeding behaviour consisted of depletion of nests of a social spider species (Stegodyphus sp.). The behaviour was observed in only one out of four study groups, although spider nests were present in the home ranges of all four groups. The behaviour was exhibited in three different years (2009, 2011, 2012) and appears to be re-invented from time to time. Interestingly, in 2011 this behaviour was shown by four individuals and probably spread within the group. This feeding behaviour has only been observed between the middle of June and early August (i.e. the early dry season), and nests were found to be empty later on, suggesting that these nests are available as a food source only seasonally. Our observation contributes a rare case of behavioural innovations in a wild primate population."],["dc.identifier.doi","10.1007/s10329-013-0356-4"],["dc.identifier.gro","3150583"],["dc.identifier.pmid","23661028"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7360"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0032-8332"],["dc.subject","Innovations; Traditions; Eulemur rufifrons; Stegodyphus sp.; Feeding behaviour; Social transmission"],["dc.title","A novel feeding behaviour in wild redfronted lemurs (Eulemur rufifrons): depletion of spider nests"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","65"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Ethology"],["dc.bibliographiccitation.lastpage","73"],["dc.bibliographiccitation.volume","124"],["dc.contributor.author","Fichtel, Claudia"],["dc.contributor.author","Schnoell, Anna Viktoria"],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2018-02-09T08:52:18Z"],["dc.date.available","2018-02-09T08:52:18Z"],["dc.date.issued","2018"],["dc.description.abstract","Social tolerance crucially affects the life of group-living animals as it can influence, among other things, their competitive regimes, access to food, learning behavior, and recruitment. However, social tolerance tests were mainly conducted in semi-free or captive populations, and we know little about the behavioral mechanisms and consequences of social tolerance under natural conditions. We therefore developed a co-feeding experiment to measure social tolerance in groups of wild and captive animals across two primate species. Specifically, we recorded the social tolerance level of redfronted lemurs (Eulemur rufifrons, four wild, one captive group) and ringtailed lemurs (Lemur catta, three wild, three captive groups) by presenting a clumped food resource in an experimental arena, and recorded patterns of resource use during the experiment. Because redfronted lemurs exhibit lower levels of decided conflicts than ringtailed lemurs, we predicted that they would be socially more tolerant. The probability for an individual to feed in the arena was higher in redfronted lemurs than in ringtailed lemurs. In addition, in both species, the probability for an individual to feed in the arena was higher in the captive populations than in their wild counterparts, suggesting that proximate factors, such as a relaxation of feeding competition in captivity, may adapt species-specific levels of social tolerance to local levels of food availability. Hence, the number of individuals co-feeding on a valuable food resource appears to be a useful proxy of social tolerance that could be measured with this experimental setup in other wild and captive species as well."],["dc.identifier.doi","10.1111/eth.12706"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/12085"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Measuring social tolerance: An experimental approach in two lemurid primates"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","30"],["dc.bibliographiccitation.journal","Lemur News"],["dc.bibliographiccitation.lastpage","32"],["dc.bibliographiccitation.volume","16"],["dc.contributor.author","Schnoell, A. V."],["dc.contributor.author","Fichtel, Claudia"],["dc.date.accessioned","2017-11-13T13:59:32Z"],["dc.date.available","2017-11-13T13:59:32Z"],["dc.date.issued","2012"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/9937"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Predation on redfronted lemurs (Eulemur rufifrons) by fossas (Cryptoprocta ferox)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]