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Publikationen

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Anzà S; Heistermann M; Ostner J; Schülke O. Early prenatal but not postnatal glucocorticoid exposure is associated with enhanced HPA axis activity into adulthood in a wild primate. Proc. R. Soc. B.

Goffe A; Niederbremer C; Heistermann M; Fischer J; Dal Pesco F. No evidence for a link between dominance rank, unit size, and faecal glucocorticoid levels in a small sample of wild female Guinea baboons (Papio papio). Int. J. Primatol.

Mustill RL; Higham JP; Weyer AH; Heistermann M; Gunson JL; Govaerts A; Siame S; Hillegas ME; Winters S; Dubuc C; Petersdorf M. Female parity, sexual signalling, and sexual behaviour in the Kinda baboon (Papio kindae). In: Wallis J (ed.), Baboons: Behaviour, Ecology, and Taxonomy, Cambridge University Press.

2025

  • Seasonal variation in aggression and physiological stress in wild female and male redfronted lemurs (Eulemur rufifrons).

    Horm. Behav. 167: 105669 - DOI -

2024

  • Associations between fecal glucocorticoid levels and social bonds vary with relatedness in juvenile rhesus macaques. 

    Sci. Rep. 14(1): 30966 - DOI -
  • Establishment and validation of fecal secretory immunoglobulin A measurement for intestinal mucosal health assessment in wild lemurs.

    Am. J. Primatol. 86(12): e23694 - DOI -
  • Linking energy availability, movement and sociality in a wild primate (Papio ursinus).

    Phil. Trans. R. Soc. B 379(1916): 20220466 - DOI -
  • Chronic kidney disease and kidney stone in a wild chimpanzee (Pan troglodytes verus) in Côte D'Ivoire.

    J. Med. Primatol. 53(5): e12739 - DOI -
  • A non‐invasive measure of bone growth in mammals: Validating urinary CTX‐I as a bone resorption marker through long‐bone growth velocity in bonobos.

    Ecol. Evol. 14(9): e70326 - DOI -
  • Multimodal sexual signals are not precise indicators of fertility in female Kinda baboons.

    Horm. Behav.165: 105632 - DOI -
  • More allogrooming is followed by higher pyhsiological stress in wild female baboons.

    Biol. Lett. 20(8): 20240163 - DOI -
  • The dynamics of sociality and glucocorticoids in wild Assamese macaques.

    Horm. Behav. 164: 105604 - DOI -
  • Behaviour and social bonds of African elephant calves under different holding systems in European zoos.

    JZAR. 12(3): 163-171 - DOI -
  • In vitro matured oocytes have a higher developmental potential than in vivo matured oocytes after hormonal ovarian stimulation in Callithrix jacchus.

    J. Ovarian Res. 17:120 - DOI -
  • Modulation of cell mediated immunity during pregnancy in wild bonobos.

    Biol. Lett. 20:20230548 - DOI -
  • Dental findings in wild great apes from mascerated skull analysis.

    Am. J. Primatol. 86: e23581 - DOI -

2023

  • Average phenotype but not plasticity in two metabolic hormones co-vary in wild female bonobos (Pan paniscus).

    Front. Ecol. Evol. 11: 1300003 - DOI -
  • Bekannte und unbekannte Auswirkungen der GnRH-Vakzine bei Elefanten.

    Pp. 110-116 in Ludwig C, Wiemann I, Steinecker-Quast J (eds) Tagungsbericht der 41. Arbeitstagung Verband der Zootierärzte (VTZ); Schüling Verlag Münster.
  • Differences in mother-infant bond and social behavior of African elephant calves living in situ and ex situ.

    Animals 13: 3051 - DOI -
  • Effects of tourism and researcher presence on fecal glucocorticoid metabolite levels in wild, habituated Sulawesi crested macaques (Macaca nigra).

    Animals 13: 2842 - DOI -
  • Developmental and environmental modulation of fecal thyroid hormone levels in wild Assamese macaques (Macaca assamensis).

