Heistermann, Michael

[["dc.bibliographiccitation.firstpage","701"],["dc.bibliographiccitation.issue","3-4"],["dc.bibliographiccitation.journal","International Journal of Primatology"],["dc.bibliographiccitation.lastpage","724"],["dc.bibliographiccitation.volume","35"],["dc.contributor.author","Girard-Buttoz, Cedric"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Rahmi, Erdiansyah"],["dc.contributor.author","Agil, Muhammad"],["dc.contributor.author","Fauzan, Panji Ahmad"],["dc.contributor.author","Engelhardt, Antje"],["dc.date.accessioned","2018-11-07T09:37:05Z"],["dc.date.available","2018-11-07T09:37:05Z"],["dc.date.issued","2014"],["dc.description.abstract","Male primates living in multimale groups tend to direct mate and mate-guarding choices toward females of high reproductive value, i.e., high-ranking, parous females, or females with which they share strong bonds. Little is known, however, about the constraints that may limit male mate-guarding choices (the costs of this behavior) and the influence of the females' quality on male investment in mate-guarding. We aimed to study the effects of female rank, parity status, and male-female social bond strength on the costs of and investment in mate-guarding by males. We carried out our study during two reproductive seasons on three groups of wild long-tailed macaques in Indonesia. We combined behavioral observations on male locomotion and activity with noninvasive measurements of fecal glucocorticoids (fGC). Males spent less time feeding when mate-guarding nulliparous females than when mate-guarding parous females and tended to have higher fGC levels when mate-guarding low-ranking nulliparous females than when mate-guarding high-ranking nulliparous ones. Evolution should thus favor male choice for high-ranking parous females because such a decision brings benefits at proximate (reduced costs of mate-guarding) and ultimate (higher reproductive value) levels. Further, male investment in mate-guarding was flexible and contingent on female reproductive and social value. Males were more vigilant and more aggressive toward other males when mate-guarding females to which they were strongly bonded and/or high-ranking ones than when mate-guarding other females. Our findings bring a new dimension to the study of mate choice by showing that males not only mate preferentially with high-quality females but may also aim to secure paternity with these females through optimized monopolization."],["dc.identifier.doi","10.1007/s10764-014-9775-3"],["dc.identifier.isi","000340539200006"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/12121"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32758"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1573-8604"],["dc.relation.issn","0164-0291"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Costs of and Investment in Mate-Guarding in Wild Long-Tailed Macaques (Macaca fascicularis): Influences of Female Characteristics and Male-Female Social Bonds"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e18042"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","PLoS ONE"],["dc.bibliographiccitation.volume","6"],["dc.contributor.author","Girard-Buttoz, Cedric"],["dc.contributor.author","Higham, James P."],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Wedegaertner, Stefan"],["dc.contributor.author","Maestripieri, Dario"],["dc.contributor.author","Engelhardt, Antje"],["dc.date.accessioned","2018-11-07T08:58:00Z"],["dc.date.available","2018-11-07T08:58:00Z"],["dc.date.issued","2011"],["dc.description.abstract","Studies of the nutritional status of wild animals are important in a wide range of research areas such as ecology, behavioural ecology and reproductive biology. However, they have so far been strongly limited by the indirect nature of the available non-invasive tools for the measurement of individual energetic status. The measurement of urinary C-peptide (UCP), which in humans and great apes shows a close link to individual nutritional status, may be a more direct, non-invasive tool for such studies in other primates as well and possibly even in non-primate mammals. Here, we test the suitability of UCPs as markers of nutritional status in non-hominid primates, investigating relationships between UCPs and body-mass-index (BMI), skinfold fatness, and plasma C-peptide levels in captive and free-ranging macaques. We also conducted a food reduction experiment, with daily monitoring of body weight and UCP levels. UCP levels showed significant positive correlations with BMI and skinfold fatness in both captive and free-ranging animals and with plasma C-peptide levels in captive ones. In the feeding experiment, UCP levels were positively correlated with changes in body mass and were significantly lower during food reduction than during re-feeding and the pre-experimental control condition. We conclude that UCPs may be used as reliable biomarkers of body condition and nutritional status in studies of free-ranging catarrhines. Our results open exciting opportunities for energetic studies on free-ranging primates and possibly also other