Schülke, Oliver

[["dc.bibliographiccitation.artnumber","20161304"],["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","1839"],["dc.bibliographiccitation.journal","Proceedings of the Royal Society B: Biological Sciences"],["dc.bibliographiccitation.lastpage","9"],["dc.bibliographiccitation.volume","283"],["dc.contributor.author","Berghänel, Andreas"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Schülke, Oliver"],["dc.contributor.author","Ostner, Julia"],["dc.date.accessioned","2017-09-07T11:54:44Z"],["dc.date.available","2017-09-07T11:54:44Z"],["dc.date.issued","2016"],["dc.description.abstract","Prenatal maternal stress affects offspring phenotype in numerous species including humans, but it is debated whether these effects are evolutionarily adaptive. Relating stress to adverse conditions, current explanations invoke either short-term developmental constraints on offspring phenotype resulting in decelerated growth to avoid starvation, or long-term predictive adaptive responses (PARs) resulting in accelerated growth and reproduction in response to reduced life expectancies. Two PAR subtypes were proposed, acting either on predicted internal somatic states or predicted external environmental conditions, but because both affect phenotypes similarly, they are largely indistinguishable. Only external (not internal) PARs rely on high environmental stability particularly in long-lived species. We report on a crucial test case in a wild long-lived mammal, the Assamese macaque (Macaca assamensis), which evolved and lives in an unpredictable environment where external PARs are probably not advantageous. We quantified food availability, growth, motor skills, maternal caretaking style and maternal physiological stress from faecal glucocorticoid measures. Prenatal maternal stress was negatively correlated to prenatal food availability and led to accelerated offspring growth accompanied by decelerated motor skill acquisition and reduced immune function. These results support the ‘internal PAR’ theory, which stresses the role of stable adverse internal somatic states rather than stable external environments."],["dc.identifier.doi","10.1098/rspb.2016.1304"],["dc.identifier.fs","622729"],["dc.identifier.gro","3151496"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14299"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8301"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0962-8452"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Prenatal stress effects in a wild, long-lived primate: predictive adaptive responses in an unpredictable environment"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Mammalian Biology"],["dc.contributor.author","Anzà, Simone"],["dc.contributor.author","Berghänel, Andreas"],["dc.contributor.author","Ostner, Julia"],["dc.contributor.author","Schülke, Oliver"],["dc.date.accessioned","2022-10-04T10:21:17Z"],["dc.date.available","2022-10-04T10:21:17Z"],["dc.date.issued","2022"],["dc.description.abstract","Abstract\n \n Socioecological factors are associated with life-history patterns and growth trajectories among primates. Under certain conditions, selection may favor a temporal decoupling of growth and major life-history events such as sexual maturation or natal dispersal. Yet, empirical tests of these associations in wild populations remain scarce owing to the lack of non-invasive methods to capture growth trajectories. In this study, we first compared two non-invasive methods of digital photogrammetry. Then, we used parallel laser photogrammetry to investigate forearm growth of wild Assamese macaque males and females in their natural habitat at Phu Khieo Wildlife Sanctuary, Thailand to test life-history and socio-ecological hypotheses. Across 48 males and 44 females, we estimated growth trajectories and pseudo-velocity curves by applying quadratic plateau models and non-parametric LOESS regressions. We assessed the development of sexual dimorphism by comparing the sexes at five different ages. Females had completed 96% of their growth at the age at first birth (5.9 years) and ceased growing at 7.1 years of age. Males, in contrast, grew until well after their average age of natal dispersal: they reached 81% of their size at the age of natal dispersal (4.0 years), and ceased growing only at 9.0 years of age, much later than females. Sexual dimorphism in forearm length was driven by an extended growth period in males, which is expected for males dispersing between multimale and multifemale groups and not facing the risk of being ousted by other larger males. Our results contradict the\n neonatal investment hypothesis\n that predicts a desynchronization of investment in growth and reproduction only in female baboons, but not other papionins producing cheaper neonates. Furthermore, male Assamese macaques do not delay natal dispersal until they are fully grown, in