Fischer, Julia

[["dc.bibliographiccitation.firstpage","947"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","International Journal of Primatology"],["dc.bibliographiccitation.lastpage","960"],["dc.bibliographiccitation.volume","28"],["dc.contributor.author","Ey, Elodie"],["dc.contributor.author","Hammerschmidt, Kurt"],["dc.contributor.author","Seyfarth, Robert M."],["dc.contributor.author","Fischer, Julia"],["dc.date.accessioned","2018-03-08T09:22:21Z"],["dc.date.available","2018-03-08T09:22:21Z"],["dc.date.issued","2007"],["dc.description.abstract","Changes in vocalizations during ontogeny can in principle be related to three factors: growth, maturation, and experience, i.e., learning. While learning is a prerequisite for the proper development of speech, it hardly appears to play a role in the development of the species-typical vocal behavior of nonhuman primates. Nonetheless, subjects of different age and sex often exhibit prominent variation in the structure of their vocalizations. We investigated ontogenetic changes and the emergence of sex-related differences in the acoustic structure of Chacma baboon (Papio ursinus) clear calls. We recorded the vocalizations emitted by individuals separated from the rest of the group or from particular individuals, in a group of baboons in the Moremi Wildlife Reserve, Botswana. We analyzed calls from 58 baboons of both sexes and all age classes. While the structure of the call appeared to be fixed from birth, call duration, the distribution of energy, and the fundamental frequency of the calls, including modulation, varied with age and sex of the caller. We discuss how body size may explain the variations. Some of the variables exhibited a different profile of variation with age between the sexes, with significant differences becoming apparent around puberty. The emergence of these sexual differences may be explained by the onset of sexual dimorphism in body size and mass. To which degree the hormonal status contributes to variation in the calling remains to be investigated."],["dc.identifier.doi","10.1007/s10764-007-9139-3"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/12957"],["dc.language.iso","en"],["dc.notes.intern","GRO-Li-Import"],["dc.notes.status","final"],["dc.relation.doi","10.1007/s10764-007-9139-3"],["dc.relation.eissn","1573-8604"],["dc.relation.issn","0164-0291"],["dc.relation.issn","1573-8604"],["dc.title","Age- and Sex-Related Variations in Clear Calls of Papio ursinus"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","147"],["dc.bibliographiccitation.lastpage","176"],["dc.contributor.author","Cheney, Dorothy L."],["dc.contributor.author","Seyfarth, Robert M."],["dc.contributor.author","Fischer, Julia"],["dc.contributor.author","Beehner, Jacinta C."],["dc.contributor.author","Bergman, Thore J."],["dc.contributor.author","Johnson, S."],["dc.contributor.author","Kitchen, Dawn M."],["dc.contributor.author","Palombit, Ryne A."],["dc.contributor.author","Rendall, Drew"],["dc.contributor.author","Silk, Joan B."],["dc.contributor.editor","Swedell, Larissa"],["dc.contributor.editor","Leigh, Steven R."],["dc.date.accessioned","2018-03-08T09:22:22Z"],["dc.date.available","2018-03-08T09:22:22Z"],["dc.date.issued","2006"],["dc.description.abstract","Predation, food competition, and infanticide all negatively impact female reproductive success. Female dominance rank may mitigate these effects, if competitive exclusion allows high-ranking females to gain priority of access to critical food resources. It may also exacerbate them, if low-ranking females are forced to feed or rest in marginal habitats where they are at increased risk. In this chapter, we present data on reproduction, mortality, and female reproductive success from a 10-year study of free-ranging chacma baboons (Papio hamadryas ursinus) in the Okavango Delta of Botswana and examine the influence of predation, infanticide, and dominance rank on female reproductive success. Predation appeared to be the cause of most deaths among adult females and juveniles, whereas infanticide was the most likely cause of deaths among infants. Seasonality strongly affected both births and mortality: The majority of conceptions occurred during the period of highest rainfall. Mortality due to predation and infanticide was highest during the 3-month period when flooding was at its peak, most likely because the group was more constrained to move along predictable routes during this time. Those