Ostner, Julia

[["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","141"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Naturwissenschaften"],["dc.bibliographiccitation.lastpage","144"],["dc.bibliographiccitation.volume","90"],["dc.contributor.author","Ostner, Julia"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2017-11-15T12:42:53Z"],["dc.date.available","2017-11-15T12:42:53Z"],["dc.date.issued","2003"],["dc.description.abstract","Masculinization of female genitalia and female intersexual dominance distinguish spotted hyenas (Crocuta crocuta) and Malagasy primates (Lemuriformes) from most other mammals. An unusual prenatal endocrine environment has been proposed to proximately underlie the development of these traits in hyenas. To examine whether female dominance and genital masculinization are similarly enhanced by the prenatal environment in lemurid primates, we measured androgen and estrogen excretion in pregnant wild redfronted lemurs (Eulemur fulvus rufus). Our results showed that estrogen levels during the second phase of gestation were much higher in females carrying a male fetus than in female-carrying mothers. This may indicate the onset of testicular activity in male fetuses, because androgens of fetal origin are aromatized to maternal estrogens. Levels of androgen excretion were similar in all mothers regardless of the fetus' sex, which may suggest that androgen-independent mechanisms also contribute to female masculinization. The much higher androgen/estrogen ratio in female-carrying mothers indicates that relative, rather than absolute, prenatal steroid concentrations may play a role in female masculinization."],["dc.identifier.doi","10.1007/s00114-003-0404-9"],["dc.identifier.pmid","12649757"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/10029"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Intersexual dominance, masculinized genitals and prenatal steroids: comparative data from lemurid primates"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["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","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.firstpage","118"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Folia Primatologica"],["dc.bibliographiccitation.lastpage","118"],["dc.bibliographiccitation.volume","80"],["dc.contributor.author","Fürtbauer, Ines"],["dc.contributor.author","Schuelke, Oliver"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Ostner, Julia"],["dc.date.accessioned","2018-02-22T15:05:03Z"],["dc.date.available","2018-02-22T15:05:03Z"],["dc.date.issued","2009"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/12437"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Reproductive Parameters of Wild Female Assamese Macaques (Macaca assamensis)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","104774"],["dc.bibliographiccitation.journal","Psychoneuroendocrinology"],["dc.bibliographiccitation.volume","120"],["dc.contributor.author","Rincon, Alan V."],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Schülke, Oliver"],["dc.contributor.author","Ostner, Julia"],["dc.date.accessioned","2021-04-14T08:23:20Z"],["dc.date.available","2021-04-14T08:23:20Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1016/j.psyneuen.2020.104774"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/80881"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.issn","0306-4530"],["dc.title","Testosterone and cortisol are negatively associated with ritualized bonding behavior in male macaques"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["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","2020-12-10T14:06:31Z"],["dc.date.available","2020-12-10T14:06:31Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1002/ab.v45.2"],["dc.identifier.issn","0096-140X"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/69928"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Subtypes of aggression and their relation to anxiety in Barbary macaques"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","113736"],["dc.bibliographiccitation.journal","General and Comparative Endocrinology"],["dc.bibliographiccitation.volume","306"],["dc.contributor.author","Sadoughi, Baptiste"],["dc.contributor.author","Girard-Buttoz, Cédric"],["dc.contributor.author","Engelhardt, Antje"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Ostner, Julia"],["dc.date.accessioned","2021-06-01T09:41:32Z"],["dc.date.available","2021-06-01T09:41:32Z"],["dc.date.issued","2021"],["dc.identifier.doi","10.1016/j.ygcen.2021.113736"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/84953"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.issn","0016-6480"],["dc.title","Non-invasive assessment of metabolic responses to food restriction using urinary triiodothyronine and cortisol measurement in macaques"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","485"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Behavioral Ecology and Sociobiology"],["dc.bibliographiccitation.lastpage","495"],["dc.bibliographiccitation.volume","52"],["dc.contributor.author","Ostner, Julia"],["dc.contributor.author","Kappeler, Peter"],["dc.contributor.author","Heistermann, Michael"],["dc.date.accessioned","2017-09-07T11:47:56Z"],["dc.date.available","2017-09-07T11:47:56Z"],["dc.date.issued","2003"],["dc.description.abstract","The