Schülke, Oliver

[["dc.bibliographiccitation.firstpage","120"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Aggressive Behavior"],["dc.bibliographiccitation.lastpage","128"],["dc.bibliographiccitation.volume","45"],["dc.contributor.author","Paschek, Nicole"],["dc.contributor.author","Müller, Nadine"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Ostner, Julia"],["dc.contributor.author","Schülke, Oliver"],["dc.date.accessioned","2022-10-06T13:32:22Z"],["dc.date.available","2022-10-06T13:32:22Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1002/ab.21801"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/115354"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-602"],["dc.relation.issn","0096-140X"],["dc.relation.orgunit","Deutsches Primatenzentrum"],["dc.title","Subtypes of aggression and their relation to anxiety in Barbary macaques"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","907"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Behaviour"],["dc.bibliographiccitation.lastpage","934"],["dc.bibliographiccitation.volume","151"],["dc.contributor.author","Young, Christopher"],["dc.contributor.author","Ostner, Julia"],["dc.contributor.author","Schülke, Oliver"],["dc.date.accessioned","2017-09-07T11:54:40Z"],["dc.date.available","2017-09-07T11:54:40Z"],["dc.date.issued","2014"],["dc.description.abstract","In group living animals, there is pronounced variation in the formation and function of cooperation between males via coalitionary aggression. Pandit, van Schaik and colleagues developed a mathematical model to predict the evolution of different coalition types in group-living male primates, the PvS model. Coalitions are classified into five types dependent on the ranks of the participants and the function of the aggression. The main factor determining the coalition types expected to evolve is contest potential, an estimate of female monopolisability by individual males. We examined the model using groups of Assamese (Macaca assamensis) and Barbary macaques (Macaca sylvanus) to gain a full range of contest potentials. We observed, across groups, 393 coalitions during 3645 h of data collection. We measured contest potential on a species-specific basis dependent on the information males can infer about female reproductive state. By examining coalition formation in different populations and species, but also in the same groups over time, we showed the strengths and weaknesses of the PvS model. We discuss why our results do not fully fit the model’s predictions, including differing costs/benefits of coalition formation, such as delayed benefits via increased status, making rank-changing coalitions viable at mid–low contest potential. Alternative factors not considered by the model include the effect of male social bonds on coalition partner choice and the effect of female mate-choice on coalition target selection. Finally, we suggest possible improvements to the model and provide information on how best to test the current predictions of the PvS model."],["dc.identifier.doi","10.1163/1568539x-00003166"],["dc.identifier.gro","3151475"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8280"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0005-7959"],["dc.title","How males form coalitions against group rivals and the Pandit/van Schaik coalition model"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Chalise, Mukesh K."],["dc.contributor.author","Cooper, M."],["dc.contributor.author","Ostner, Julia"],["dc.contributor.author","Schülke, Oliver"],["dc.contributor.editor","Rowe, Noel"],["dc.contributor.editor","Myers, Marc"],["dc.date.accessioned","2017-11-13T15:37:14Z"],["dc.date.available","2017-11-13T15:37:14Z"],["dc.date.issued","2016"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/9950"],["dc.language.iso","en"],["dc.notes.status","new -primates"],["dc.publisher","Pogonias Press"],["dc.publisher.place","Charlestown"],["dc.relation.isbn","978-1-940496-05-4"],["dc.relation.isbn","978-1-940496-06-1"],["dc.relation.ispartof","All the World's Primates"],["dc.title","Assam Macaque (Macaca assamensis)"],["dc.type","book_chapter"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","39"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Ethology"],["dc.bibliographiccitation.lastpage","51"],["dc.bibliographiccitation.volume","119"],["dc.contributor.author","O, Claudio de la"],["dc.contributor.author","Mevis, Lieke"],["dc.contributor.author","Richter, Christin"],["dc.contributor.author","Malaivijitnond, Suchinda"],["dc.contributor.author","Ostner, Julia"],["dc.contributor.author","Schülke, Oliver"],["dc.date.accessioned","2017-09-07T11:54:44Z"],["dc.date.available","2017-09-07T11:54:44Z"],["dc.date.issued","2012"],["dc.description.abstract","Recent research has shown that social relationships may exert positive effects on fitness. Therefore, it is expected that animals make efforts to develop and preserve close social bonds. Reconciliation is a conflict resolution mechanism, which allows buffering the negative effects of aggressive conflict on social relationships. As socioecological theories claim that intrasexual competition and conflict-shaped social interactions among macaque males, postconflict behaviour should reflect the effects of these evolutionary forces. Here, we present the results of a study on a provisioned group of Macaca arctoides in Thailand focusing exclusively on male postconflict behaviour. Through an Information Theory–Model