reproductive parameters most likely to be associated with superior competitive ability-interbirth interval and infant growth rates-conferred a slight fitness advantage on high-ranking females. This fitness advantage was counterbalanced, however, by the effects of infanticide and predation. Infanticide affected high- and low-ranking females more than middle-ranking females, while predation affected females of all ranks relatively equally. As a result, there were few rank-related differences in estimated female lifetime reproductive success."],["dc.identifier.doi","10.1007/978-0-387-33674-9_7"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/12962"],["dc.language.iso","en"],["dc.notes.intern","GRO-Li-Import"],["dc.notes.status","final"],["dc.publisher","Springer"],["dc.publisher.place","Boston, MA"],["dc.relation.crisseries","Developments in Primatology"],["dc.relation.doi","10.1007/978-0-387-33674-9_7"],["dc.relation.eisbn","978-0-387-33674-9"],["dc.relation.isbn","978-0-387-30688-9"],["dc.relation.isbn","978-0-387-33674-9"],["dc.relation.ispartof","Reproduction and Fitness in Baboons: Behavioral, Ecological, and Life History Perspectives"],["dc.relation.ispartofseries","Developments in Primatology: Progress and Prospects"],["dc.title","Reproduction, Mortality, and Female Reproductive Success in Chacma Baboons of the Okavango Delta, Botswana"],["dc.type","book_chapter"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","33"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Ethology"],["dc.bibliographiccitation.lastpage","54"],["dc.bibliographiccitation.volume","107"],["dc.contributor.author","Fischer, Julia"],["dc.contributor.author","Hammerschmidt, Kurt"],["dc.contributor.author","Cheney, Dorothy L."],["dc.contributor.author","Seyfarth, Robert M."],["dc.date.accessioned","2022-10-06T13:34:25Z"],["dc.date.available","2022-10-06T13:34:25Z"],["dc.date.issued","2001"],["dc.description.abstract","We studied variation in the loud barks of free-ranging female chacma baboons (Papio cynocephalus ursinus) with respect to context, predator type, and individuality over an 18-month period in the Moremi Game Reserve, Botswana. To examine acoustic differences in relation to these variables, we extracted a suite of acoustic parameters from digitized calls and applied discriminant function analyses. The barks constitute a graded continuum, ranging from a tonal, harmonically rich call into a call with a more noisy, harsh structure. Tonal barks are typically given when the signaler is at risk of losing contact with the group or when a mother and infant have become separated (contact barks). The harsher variants are given in response to large predators (alarm barks). However, there are also intermediate forms between the two subtypes which may occur in both situations. This finding is not due to an overlap of individuals' distinct distributions but can be replicated within individuals. Within the alarm bark category, there are significant differences between calls given in response to mammalian carnivores and those given in response to crocodiles. Again, there are intermediate variants. Both alarm call types are equally different from contact barks, indicating that the calls vary along different dimensions. Finally, there are consistent, significant differences among different individuals' calls. However, individual identity in one call type cannot directly be inferred from knowledge of the individuals' call characteristics in the other. In sum, the barks of female baboons potentially provide rich information to the recipients of these signals. The extent to which baboons discriminate between alarm and contact barks, and classify calls according to context and/or acoustic similarity will be described in a subsequent paper."],["dc.identifier.doi","10.1111/j.1439-0310.2001.00630.x"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/115901"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-602"],["dc.notes.status","final"],["dc.relation.eissn","1439-0310"],["dc.relation.issn","0179-1613"],["dc.relation.orgunit","Deutsches Primatenzentrum"],["dc.title","Acoustic Features of Female Chacma Baboon Barks"],["dc.title.subtitle","Chacma Baboon Barks"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e50989"],["dc.bibliographiccitation.journal","eLife"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Fischer, Julia"],["dc.contributor.author","Barrett, Louise"],["dc.contributor.author","Collins, Anthony"],["dc.contributor.author","Elton, Sarah"],["dc.contributor.author","Fagot, Joël"],["dc.contributor.author","Ferreira