accordance with predictions of the\n male-career-framework\n for species with low to medium level of direct competition."],["dc.description.sponsorship"," Deutsche Forschungsgemeinschaft 501100001659"],["dc.description.sponsorship"," Georg-August-Universität Göttingen 501100003385"],["dc.identifier.doi","10.1007/s42991-022-00262-2"],["dc.identifier.pii","262"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/114370"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-600"],["dc.relation.eissn","1618-1476"],["dc.relation.issn","1616-5047"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Growth trajectories of wild Assamese macaques (Macaca assamensis) determined from parallel laser photogrammetry"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","675"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Animal Behaviour"],["dc.bibliographiccitation.lastpage","682"],["dc.bibliographiccitation.volume","80"],["dc.contributor.author","Berghänel, Andreas"],["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","2010"],["dc.description.abstract","Owing to the nature of male competition over a nonshareable resource, cooperation and coalition formation are unexpected among mammalian males. Nevertheless, coalitions of unrelated males are widespread across mammals. Recently, a mathematical model for the evolution of male coalitions within groups was developed, predicting patterns and outcomes of coalitions depending on the degree of contest competition for mates. We tested this model in a species with presumably low-contest competition. Accordingly, under low contest, coalitions should be large, formed by mid- to low-ranking males targeting top-rankers and aimed at decreasing reproductive skew (all-up levelling coalitions). We also investigated the effect of scramble competition on coalitions, as its impact was not included in the model. Scramble competition is expected to be pronounced in our study population of Barbary macaques, Macaca sylvanus, and thus we predicted that coalitions should target mainly young immigrants, irrespective of rank, to isolate them and eventually reduce male group size and, consequently, scramble competition. Data on social interactions, including coalitions, were collected on 23 males of a group of Barbary macaques living at Affenberg Salem, Germany. Coalition size was small, coalitions rarely targeted top-ranking males and all-up levelling coalitions were rare. Overall, the model was not confirmed. In contrast, more than three-quarters of coalitions targeted young immigrants, which were isolated from the group. Thus, male coalition formation in our group seemed to be influenced by scramble rather than contest competition. Both modes of competition should thus be taken into account if payoffs of coalition formation are investigated."],["dc.identifier.doi","10.1016/j.anbehav.2010.07.002"],["dc.identifier.gro","3151468"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8272"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0003-3472"],["dc.title","Coalition formation among Barbary macaque males: the influence of scramble competition"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Behavioral Ecology and Sociobiology"],["dc.bibliographiccitation.volume","73"],["dc.contributor.author","Schülke, Oliver"],["dc.contributor.author","Ostner, Julia"],["dc.contributor.author","Berghänel, Andreas"],["dc.date.accessioned","2020-12-10T14:09:59Z"],["dc.date.available","2020-12-10T14:09:59Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1007/s00265-019-2729-1"],["dc.identifier.eissn","1432-0762"],["dc.identifier.issn","0340-5443"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70633"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Prenatal maternal stress effects on the development of primate social behavior"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","350"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","International Journal of Primatology"],["dc.bibliographiccitation.lastpage","370"],["dc.bibliographiccitation.volume","37"],["dc.contributor.author","Minge, Christin"],["dc.contributor.author","Berghänel, Andreas"],["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","2016"],["dc.description.abstract","Male care for offspring is unexpected in polygynandrous mammals. Evidence from nonhuman primates, however, indicates not only the existence of stable male–immature associations in multimale–multifemale groups, but also male care in the form of protection from infanticidal attacks and conspecific harassment. Here, we investigate the relationship characteristics, dynamics, and consequences of male–immature associations in wild Assamese macaques, Macaca assamensis, at Phu Khieo Wildlife Sanctuary, Thailand, to inform hypotheses of their evolutionary origins. Female Assamese macaques reproduce seasonally and do not signal ovulation, resulting in