Selection approach, we evaluated the relative support for three predictions about the occurrence of reconciliation and the quality of the opponents' social relationships. The strength of the opponents' affiliative relationship was the only variable predicting reconciliation occurrence. This agrees with the main prediction of the valuable relationship hypothesis for the function and distribution of reconciliation, which states that the opponents sharing high-quality relationships are more likely to reconcile, and this interaction is aimed to repair the disturbing effects of previous aggression on their relationship. The conciliatory tendency found among these wild males is much lower than reported previously for this species from captive conditions, matching more closely the rates reported for species with an intolerant-despotic dominance style. The results offer strong support for the importance of developing and preserving valuable relationships, even among rather intolerant males."],["dc.identifier.doi","10.1111/eth.12034"],["dc.identifier.gro","3151478"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8283"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0179-1613"],["dc.title","Reconciliation in Male Stump-tailed Macaques (Macaca arctoides): Intolerant Males Care for Their Social Relationships"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","571"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","International Journal of Primatology"],["dc.bibliographiccitation.lastpage","584"],["dc.bibliographiccitation.volume","34"],["dc.contributor.author","Macdonald, Sally"],["dc.contributor.author","Schülke, Oliver"],["dc.contributor.author","Ostner, Julia"],["dc.date.accessioned","2017-09-07T11:54:42Z"],["dc.date.available","2017-09-07T11:54:42Z"],["dc.date.issued","2013"],["dc.description.abstract","Seyfarth’s model of social grooming proposes that by grooming females higher ranking than themselves, females can gain access to important rank-related benefits, such as agonistic support. This, in turn, produces a distinctive pattern of grooming in which females direct their grooming up the female dominance hierarchy and compete for access to the highest ranking individuals. We aimed to test to what extent the grooming behavior of female Assamese macaques (Macaca assamensis) fits the assumptions and predictions of Seyfarth’s model. During two 1-yr sampling periods (October 2007–September 2008, May 2010–April 2011) we collected >2100 focal hours of data from a single wild group in their natural habitat at Phu Khieo Wildlife Sanctuary, Thailand. Subjects included all adult female group members (N = 12 in 2007/8; N = 15 in 2010/11). We collected detailed data on grooming interactions, approaches, and departures as well as all aggressive and submissive behaviors between all subjects. We found no evidence that grooming was exchanged for rank-related benefits. In line with this we found no evidence that the grooming of female Assamese macaques fits the pattern predicted by Seyfarth’s model. These results are surprising given that such deviations from Seyfarth’s model are relatively rare among macaques. We propose that our findings are best explained as a lack of a need for rank-related benefits by females in this group."],["dc.identifier.doi","10.1007/s10764-013-9680-1"],["dc.identifier.gro","3151467"],["dc.identifier.pmid","23588998"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8271"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0164-0291"],["dc.title","The Absence of Grooming for Rank-Related Benefits in Female Assamese Macaques (Macaca assamensis)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1097"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Behavioral Ecology and Sociobiology"],["dc.bibliographiccitation.lastpage","1108"],["dc.bibliographiccitation.volume","68"],["dc.contributor.author","Sukmak, Manakorn"],["dc.contributor.author","Wajjwalku, Worawidh"],["dc.contributor.author","Ostner, Julia"],["dc.contributor.author","Schülke, Oliver"],["dc.date.accessioned","2017-09-07T11:54:33Z"],["dc.date.available","2017-09-07T11:54:33Z"],["dc.date.issued","2014"],["dc.description.abstract","In groups with multiple males, direct mate competition may select for the evolution of dominance hierarchies that sort males into a queue for access to fertile females. The priority-of-access (PoA) model proposed by Altmann in 1962 makes explicit predictions about the resulting paternity distribution based on an interaction between male dominance rank and the overlap of female receptive phases. Here, we investigated whether the logic of the PoA model predicted the distribution of paternity across ranks in a seasonal breeder with high reproductive synchrony over six consecutive mating seasons. We studied 18 males that resided in a group of wild Assamese macaques (Macaca assamensis) in their natural habitat at Phu Khieo Wildlife Sanctuary, Thailand, between 2006 and 2011 with 5 to 13 conceptions per season. We assessed whether mate guarding increased paternity success, described “short-term” deviations from predicted paternity distribution, and examined how these are related to the number of competitors and fertile females. We determined genetic paternity of 43 (93 %) offspring born into the study group and found reproductive skew to be relatively low with 29 % alpha male paternity in accordance with the high degree of female reproductive synchrony observed. Short-term