aim of this study was to examine effects of seasonal and social factors on male androgen excretion in a seasonally breeding primate living in multimale-multifemale groups. By combining detailed behavioural observations (>2,500 h) on 3 groups of redfronted lemurs living in Kirindy Forest/Madagascar with non-invasive hormone analysis of >800 faecal samples collected concomitantly from the same animals, we tested predictions on: (1) the effect of social status on immunoreactive testosterone (iT) excretion; (2) seasonal variation of iT across reproductive periods; and (3) the relationship between aggression and iT excretion. The study lasted 14 months, covering two mating and one birth season. The results revealed that males fall into two distinct social classes, with one dominant male and several subordinate males in each group. In contrast to our prediction, the behavioural differences between these two classes were not reflected by differences in androgen levels, making physiological suppression of testicular function an unlikely mechanism of male reproductive competition. As expected for a seasonally breeding animal, iT values were elevated during the mating season. Androgen levels tracked the increase in the rate of reproductive aggression during the mating season as predicted by the challenge hypothesis. An increase in aggression due to spontaneous social instability outside the mating season, however, was not linked to a parallel rise of iT. Furthermore, the highest iT levels were obtained during the birth season, which may be part of a male strategy to remain aggressive during this period of high infanticide risk. These findings suggest that redfronted lemurs do not respond with increases in androgens to short-term challenges and that high androgen levels instead correlate with longer-lasting and predictable situations, such as the mating and birth seasons."],["dc.identifier.doi","10.1007/s00265-002-0532-9"],["dc.identifier.gro","3150773"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7561"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0340-5443"],["dc.subject","Faecal androgens; Challenge hypothesis; Seasonality; Aggression; Lemurs"],["dc.title","Seasonal variation and social correlates of androgen excretion in male redfronted lemurs ( Eulemur fulvus rufus )"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e23105"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","PLoS ONE"],["dc.bibliographiccitation.volume","6"],["dc.contributor.author","Fürtbauer, Ines"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Schülke, Oliver"],["dc.contributor.author","Ostner, Julia"],["dc.date.accessioned","2017-09-07T11:54:37Z"],["dc.date.available","2017-09-07T11:54:37Z"],["dc.date.issued","2011"],["dc.description.abstract","In numerous primates living in mixed-sex groups, females display probabilistic cues of fertility to simultaneously concentrate paternity to dominant males while diluting it amongst others as a means to reduce the risk of infanticide and to increase male care for offspring. A few species, however, lack these cues and potentially conceal fertility from males; yet, to date, little is known about mating patterns and their underlying proximate mechanisms in such species. Here, we investigated mating activity and sexual consortships relative to female reproductive state in wild Assamese macaques (Macaca assamensis), a species where females lack prominent anogenital swellings and copulation calls. During two mating seasons (2837 contact hours) we recorded sexual and social behaviors, sexual consortships, and collected 1178 fecal samples (n = 15 females) which were analyzed for progestogen concentrations to assess female reproductive state and to determine the timing of ovulation and conception. Although mostly conceiving in their first ovarian cycle, females were sexually receptive throughout the entire 4-month mating season, and within-cycle mating frequencies were not increased during fertile phases. Dominant males did not monopolize fertile matings, and consortships by high-ranking males lasted for long periods, which were not exclusively linked to female fertile phases. Furthermore, females copulated promiscuously but not randomly, i.e. for almost every female, matings were concentrated to a certain male, irrespective of male rank. Collectively, we demonstrate that fertility is undisclosed to males. The extreme extended female sexuality facilitated by concealed fertility may allow females to create differentiated mating relationships within a promiscuous mating system. Our study provides important new insight into the plasticity of female sexuality in non-human primates."],["dc.identifier.doi","10.1371/journal.pone.0023105"],["dc.identifier.gro","3151464"],["dc.identifier.pmid","21853074"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8336"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8268"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","1932-6203"],["dc.rights","CC BY 2.5"],["dc.rights.uri","https://creativecommons.org/licenses/by/2.5"],["dc.title","Concealed Fertility and Extended Female Sexuality in a Non-Human Primate (Macaca assamensis)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]