Koenig, Andreas

[["dc.bibliographiccitation.journal","American Journal of Physical Anthropology"],["dc.bibliographiccitation.volume","150"],["dc.contributor.author","Koenig, Andreas"],["dc.contributor.author","Scarry, Clara J."],["dc.contributor.author","Wheeler, Brandon C."],["dc.contributor.author","Borries, Carola"],["dc.date.accessioned","2018-11-07T09:29:54Z"],["dc.date.available","2018-11-07T09:29:54Z"],["dc.date.issued","2013"],["dc.format.extent","171"],["dc.identifier.isi","000318043201459"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31166"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.publisher.place","Hoboken"],["dc.relation.conference","82nd Annual Meeting of the American-Association-of-Physical-Anthropologists"],["dc.relation.eventlocation","Knoxville, TN"],["dc.relation.issn","0002-9483"],["dc.title","Agonistic relationships among female primates: the axes of despotism"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","701"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","American journal of primatology"],["dc.bibliographiccitation.lastpage","712"],["dc.bibliographiccitation.volume","68"],["dc.contributor.author","Ostner, Julia"],["dc.contributor.author","Chalise, Mukesh K."],["dc.contributor.author","Koenig, Andreas"],["dc.contributor.author","Launhardt, Kristin"],["dc.contributor.author","Nikolei, Julia"],["dc.contributor.author","Podzuweit, Doris"],["dc.contributor.author","Borries, Carola"],["dc.date.accessioned","2018-02-20T10:02:45Z"],["dc.date.available","2018-02-20T10:02:45Z"],["dc.date.issued","2006"],["dc.description.abstract","In species with a high risk of infanticide, a conflict of interest exists between the sexes over the amount of paternity information that is available to males. While females are expected to keep males unaware of their reproductive status in order to confuse paternity, selection should favor those male traits that enhance the males' assessment of female status and consequently of paternity probability. In Hanuman langurs (Semnopithecus entellus), a species that is extremely vulnerable to infanticide, females have been shown to successfully conceal the exact timing of ovulation from males--perhaps because they exhibit no sexual swelling and mate during all reproductive phases, including gestation. Nevertheless, it remains unclear whether males have hitherto unrecognized information about females' reproductive condition on a broader level that could still enhance male reproductive success. We investigated male assessment of female reproductive states in a population of wild Hanuman langurs as indicated by changes in male behavior, such as rates of copulations, anogenital inspections, and consortships, in relation to different female receptive periods (pregnant, fertile-nonconceptional, and conceptional). Our data indicate that males were able to discern qualitatively distinct reproductive states. Males were more interested in fertile than pregnant females, as indicated by higher copulation rates. Based on consortships, males distinguished fertile from nonfertile phases, as well as fertile, nonconceptional receptive periods from conceptional ones. Hanuman langur males are thus not as unaware of female reproductive condition as previously thought, supporting the idea of an ongoing battle of the sexes over paternity information. However, granting some knowledge while at the same time concealing the exact day of ovulation may also reflect a pure female strategy of balancing paternity concentration with paternity confusion, which is the most likely strategy in this system with high infanticide risk and male defense of infants."],["dc.identifier.doi","10.1002/ajp.20260"],["dc.identifier.pmid","16786522"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/12307"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","What Hanuman langur males know about female reproductive status"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","860437"],["dc.bibliographiccitation.journal","Frontiers in Ecology and Evolution"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Koenig, Andreas"],["dc.contributor.author","Miles, Angela"],["dc.contributor.author","Riaz, Durr-E-Ajam"],["dc.contributor.author","Borries, Carola"],["dc.date.accessioned","2022-09-01T09:51:06Z"],["dc.date.available","2022-09-01T09:51:06Z"],["dc.date.issued","2022"],["dc.description.abstract","Male-female agonism varies throughout the primate order with males often dominating females, especially in sexually dimorphic species. While intersexual agonism has been attributed to sexually coercive contexts, it can also occur for other reasons and intersexual dominance may be influenced by the adult sex ratio. If the proportion of males is high, certain males will regularly lose against other males. Loser-effects may then pave the way for some females to dominate these males, an effect that has been described in a few primate species. Here we investigated the frequency, general style, and context of agonism among gray langurs (\n Semnopithecus\n spp.). Data