deviations from expected paternity distribution over ranks were not explained by the number of resident males or the number of conceiving females or their interaction. Within the limits of this study, these results suggest that even if males cannot discern female fertile phases, if reproduction is seasonal, and if reproductive synchrony is high, males may also compete directly over access to females."],["dc.identifier.doi","10.1007/s00265-014-1721-z"],["dc.identifier.gro","3151444"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8246"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0340-5443"],["dc.title","Dominance rank, female reproductive synchrony, and male reproductive skew in wild Assamese macaques"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","872"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","American Journal of Primatology"],["dc.bibliographiccitation.lastpage","882"],["dc.bibliographiccitation.volume","78"],["dc.contributor.author","Haunhorst, Christine B."],["dc.contributor.author","Schülke, Oliver"],["dc.contributor.author","Ostner, Julia"],["dc.date.accessioned","2017-09-07T11:51:38Z"],["dc.date.available","2017-09-07T11:51:38Z"],["dc.date.issued","2016"],["dc.description.abstract","In large multimale–multifemale primate groups, individual adult males and females may form close social relationships that extend beyond the mating context, a surprising finding for polygynandrous mammals. The patterns of these associations can be relatively stable across time. Here we investigate whether dyadic social relationships between the sexes transcend mere association in wild Assamese macaques and may be characterized as strong, equitable, and stable affiliative relationships or social bonds. We collected >9,000 hr of focal animal data on adult males and females from two groups of wild Assamese macaques (Macaca assamensis) at Phu Khieo Wildlife Sanctuary, Thailand. Using dyadic composite sociality indices, we found male–female affiliative relationships to be highly differentiated. The stronger the relationships were, the more likely partners were to reciprocate grooming and the more stable were the relationships. In addition, the strongest dyadic relationships remained stable over multiple years as long as both partners remained in the group. These results indicate that in a polygynous species particular males and females form strong, equitable, and enduring affiliative relationships qualitatively similar to the same-sex bonds described for female baboons and male chimpanzees. Am. J. Primatol. 78:872–882, 2016."],["dc.identifier.doi","10.1002/ajp.22554"],["dc.identifier.gro","3151080"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7848"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0275-2565"],["dc.title","Opposite-sex social bonding in wild Assamese macaques"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2207"],["dc.bibliographiccitation.issue","24"],["dc.bibliographiccitation.journal","Current Biology"],["dc.bibliographiccitation.lastpage","2210"],["dc.bibliographiccitation.volume","20"],["dc.contributor.author","Schülke, Oliver"],["dc.contributor.author","Bhagavatula, Jyotsna"],["dc.contributor.author","Vigilant, Linda"],["dc.contributor.author","Ostner, Julia"],["dc.date.accessioned","2017-09-07T11:54:43Z"],["dc.date.available","2017-09-07T11:54:43Z"],["dc.date.issued","2010"],["dc.description.abstract","For animals living in mixed-sex social groups, females who form strong social bonds with other females live longer and have higher offspring survival [1–3]. These bonds are highly nepotistic, but sometimes strong bonds may also occur between unrelated females if kin are rare [2, 3] and even among postdispersal unrelated females in chimpanzees and horses [4, 5]. Because of fundamental differences between the resources that limit reproductive success in females (food and safety) and males (fertilizations), it has been predicted that bonding among males should be rare and found only for kin and among philopatric males [6] like chimpanzees [7–9]. We studied social bonds among dispersing male Assamese macaques (Macaca assamensis) to see whether males in multimale groups form differentiated social bonds and whether and how males derive fitness benefits from close bonds. We found that strong bonds were linked to coalition formation, which in turn predicted future social dominance, which influenced paternity success. The strength of males' social bonds was directly linked to the number of offspring they sired. Our results show that differentiated social relationships exert an important influence on the breeding success of both sexes that transcends contrasts in relatedness."],["dc.identifier.doi","10.1016/j.cub.2010.10.058"],["dc.identifier.gro","3151486"],["dc.identifier.pmid","21093261"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8292"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0960-9822"],["dc.title","Social Bonds Enhance Reproductive Success in Male Macaques"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","32"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Hormones and Behavior"],["dc.bibliographiccitation.lastpage","39"],["dc.bibliographiccitation.volume","63"],["dc.contributor.author","Young, Christopher"],["dc.contributor.author","Majolo, Bonaventura"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Schülke, Oliver"],["dc.contributor.author","Ostner, Julia"],["dc.date.accessioned","2017-09-07T11:54:35Z"],["dc.date.available","2017-09-07T11:54:35Z"],["dc.date.issued","2012"],["dc.description.abstract","In