da Silva, Maria Joana"],["dc.contributor.author","Hammerschmidt, Kurt"],["dc.contributor.author","Henzi, Peter"],["dc.contributor.author","Knauf, Sascha"],["dc.contributor.author","Kopp, Gisela H"],["dc.contributor.author","Rogers, Jeffrey"],["dc.contributor.author","Roos, Christian"],["dc.contributor.author","Ross, Caroline"],["dc.contributor.author","Silk, Joan"],["dc.contributor.author","Snyder-Mackler, Noah"],["dc.contributor.author","Staedele, Veronika"],["dc.contributor.author","Swedell, Larissa"],["dc.contributor.author","Zinner, Dietmar"],["dc.contributor.author","Higham, James P."],["dc.contributor.author","Alberts, Susan C."],["dc.contributor.author","Beehner, Jacinta C."],["dc.contributor.author","Bergman, Thore J."],["dc.contributor.author","Carter, Alecia J."],["dc.contributor.author","Jolly, Clifford J."],["dc.contributor.author","Seyfarth, Robert M."],["dc.contributor.author","Wilson, Michael L."],["dc.date.accessioned","2020-12-10T18:48:08Z"],["dc.date.available","2020-12-10T18:48:08Z"],["dc.date.issued","2019"],["dc.description.abstract","Baboons, members of the genus Papio, comprise six closely related species distributed throughout sub-Saharan Africa and southwest Arabia. The species exhibit more ecological flexibility and a wider range of social systems than many other primates. This article summarizes our current knowledge of the natural history of baboons and highlights directions for future research. We suggest that baboons can serve as a valuable model for complex evolutionary processes, such as speciation and hybridization. The evolution of baboons has been heavily shaped by climatic changes and population expansion and fragmentation in the African savanna environment, similar to the processes that acted during human evolution. With accumulating long-term data, and new data from previously understudied species, baboons are ideally suited for investigating the links between sociality, health, longevity and reproductive success. To achieve these aims, we propose a closer integration of studies at the proximate level, including functional genomics, with behavioral and ecological studies."],["dc.identifier.doi","10.7554/eLife.50989"],["dc.identifier.eissn","2050-084X"],["dc.identifier.pmid","31711570"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16961"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/79034"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","2050-084X"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Insights into the evolution of social systems and species from baboon studies"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","100"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Hormones and Behavior"],["dc.bibliographiccitation.lastpage","110"],["dc.bibliographiccitation.volume","75"],["dc.contributor.author","Kalbitzer, Urs"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Cheney, Dorothy L."],["dc.contributor.author","Seyfarth, Robert M."],["dc.contributor.author","Fischer, Julia"],["dc.date.accessioned","2017-09-07T11:47:13Z"],["dc.date.available","2017-09-07T11:47:13Z"],["dc.date.issued","2015"],["dc.description.abstract","In multi-male, multi-female groups of mammals, males usually compete aggressively over access to females. However, species vary in the intensity of male contest competition, which has been linked to differences in testosterone and glucocorticoid profiles. Chacma (Papio ursinus) and Guinea (P. papio) baboons constitute an intriguing model to examine variation in male competition and male endocrine correlates, because of the differences in their social systems. Chacma baboons live in stable female-bonded groups with linear male dominance hierarchies and a high male mating skew, whereas Guinea baboons live in male-bonded, multi-level societies. We recorded male behavior and assayed testosterone (fT) and glucocorticoid metabolite (fGC) levels from fecal samples in one population of each species. Male chacma baboons were more frequently involved in agonistic interactions, and dominance relationships were more consistent than in Guinea baboons, where we could not detect linear hierarchies. Notably, male chacma baboons were also more aggressive towards females, indicating an overall higher aggressiveness in this species. In contrast, male Guinea baboons showed higher levels of affiliative