mammals."],["dc.identifier.doi","10.1371/journal.pone.0018042"],["dc.identifier.isi","000289055700023"],["dc.identifier.pmid","21479215"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8313"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/23538"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Public Library Science"],["dc.relation.issn","1932-6203"],["dc.rights","CC BY 2.5"],["dc.rights.uri","https://creativecommons.org/licenses/by/2.5"],["dc.title","Urinary C-Peptide Measurement as a Marker of Nutritional Status in Macaques"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","143"],["dc.bibliographiccitation.journal","Physiology & Behavior"],["dc.bibliographiccitation.lastpage","153"],["dc.bibliographiccitation.volume","141"],["dc.contributor.author","Girard-Buttoz, Cedric"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Rahmi, Erdiansyah"],["dc.contributor.author","Agil, Muhammad"],["dc.contributor.author","Fauzan, Panji Ahmad"],["dc.contributor.author","Engelhardt, Antje"],["dc.date.accessioned","2018-11-07T09:59:39Z"],["dc.date.available","2018-11-07T09:59:39Z"],["dc.date.issued","2015"],["dc.description.abstract","The challenge hypothesis (Wingfield et al., 1990) has been broadly utilised as a conceptual framework to study male androgen correlates of reproductive challenges in mammals. These studies mainly assessed male androgen responsiveness to a general degree of challenge over extended periods of time. Short term co-variation between the socio-sexual challenging context and androgen levels remains, however, largely understudied. We thus aim at providing a multi-level test of the challenge hypothesis by investigating the inter-and intra-individual variations in faecal androgen excretion associated to 1) breeding seasonality, 2) dominance rank, 3) mate-guarding activity and 4) value of the guarded female. We studied long-tailed macaques, a species in which males engage in highly challenging monopolisation of females over discreet periods of time. This particularity allows testing specifically the predicted increase from level B to level C in the challenge hypothesis. The study was carried out during two reproductive seasons on three groups of wild long-tailed macaques. We combined behavioural observations and non-invasive measurements of faecal androgen metabolite (fAM) levels. We found that, as predicted by the challenge hypothesis, male long-tailed macaques respond not only to seasonal but also to short term reproductive challenges by adapting their androgen levels. First, males exhibited a seasonal rise in fAM levels during the mating period which may be triggered by fruit availability as shown by our phenological data. Second, males had increased androgen levels when mate-guarding females and, across mate-guarding periods, males had higher fAM levels when monopolising high-ranking parous females than when monopolising low-ranking ones. Finally, high-ranking males had higher fAM levels than low-ranking males year round. Our study confirms that, in species with a high degree of female monopolisability, androgen may be an important physiological fitness enhancing tool for males by increasing female monopolisation efficiency (in particular with highly valuable females) and helping males to respond to rank take-over challenges. (C) 2015 The Authors. Published by Elsevier Inc."],["dc.identifier.doi","10.1016/j.physbeh.2015.01.015"],["dc.identifier.isi","000350096000021"],["dc.identifier.pmid","25596329"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11515"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/37643"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0031-9384"],["dc.rights","CC BY-NC-ND 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by-nc-nd/4.0"],["dc.title","Androgen correlates of male reproductive effort in wild male long-tailed macaques (Macaca fascicularis): A multi-level test of the challenge hypothesis"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","637"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Hormones and Behavior"],["dc.bibliographiccitation.lastpage","648"],["dc.bibliographiccitation.volume","66"],["dc.contributor.author","Girard-Buttoz, Cedric"],["dc.contributor.author","Heistermann, Michael"],["dc.contributor.author","Rahmi, Erdiansyah"],["dc.contributor.author","Agil, Muhammad"],["dc.contributor.author","Fauzan, Panji Ahmad"],["dc.contributor.author","Engelhardt, Antje"],["dc.date.accessioned","2018-11-07T09:35:38Z"],["dc.date.available","2018-11-07T09:35:38Z"],["dc.date.issued","2014"],["dc.description.abstract","Mate-guarding is an important determinant of male reproductive success in a number of species. However, it is known to potentially incur costs. The aim of the present study was to assess the effect of mate-guarding on male physiological stress and aggression in long-tailed macaques, a species in which males mate-guard females to a lesser extent than predicted by the Priority of Access model (PoA). The study was carried out during two mating periods on three groups of wild long-tailed macaques in Indonesia by combining behavioral observations with