low mating and paternity skew. However, male–immature associations are predicted by paternity, and male behavior potentially reflects paternal effort. We present focal animal data on 12 immatures followed from birth beyond weaning into their juvenile life (1188 focal hours). The distribution of composite sociality indices suggests that male–immature relationships were highly differentiated. Association patterns and the degree of differentiation remained stable from 6 mo well into the juvenile phase, suggesting that male protection extends beyond the phase of high infanticide risk. Based on Hinde indices, immatures were responsible for maintaining the relationships. The likelihood that an infant was associated with its preferred male increased if the mother was absent and if other males were present in proximity, suggesting that immatures sought protection. The presence of the preferred male did not decrease the rate of mild aggression immatures received from group members, but the stronger the relationship between an immature and a male, the more often it received agonistic support from him. Future studies will have to assess whether this agonistic support translates into improved fitness and represents true paternal care."],["dc.identifier.doi","10.1007/s10764-016-9904-2"],["dc.identifier.fs","622721"],["dc.identifier.gro","3151483"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/13300"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8289"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0164-0291"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Patterns and Consequences of Male–Infant Relationships in Wild Assamese Macaques (Macaca assamensis)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Science Advances"],["dc.bibliographiccitation.lastpage","7"],["dc.bibliographiccitation.volume","1"],["dc.contributor.author","Berghänel, Andreas"],["dc.contributor.author","Schülke, Oliver"],["dc.contributor.author","Ostner, Julia"],["dc.date.accessioned","2017-09-07T11:54:39Z"],["dc.date.available","2017-09-07T11:54:39Z"],["dc.date.issued","2015"],["dc.description.abstract","The developmental costs and benefits of early locomotor play are a puzzling topic in biology, psychology, and health sciences. Evolutionary theory predicts that energy-intensive behavior such as play can only evolve if there are considerable benefits. Prominent theories propose that locomotor play is (i) low cost, using surplus energy remaining after growth and maintenance, and (ii) beneficial because it trains motor skills. However, both theories are largely untested. Studying wild Assamese macaques, we combined behavioral observations of locomotor play and motor skill acquisition with quantitative measures of natural food availability and individual growth rates measured noninvasively via photogrammetry. Our results show that investments in locomotor play were indeed beneficial by accelerating motor skill acquisition but carried sizable costs in terms of reduced growth. Even under moderate natural energy restriction, investment in locomotor play accounted for up to 50% of variance in growth, which strongly contradicts the current theory that locomotor play only uses surplus energy remaining after growth and maintenance. Male immatures played more, acquired motor skills faster, and grew less than female immatures, leading to persisting size differences until the age of female maturity. Hence, depending on skill requirements, investment in play can take ontogenetic priority over physical development unconstrained by costs of play with consequences for life history, which strongly highlights the ontogenetic and evolutionary importance of play."],["dc.identifier.doi","10.1126/sciadv.1500451"],["dc.identifier.gro","3151457"],["dc.identifier.pmid","26601237"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/12454"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8260"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","2375-2548"],["dc.rights","CC BY-NC 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by-nc/4.0"],["dc.title","Locomotor play drives motor skill acquisition at the expense of growth: A life history trade-off"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","E10658"],["dc.bibliographiccitation.issue","50"],["dc.bibliographiccitation.journal","Proceedings of the National Academy of Sciences of the United States of America"],["dc.bibliographiccitation.lastpage","E10666"],["dc.bibliographiccitation.volume","114"],["dc.contributor.author","Berghänel, Andreas"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Schülke, Oliver"],["dc.contributor.author","Ostner, Julia"],["dc.date.accessioned","2018-02-07T14:43:24Z"],["dc.date.available","2018-02-07T14:43:24Z"],["dc.date.issued","2017"],["dc.description.abstract","Across mammals, prenatal maternal stress (PREMS) affects many aspects of offspring