interactions and spatial tolerance. High-ranking and consorting male chacma baboons showed elevated fGC levels and also tended to show elevated fT levels, but there was no effect of consortship in Guinea baboons. Agonism was not related to hormone levels in either species. Thus, predictors of fT and fGC levels in Guinea baboons seem to differ from chacma baboons. Our results support the view that different social systems create differential selection pressures for male aggression, reflected by different hormone profiles."],["dc.identifier.doi","10.1016/j.yhbeh.2015.08.013"],["dc.identifier.gro","3150657"],["dc.identifier.pmid","26344413"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/12728"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7437"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","0018-506X"],["dc.rights","CC BY-NC-ND 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by-nc-nd/4.0"],["dc.subject","Aggression; Androgen; Competition; Cortisol; Dominance; Hierarchy; Papio; Primate; Stress; Tolerance"],["dc.title","Social behavior and patterns of testosterone and glucocorticoid levels differ between male chacma and Guinea baboons"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1465"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","The Journal of the Acoustical Society of America"],["dc.bibliographiccitation.lastpage","1474"],["dc.bibliographiccitation.volume","111"],["dc.contributor.author","Fischer, Julia"],["dc.contributor.author","Hammerschmidt, Kurt"],["dc.contributor.author","Cheney, Dorothy L."],["dc.contributor.author","Seyfarth, Robert M."],["dc.date.accessioned","2018-03-08T09:22:21Z"],["dc.date.available","2018-03-08T09:22:21Z"],["dc.date.issued","2002"],["dc.description.abstract","The acoustic structure of loud calls (“wahoos”) recorded from free-ranging male baboons (Papio cynocephalus ursinus) in the Moremi Game Reserve, Botswana, was examined for differences between and within contexts, using calls given in response to predators (alarm wahoos), during male contests (contest wahoos), and when a male had become separated from the group (contact wahoos). Calls were recorded from adolescent, subadult, and adult males. In addition, male alarm calls were compared with those recorded from females. Despite their superficial acoustic similarity, the analysis revealed a number of significant differences between alarm, contest, and contact wahoos. Contest wahoos are given at a much higher rate, exhibit lower frequency characteristics, have a longer “hoo” duration, and a relatively louder “hoo” portion than alarm wahoos. Contact wahoos are acoustically similar to contest wahoos, but are given at a much lower rate. Both alarm and contest wahoos also exhibit significant differences among individuals. Some of the acoustic features that vary in relation to age and sex presumably reflect differences in body size, whereas others are possibly related to male stamina and endurance. The finding that calls serving markedly different functions constitute variants of the same general call type suggests that the vocal production in nonhuman primates is evolutionarily constrained."],["dc.identifier.doi","10.1121/1.1433807"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/12954"],["dc.language.iso","en"],["dc.notes.intern","GRO-Li-Import"],["dc.notes.status","final"],["dc.relation.doi","10.1121/1.1433807"],["dc.relation.issn","0001-4966"],["dc.title","Acoustic features of male baboon loud calls: Influences of context, age, and individuality"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1825"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Behavioral Ecology and Sociobiology"],["dc.bibliographiccitation.lastpage","1835"],["dc.bibliographiccitation.volume","67"],["dc.contributor.author","Kitchen, Dawn M."],["dc.contributor.author","Cheney, Dorothy L."],["dc.contributor.author","Engh, A. L."],["dc.contributor.author","Fischer, J."],["dc.contributor.author","Moscovice, L. R."],["dc.contributor.author","Seyfarth, Robert M."],["dc.date.accessioned","2017-09-07T11:47:09Z"],["dc.date.available","2017-09-07T11:47:09Z"],["dc.date.issued","2013"],["dc.description.abstract","Among male chacma baboons (Papio hamadryas ursinus), rank positions in the dominance hierarchy are fiercely contested. Physical fighting is costly but relatively rare in this species. Instead, disputes are frequently resolved using displays that include loud, repetitive “wahoo” (two-syllable