were collected at two study sites, at Jodhpur, India (one group), and at Ramnagar, Nepal (two groups). The adult sex ratio varied between 0.077 and 1.000 males to females. At both sites, data on agonistic interactions (aggression and submission) were collected in continuous focal animal and\n ad libitum\n sampling techniques during 1,945 contact hours (including 1,220 focal animal hours, total). Although aggression intensity was low, high directional consistency and the rare occurrence of counteraggression suggested a despotic dominance style, a likely prerequisite for dominance effects based on adult sex ratio. Aggression by females against males was very rare and mainly occurred in the defense of offspring. We found little evidence for partial female dominance regardless of adult sex ratio. In a few cases in which a female had a higher dominance index than a male, she did not dominate this male in dyadic encounters. Agonism by males directed at females occurred mainly in a feeding context while male policing and a sexual context were both rare. The latter was mostly restricted to females after they had harassed a sexual interaction or after they had behaved proceptively toward a male. Our study suggests that across species the effect of adult sex ratio on female dominance might be more variable than previously suggested. The fact that most agonism between males and females occurred over food identifies intersexual feeding competition as a new research avenue with potentially important consequences for existing ideas on the costs and benefits of group life and composition."],["dc.description.sponsorship"," Deutscher Akademischer Austauschdienst http://dx.doi.org/10.13039/501100001655"],["dc.description.sponsorship"," Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659"],["dc.description.sponsorship"," Alexander von Humboldt-Stiftung http://dx.doi.org/10.13039/100005156"],["dc.identifier.doi","10.3389/fevo.2022.860437"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/113883"],["dc.notes.intern","DOI-Import GROB-597"],["dc.relation.eissn","2296-701X"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Intersexual Agonism in Gray Langurs Reflects Male Dominance and Feeding Competition"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","232"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Evolutionary Anthropology Issues News and Reviews"],["dc.bibliographiccitation.lastpage","238"],["dc.bibliographiccitation.volume","25"],["dc.contributor.author","Borries, Carola"],["dc.contributor.author","Sandel, Aaron A."],["dc.contributor.author","Koenig, Andreas"],["dc.contributor.author","Fernandez-Duque, Eduardo"],["dc.contributor.author","Kamilar, Jason M."],["dc.contributor.author","Amoroso, Caroline R."],["dc.contributor.author","Barton, Robert A."],["dc.contributor.author","Bray, Joel"],["dc.contributor.author","Di Fiore, Anthony"],["dc.contributor.author","Gilby, Ian C."],["dc.contributor.author","Gordon, Adam D."],["dc.contributor.author","Mundry, Roger"],["dc.contributor.author","Port, Markus"],["dc.contributor.author","Powell, Lauren E."],["dc.contributor.author","Pusey, Anne E."],["dc.contributor.author","Spriggs, Amanda"],["dc.contributor.author","Nunn, Charles L."],["dc.date.accessioned","2018-11-07T10:09:03Z"],["dc.date.available","2018-11-07T10:09:03Z"],["dc.date.issued","2016"],["dc.description.abstract","Recent decades have seen rapid development of new analytical methods to investigate patterns of interspecific variation. Yet these cutting-edge statistical analyses often rely on data of questionable origin, varying accuracy, and weak comparability, which seem to have reduced the reproducibility of studies. It is time to improve the transparency of comparative data while also making these improved data more widely available. We, the authors, met to discuss how transparency, usability, and reproducibility of comparative data can best be achieved. We propose four guiding principles: 1) data identification with explicit operational definitions and complete descriptions of methods; 2) inclusion of metadata that capture key characteristics of the data, such as sample size, geographic coordinates, and nutrient availability (for example, captive versus wild animals); 3) documentation of the original reference for each datum; and 4) facilitation of effective interactions with the data via user friendly and transparent interfaces. We urge reviewers, editors, publishers, database developers and users, funding agencies, researchers publishing their primary data, and those performing comparative analyses to embrace these standards to increase the transparency, usability, and reproducibility of comparative studies."],["dc.description.sponsorship","NSF Biological Anthropology [BCS-1355902]; Duke University"],["dc.identifier.doi","10.1002/evan.21502"],["dc.identifier.isi","000386039300004"],["dc.identifier.pmid","27753217"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39588"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","1520-6505"],["dc.relation.issn","1060-1538"],["dc.title","Transparency, usability, and