development, including offspring growth. However, how PREMS translates to offspring growth is inconsistent, even within species. To explain the full range of reported effects of prenatal adversity on offspring growth, we propose an integrative hypothesis: developmental constraints and a counteracting adaptive growth plasticity work in opposition to drive PREMS effects on growth. Mothers experiencing adversity reduce maternal investment leading to stunted growth (developmental constraints). Concomitantly, the pace of offspring life history is recalibrated to partly compensate for these developmental constraints (adaptive growth plasticity). Moreover, the relative importance of each process changes across ontogeny with increasing offspring independence. Thus, offspring exposed to PREMS may grow at the same rate as controls during gestation and lactation, but faster after weaning when direct maternal investment has ceased. We tested these predictions with a comparative analysis on the outcomes of 719 studies across 21 mammal species. First, the observed growth changes in response to PREMS varied across offspring developmental periods as predicted. We argue that the observed growth acceleration after weaning is not \"catch-up growth,\" because offspring that were small for age grew slower. Second, only PREMS exposure early during gestation produced adaptive growth plasticity. Our results suggest that PREMS effects benefit the mother's future reproduction and at the same time accelerate offspring growth and possibly maturation and reproductive rate. In this sense, PREMS effects on offspring growth allow mother and offspring to make the best of a bad start."],["dc.identifier.doi","10.1073/pnas.1707152114"],["dc.identifier.pmid","29180423"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/12033"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.eissn","1091-6490"],["dc.title","Prenatal stress accelerates offspring growth to compensate for reduced maternal investment across mammals"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Primate Biology"],["dc.bibliographiccitation.lastpage","7"],["dc.bibliographiccitation.volume","4"],["dc.contributor.author","Rathke, Eva-Maria"],["dc.contributor.author","Berghänel, Andreas"],["dc.contributor.author","Bissonnette, Annie"],["dc.contributor.author","Ostner, Julia"],["dc.contributor.author","Schülke, Oliver"],["dc.date.accessioned","2017-09-07T11:54:42Z"],["dc.date.available","2017-09-07T11:54:42Z"],["dc.date.issued","2017"],["dc.description.abstract","Inter- and intra-specific variation in the propensity to form coalitions has been explained by variation in the availability of suitable partners, distribution of fighting ability, coalition profitability, and costs of coordination. Male coalition formation can be an alternative reproductive strategy to one-on-one competition to maximize male reproductive success. Here we focus on age as a state variable to explain within-group variation in individual propensity to form coalitions against other group members. We specifically test the prediction that males conditionally switch from a solo strategy for achievement of high mating success to a cooperative strategy after reaching post-prime age in male Barbary macaques (Macaca sylvanus). We combined new observations with data collected in 2006 and 2008 on the same individuals from one captive group living in semi-natural conditions at Affenberg Salem, Germany, and found that in all years males between 5 and 13 years formed significantly fewer coalitions than males 14 years and older (post-prime). More importantly, we found those males that aged into the post-prime phase to have switched their reproductive strategy and to form significantly more coalitions in 2014 compared to 2008. These first longitudinal data together with earlier cross-sectional analyses in this and other primate species suggest that group-level measures of coalition propensity may be strongly affected by the age composition of groups and that male coalition formation can be a conditional reproductive strategy."],["dc.identifier.doi","10.5194/pb-4-1-2017"],["dc.identifier.gro","3151484"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8290"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","2363-4715"],["dc.title","Age-dependent change of coalitionary strategy in male Barbary macaques"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1256"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Behaviour"],["dc.bibliographiccitation.lastpage","1274"],["dc.bibliographiccitation.volume","148"],["dc.contributor.author","Berghänel, Andreas"],["dc.contributor.author","Ostner, Julia"],["dc.contributor.author","Schülke, Oliver"],["dc.date.accessioned","2017-09-07T11:54:35Z"],["dc.date.available","2017-09-07T11:54:35Z"],["dc.date.issued","2011"],["dc.description.abstract","Dyadic agonistic dominance