bark) vocalizations. We previously found that males of all ranks adjust their contest behavior based on the relative fighting ability of opponents and that length of the second syllable (“hoo” duration), calling rate, and fundamental frequency reliably indicate fighting ability. To test whether males indeed attend to hoo duration when assessing opponents, we designed two sets of playback experiments in which call sequence pairs were identical except for this single modified feature. In experiment 1, we used calls recorded from high-ranking males unfamiliar to all subjects. In experiment 2, callers were familiar rivals that ranked one position below subjects in the dominance hierarchy. In paired analyses, subjects in both experiments responded more strongly to sequences with more intense signal features (most commonly associated with high-quality males) compared to sequences with relatively less exaggerated features (most often associated with low-quality males). Results suggest that males can use acoustic features to both indirectly evaluate strangers and to monitor the changing condition of those rivals that present the biggest intragroup threat to their position in the dominance hierarchy. Taken together with our previous research, baboons appear to follow a classic assessor strategy—signal features related to rank and condition are salient to males and directly affect their propensity to respond to rivals."],["dc.identifier.doi","10.1007/s00265-013-1592-8"],["dc.identifier.gro","3150635"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7414"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0340-5443"],["dc.subject","Acoustic communication; Assessor strategy; Game theory; Intrasexual competition; Papio; Playback experiments"],["dc.title","Male baboon responses to experimental manipulations of loud “wahoo calls”: testing an honest signal of fighting ability"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","925"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Animal Behaviour"],["dc.bibliographiccitation.lastpage","931"],["dc.bibliographiccitation.volume","61"],["dc.contributor.author","Fischer, Julia"],["dc.contributor.author","Metz, Markus"],["dc.contributor.author","Cheney, Dorothy L."],["dc.contributor.author","Seyfarth, Robert M."],["dc.date.accessioned","2018-03-08T09:22:19Z"],["dc.date.available","2018-03-08T09:22:19Z"],["dc.date.issued","2001"],["dc.description.abstract","We studied chacma baboons', Papio cynocephalus ursinus, responses to conspecific ‘barks’ in a free-ranging population in the Okavango Delta of Botswana. These barks grade from tonal, harmonically rich calls to calls having a noisier, harsher structure. Tonal or clear barks are typically given when the signaller is at risk of losing contact with the group or when a mother and infant have become separated (‘contact barks’). The harsher variants are given in response to predators (‘alarm barks’). In both contexts, however, we also observed acoustically intermediate forms. Using the habituation–recovery method we tested whether baboons discriminated between (1) clear contact barks versus harsh alarm barks, and (2) clear contact barks versus intermediate alarm barks. Calls were selected according to the results of a discriminant function analysis conducted on a suite of acoustic parameters. In these experiments, animals showed a significant recovery of response only after playback of the harsh alarm call. We performed another set of experiments using single exemplars of clear and intermediate contact barks, or intermediate and harsh alarm barks. Animals responded only to the playback of a harsh alarm bark. Apparently, only this harsh variant was placed in a category that warranted a response. We hypothesize that baboons' responses were to a large degree influenced by their assessment of context."],["dc.identifier.doi","10.1006/anbe.2000.1687"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/12941"],["dc.language.iso","en"],["dc.notes.intern","GRO-Li-Import"],["dc.notes.status","final"],["dc.relation.doi","10.1006/anbe.2000.1687"],["dc.relation.issn","0003-3472"],["dc.title","Baboon responses to graded bark variants"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","140"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Behavioral Ecology and Sociobiology"],["dc.bibliographiccitation.lastpage","148"],["dc.bibliographiccitation.volume","56"],["dc.contributor.author","Fischer, Julia"],["dc.contributor.author","Kitchen, Dawn