many cercopithecine primates females display probabilistic cues of fertility to indicate the periovulatory period to males. These cues may include female behaviour, acoustic signals, and morphological signs such as the anogenital swelling. However, the extent to which males can utilise this information varies between species. We describe male sexual behaviour in relation to changes in anogenital swelling size, timing of ovulation and female socio-sexual behaviour in wild Barbary macaques (Macaca sylvanus). We further compare male sexual behaviour during conception and post-conception cycles to evaluate if males differentiate between these qualitatively different cycle types. Our results show that during conception cycles male mating behaviour was concentrated around the fertile phase implying that males inferred information from more than swelling size alone. Male mating frequency increased in line with female socio-sexual behaviour, namely female presenting and the frequency of copulations with copulation calls. Most strikingly our results show that males invested equally in mating during fertile and non-fertile, i.e. post-conception, maximum swelling phases. Whether post-conception swellings were merely a result of changes in hormone concentrations during pregnancy or part of a female reproductive strategy remains elusive. In sum, this study adds to the body of research on the evolution of female sexual signals and how males may infer information from these cues."],["dc.identifier.doi","10.1016/j.yhbeh.2012.11.004"],["dc.identifier.gro","3151452"],["dc.identifier.pmid","23146839"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8255"],["dc.language.iso","en"],["dc.notes.status","public"],["dc.notes.submitter","chake"],["dc.relation.issn","0018-506X"],["dc.title","Male mating behaviour in relation to female sexual swellings, socio-sexual behaviour and hormonal changes in wild Barbary macaques"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","235"],["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","BMC Evolutionary Biology"],["dc.bibliographiccitation.lastpage","11"],["dc.bibliographiccitation.volume","13"],["dc.contributor.author","Franz, Mathias"],["dc.contributor.author","Schülke, Oliver"],["dc.contributor.author","Ostner, Julia"],["dc.date.accessioned","2017-09-07T11:54:43Z"],["dc.date.available","2017-09-07T11:54:43Z"],["dc.date.issued","2013"],["dc.description.abstract","BackgroundIt is often assumed that evolution takes place on very large timescales. Countering this assumption, rapid evolutionary dynamics are increasingly documented in biological systems, e.g. in the context of predator–prey interactions, species coexistence and invasion. It has also been shown that rapid evolution can facilitate the evolution of cooperation. In this context often evolutionary dynamics influence population dynamics, but in spatial models rapid evolutionary dynamics also emerge with constant population sizes. Currently it is not clear how well these spatial models apply to species in which individuals are not embedded in fixed spatial structures. To address this issue we employ an agent-based model of group living individuals. We investigate how positive assortment between cooperators and defectors and pay-off differences between cooperators and defectors depend on the occurrence of evolutionary dynamics.ResultsWe find that positive assortment and pay-off differences between cooperators and defectors differ when comparing scenarios with and without selection, which indicates that rapid evolutionary dynamics are occurring in the selection scenarios. Specifically, rapid evolution occurs because changes in positive assortment feed back on evolutionary dynamics, which crucially impacts the evolution of cooperation. At high frequencies of cooperators these feedback dynamics increase positive assortment facilitating the evolution of cooperation. In contrast, at low frequencies of cooperators rapid evolutionary dynamics lead to a decrease in assortment, which acts against the evolution of cooperation. The contrasting dynamics at low and high frequencies of cooperators create positive frequency-dependent selection.ConclusionsRapid evolutionary dynamics can influence the evolution of cooperation in group-living species and lead to positive frequency-dependent selection even if population size and maximum group-size are not affected by evolutionary dynamics. Rapid evolutionary dynamics can emerge in this case because sufficiently strong selective pressures allow evolutionary and demographic dynamics, and consequently also feedback between assortment and evolution, to occur on the same timescale. In particular, emerging positive frequency-dependent selection could be an important explanation for differences in cooperative behaviors among different species with similar population structures such as humans and chimpanzees."],["dc.identifier.doi","10.1186/1471-2148-13-235"],["dc.identifier.gro","3151485"],["dc.identifier.pmid","24168033"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8291"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","1471-2148"],["dc.rights","CC BY 2.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/2.0"],["dc.title","Rapid evolution of cooperation in group-living animals"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]