relationships are thought to result from asymmetries in both intrinsic and extrinsic power. One form of extrinsic power is the ability to solicit agonistic support from other individuals. In extreme cases extrinsic power differences may override intrinsic power differences so that physically inferior individuals attain rank positions above stronger competitors. In other cases superior extrinsic power in physically inferior individuals may destabilize the otherwise clear dominance relationships. We tested this prediction with observational data on adult males in one of three free-ranging groups of Barbary macaques at Affenberg Salem, Germany. All prime males that were subjects of this study were at least 5–8 years (average 10 years) younger than the old post-prime males that were all subordinate to them. Assuming large age differences to reflect large intrinsic/physical power differences, interactions between these prime and the old males allowed investigation of the separate effects of intrinsic and extrinsic power asymmetries on dominance relationships. We estimated relationship instability using four different estimates (counter aggression, conflicts initiated by aggression from the subordinate, spontaneous submissions by dominants, and decided conflicts won by the subordinate). Relationship instability did not decrease with increasing asymmetry in intrinsic power. Instead, all four measures of relationship instability were positively related to the number of times the dominant in a dyad was target of destabilizing coalitions. Destabilizing coalitions targeted dominant males in old male–prime male dyads more often than in old male–old male dyads. Consequently, old males had less stable relationships with the much stronger prime males than with each other. We conclude that extrinsic power asymmetries predicted the instability of dyadic dominance relationships and may systematically override intrinsic power asymmetries."],["dc.identifier.doi","10.1163/000579511x600628"],["dc.identifier.gro","3151451"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8254"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0005-7959"],["dc.title","Coalitions destabilize dyadic dominance relationships in male Barbary macaques (Macaca sylvanus)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1109"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Animal Behaviour"],["dc.bibliographiccitation.lastpage","1116"],["dc.bibliographiccitation.volume","81"],["dc.contributor.author","Berghänel, Andreas"],["dc.contributor.author","Ostner, Julia"],["dc.contributor.author","Schröder, Uta"],["dc.contributor.author","Schülke, Oliver"],["dc.date.accessioned","2017-09-07T11:54:35Z"],["dc.date.available","2017-09-07T11:54:35Z"],["dc.date.issued","2011"],["dc.description.abstract","Social bonds have been construed as mental representations mediating social interactions among individuals. It is problematic, however, to differentiate this mechanism from others that assume more direct exchanges and interchanges of behaviour such as reciprocity, market effects or mutualism. We used naturally occurring shifts in rates and patterns of social interactions among male Barbary macaques to test whether affiliation in the nonmating season predicts coalition formation in the mating season. We carried out 1377 h of observation of all 23 males living in a semifree-ranging bisexual group at Affenberg Salem, Germany. The mating season was characterized by significantly increased rates of aggression, male coalition formation and spontaneous submission as well as decreased rates of affiliation. Rates of coalition formation in the mating season were predicted by affiliation between these males several weeks earlier in the nonmating season after we controlled for affiliation in the mating season. We conclude that social bonding in the nonmating season may build reputations among partners that are crucial for cooperation in risk-prone agonistic coalitions against other males. From the pronounced time lag between bonding and cooperation and the fact that males largely ignored affiliation as well as agonistic patterns in the time-matched mating season, we conclude that short-term reciprocity, mutualism or market effects cannot explain these observations. Instead, we conclude that long-term reciprocity mediated by emotional book keeping may be the basic mechanism. Building on that, males may employ a mental representation of their social bonds when choosing partners for cooperative interactions."],["dc.identifier.doi","10.1016/j.anbehav.2011.02.009"],["dc.identifier.gro","3151455"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8258"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0003-3472"],["dc.title","Social bonds predict future cooperation in male Barbary macaques, Macaca sylvanus"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]