M."],["dc.contributor.author","Seyfarth, Robert M."],["dc.contributor.author","Cheney, Dorothy L."],["dc.date.accessioned","2018-03-08T09:22:21Z"],["dc.date.available","2018-03-08T09:22:21Z"],["dc.date.issued","2004"],["dc.description.abstract","Free-ranging adult male baboons give loud two-syllable ‘wahoo’ calls during dawn choruses, interactions between groups, when chasing females, and in aggressive interactions with other males. Previous research has shown that the rate and duration of these contest wahoos are correlated with a male’s competitive ability: high-ranking males call more often, call at faster rates, and call for longer bouts than do low-ranking males. Here we report that acoustic features of wahoos also reveal information about male competitive ability. High-ranking males give wahoos with higher fundamental frequencies (F0) and longer ‘hoo’ syllables. Within-subject analyses revealed that, as males fall in rank, the hoo syllables tend to shorten within a period of months. As males age and continue to fall in rank, F0 declines, hoo syllables shorten, and formant dispersion decreases. Independent of age and rank, within bouts of calling F0 declines and hoo syllables become shorter. Because wahoos are often given while males are running or leaping through trees, variation in these acoustic features may function as an indicator of a male’s stamina. The acoustic features of contest wahoos thus potentially allow listeners to assess a male’s competitive ability."],["dc.identifier.doi","10.1007/s00265-003-0739-4"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/12956"],["dc.language.iso","en"],["dc.notes.intern","GRO-Li-Import"],["dc.notes.status","final"],["dc.relation.doi","10.1007/s00265-003-0739-4"],["dc.relation.eissn","1432-0762"],["dc.relation.issn","0340-5443"],["dc.relation.issn","1432-0762"],["dc.title","Baboon loud calls advertise male quality: acoustic features and their relation to rank, age, and exhaustion"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","13220"],["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Scientific Reports"],["dc.bibliographiccitation.lastpage","11"],["dc.bibliographiccitation.volume","5"],["dc.contributor.author","Price, Tabitha"],["dc.contributor.author","Wadewitz, Philip"],["dc.contributor.author","Cheney, Dorothy L."],["dc.contributor.author","Seyfarth, Robert M."],["dc.contributor.author","Hammerschmidt, Kurt"],["dc.contributor.author","Fischer, Julia"],["dc.date.accessioned","2017-09-07T11:47:15Z"],["dc.date.available","2017-09-07T11:47:15Z"],["dc.date.issued","2015"],["dc.description.abstract","The alarm calls of vervet monkeys (Chlorocebus pygerythrus) constitute the classic textbook example of semantic communication in nonhuman animals, as vervet monkeys give acoustically distinct calls to different predators and these calls elicit appropriate responses in conspecifics. They also give similar sounding calls in aggressive contexts, however. Despite the central role the vervet alarm calls have played for understanding the evolution of communication, a comprehensive, quantitative analysis of the acoustic structure of these calls was lacking. We used 2-step cluster analysis to identify objective call types and discriminant function analysis to assess context specificity. Alarm calls given in response to leopards, eagles, and snakes could be well distinguished, while the inclusion of calls given in aggressive contexts yielded some overlap, specifically between female calls given to snakes, eagles and during aggression, as well as between male vervet barks (additionally recorded in South Africa) in leopard and aggressive contexts. We suggest that both cognitive appraisal of the situation and internal state contribute to the variation in call usage and structure. While the semantic properties of vervet alarm calls bear little resemblance to human words, the existing acoustic variation, possibly together with additional contextual information, allows listeners to select appropriate responses."],["dc.identifier.doi","10.1038/srep13220"],["dc.identifier.gro","3150665"],["dc.identifier.pmid","26286236"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/13627"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7446"],["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","Vervets revisited: A quantitative analysis of alarm call structure and context specificity"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]