non-invasive measurements of fecal glucocorticoid (fGC) levels. Mate-guarding was associated with a general rise in male stress hormone levels but, from a certain threshold of mate-guarding onwards, increased vigilance time was associated with a decrease in stress hormone output. Mate-guarding also increased male-male aggression rate and male vigilance time. Overall, alpha males were more physiologically stressed than other males independently of mating competition. Increased glucocorticoid levels during mate-guarding are most likely adaptive since it may help males to mobilize extra-energy required for mate-guarding and ultimately maintain a balanced energetic status. However, repeated exposure to high levels of stress over an extended period is potentially deleterious to the immune system and thus may carry costs. This potential physiological cost together with the cost of increased aggression mate-guarding male face may limit the male's ability to mate-guard females, explaining the deviance from the PoA model observed in long-tailed macaques. Comparing our results to previous findings we discuss how ecological factors, reproductive seasonality and rank achievement may modulate the extent to which costs of mate-guarding limit male monopolization abilities. (C) 2014 The Authors. Published by Elsevier Inc."],["dc.identifier.doi","10.1016/j.yhbeh.2014.09.003"],["dc.identifier.isi","000344134600008"],["dc.identifier.pmid","25236888"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11371"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32429"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Academic Press Inc Elsevier Science"],["dc.relation.issn","1095-6867"],["dc.relation.issn","0018-506X"],["dc.rights","CC BY-NC-ND 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by-nc-nd/3.0"],["dc.title","Costs of mate-guarding in wild male long-tailed macaques (Macaca fascicularis): Physiological stress and aggression"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e22398"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","PLoS ONE"],["dc.bibliographiccitation.volume","6"],["dc.contributor.author","Higham, James P."],["dc.contributor.author","Girard-Buttoz, Cedric"],["dc.contributor.author","Engelhardt, Antje"],["dc.contributor.author","Heistermann, Michael"],["dc.date.accessioned","2018-11-07T08:54:13Z"],["dc.date.available","2018-11-07T08:54:13Z"],["dc.date.issued","2011"],["dc.description.abstract","Nutritional status is a critical element of many aspects of animal ecology, but has proven difficult to measure non-invasively in studies of free-ranging animals. Urinary C-peptide of insulin (UCP), a small polypeptide cleaved in an equimolar ratio from proinsulin when the body converts it to insulin, offers great promise in this regard, and recent studies of several non-human primate species have utilized it with encouraging results. Despite this, there are a number of unresolved issues related to the collection, processing, storage and transport of samples. These include: contamination of samples on collection (most commonly by dirt or faeces), short-term storage before returning to a field station, differences in processing and long-term storage methods (blotting onto filter paper, freezing, lyophilizing), and for frozen samples, transportation while keeping samples frozen. Such issues have been investigated for urine samples in particular with respect to their effects on steroid hormone metabolites, but there has been little investigation of their effects on UCP measurement. We collected samples from captive macaques, and undertook a series of experiments where we systematically manipulated samples and tested the effects on subsequent UCP measurements. We show that contamination of urine samples by faeces led to a decrease in UCP levels by >90%, but that contamination with dirt did not have substantial effects. Short-term storage (up to 12 hours) of samples on ice did not affect UCP levels significantly, but medium-term storage (up to 78 hours) did. Freezing and lyophilization for long-term storage did not affect UCP levels, but blotting onto filter paper did. A transportation simulation showed that transporting frozen samples packed in ice and insulated should be acceptable, but only if it can be completed within a period of a few days and if freeze-thaw can be avoided. We use our data to make practical recommendations for fieldworkers."],["dc.description.sponsorship","German Research Council [DFG EN 719/2]; Volkswagen Foundation"],["dc.identifier.doi","10.1371/journal.pone.0022398"],["dc.identifier.isi","000293097300043"],["dc.identifier.pmid","21799844"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8333"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/22621"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Public Library Science"],["dc.relation.issn","1932-6203"],["dc.rights","CC BY 2.5"],["dc.rights.uri","https://creativecommons.org/licenses/by/2.5"],["dc.title","Urinary C-Peptide of Insulin as a Non-Invasive Marker of Nutritional Status: Some Practicalities"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]