reproducibility: Guiding principles for improving comparative databases using primates as examples"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","924"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Ethology"],["dc.bibliographiccitation.lastpage","939"],["dc.bibliographiccitation.volume","111"],["dc.contributor.author","Ostner, Julia"],["dc.contributor.author","Borries, Carola"],["dc.contributor.author","Schülke, Oliver"],["dc.contributor.author","Koenig, Andreas"],["dc.date.accessioned","2017-09-07T11:54:45Z"],["dc.date.available","2017-09-07T11:54:45Z"],["dc.date.issued","2005"],["dc.description.abstract","In polygynous, sexual dimorphic species with higher variance in male reproductive success compared with females, females are expected to invest more heavily in sons than daughters within the constraints imposed by their physical condition (Science 1973; 179:90). Mothers in good condition, usually those of high rank, should produce more sons than females in poor condition or of low rank. We investigated sex allocation and sex-biased maternal investment in a population of wild Hanuman langurs using rank and group size as approximations of female physical condition. Our results show that reproductive costs of sons were higher with both significantly longer interbirth intervals following male births and longer lactational periods for sons. Not in all groups did analyses of rank-dependent sex allocation reveal the expected pattern of high-ranking mothers producing more sons. However, sex ratio was significantly influenced by group size, with females from larger groups, i.e., in worse physical condition, producing a daughter-biased sex ratio. In fact, only females of population-wide superior physical condition can be expected to produce sons, because in Hanuman langurs males disperse and compete population-wide. Thus, our results support the Trivers–Willard model and may explain the mixed evidence accruing from studies of single groups. We present a graphical model of how group size and dominance-related differences in energy gain may influence sex allocation under different competitive regimes relative to overall resource availability. Tests of adaptive sex allocation models should consider whether reproductive competition of the preferred sex takes place primarily within a group or within the population."],["dc.identifier.doi","10.1111/j.1439-0310.2005.01102.x"],["dc.identifier.gro","3151494"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8300"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0179-1613"],["dc.title","Sex Allocation in a Colobine Monkey"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","20120348"],["dc.bibliographiccitation.issue","1618"],["dc.bibliographiccitation.journal","Philosophical Transactions of The Royal Society B Biological Sciences"],["dc.bibliographiccitation.volume","368"],["dc.contributor.author","Koenig, Andreas"],["dc.contributor.author","Scarry, Clara J."],["dc.contributor.author","Wheeler, Brandon C."],["dc.contributor.author","Borries, Carola"],["dc.date.accessioned","2018-11-07T09:24:41Z"],["dc.date.available","2018-11-07T09:24:41Z"],["dc.date.issued","2013"],["dc.description.abstract","Socio-ecological models aim to predict the variation in social systems based on a limited number of ecological parameters. Since the 1960s, the original model has taken two paths: one relating to grouping patterns and mating systems and one relating to grouping patterns and female social structure. Here, we review the basic ideas specifically with regard to non-human primates, present new results and point to open questions. While most primates live in permanent groups and exhibit female defence polygyny, recent studies indicate more flexibility with cooperative male resource defence occurring repeatedly in all radiations. In contrast to other animals, the potential link between ecology and these mating systems remains, however, largely unexplored. The model of the ecology of female social structure has often been deemed successful, but has recently been criticized. We show that the predicted association of agonistic rates and despotism (directional consistency of relationships) was not supported in a comparative test. The overall variation in despotism is probably due to phylogenetic grade shifts. At the same time, it varies within clades more or less in the direction predicted by the model. This suggests that the model's utility may lie in predicting social variation within but not across clades."],["dc.identifier.doi","10.1098/rstb.2012.0348"],["dc.identifier.isi","000317288400011"],["dc.identifier.pmid","23569296"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29881"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Royal Soc"],["dc.relation.issn","1471-2970"],["dc.relation.issn","0962-8436"],["dc.title","Variation in grouping patterns, mating systems and social structure: what socio-ecological models attempt to explain"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]