    Am. J. Primatol. 85: e23530 - DOI -
  • The long-term bacterial gut signature of a wild primate is associated with a timing effect of pre- and postnatal maternal glucocorticoid levels.

    Microbiome 11: 165 - DOI -
  • Neopterin levels in bonobos vary seasonally and reflect symptomatic respiratory infections.

    EcoHealth 20: 93-104 - DOI -
  • Urinary cytokine measurements do not reflect surgery-induced inflammation in rhesus macaques.

    Am. J. Primatol. 85: e23506 - DOI -
  • Hormonal responses to mating competition in male Tonkean macaques.

    Horm. Behav. 154: 105395 - DOI -
  • Evidence for adolescent length growth spurts in bonobos and other primates highlights the importance of scaling laws.

    eLife 12: RP86635 - DOI -
  • The historical development of zoo elephant survivorship.

    Zoo Biol. 42: 328-338 - DOI -
  • Long-term olfactory memory in African elephants.

    Animals 13: 679 - DOI -
  • Traces of dietary patterns in saliva of hominids: Profiling salivary aminoc acid fingerprints in great apes and humans.

    J. Hum. Evol. 175: 103305 - DOI -
  • Arbeitselefanten im Norden von Myanmar: tierärztliche Herausforderung, Probleme und Grenzen.

    42. Arbeitstagung - Verband der Zootierärzte (VZT), Köln 2023, 22-25

2022

  • Assessing the drivers of gut microbiome composition in wild redfronted lemurs via longitudinal metacommunity analysis.

    Sci. Rep. 12: 21462 - DOI -
  • Transition to siblinghood causes substantial and long-lasting physiological stress reactions in wild bonobos.

    eLife 11: e77227 - DOI -
  • Social correlates of androgens and dispersal age in juvenile male geladas.

    Horm Behav 146: 105264 - DOI -
  • Performance of marmoset monkeys as embryo donors is reflected by different stress-related parameters.

    Animals 12: 2414 - DOI -
  • Plasma testosterone and androstenedione levels follow the same sex-specific patterns in the two Pan species

    Biology 11: 1275 - DOI -
  • The use of alfaxalone for short-term anaesthesia can confound serum progesterone measurements in the common marmoset: a case report.

    Primate Biol. 9: 23-28 - DOI -
  • Blood testosterone levels in sickness and health: male chimpanzee testosterone levels decrease in face of an immune challenge.

    Am. J. Primatol. 84: e23334 - DOI -
  • Salivary cortisol reaction norms in zoo-housed great apes: diurnal slopes and intercepts as indicators of stress response quality.

    Animals 12: 522 - DOI -
  • Simultaneous investigation of urinary and fecal glucocorticoid metabolite concentrations reveals short- versus long-term drivers of HPA-axis activity in a wild primate (Papio ursinus).

    Gen. Comp. Endocrinol. 318: 113985 - DOI -
  • Drivers of bacterial gut microbiome variation within and between groups of a wild Malagasy primate.

    Microbiome 10: 28 - DOI -
  • Testing the role of testosterone versus estrogens in mediating reproductive transitions in female rhesus macaques.

    Horm. Behav. 139: 105123 - DOI -

2021

  • Effects of positive reinforcement training and novel object exposure on salivary cortisol levels under consideration of individual variation in captive African elephants (Loxodonta africana).

    Animals 11: 3525 - DOI -
  • Responsiveness of fecal immunoglobulin A to HPA-axis activation limits its use for mucosal immunity assessment.

    Am J Primatol 83: e23329 - DOI -
  • Social and sexual behaviors predict immune system activation, but not adrenocortical activation, in male rhesus macaques.

    Behav. Ecol. Sociobiol. 75: 159 - DOI -
  • Maternal stress effects on infant development in wild Verreaux´s sifaka (Propithecus verreauxi).

    Behav. Ecol. Sociobiol. 75: 143 - DOI -
  • Monitoring behaviour in African elephants during introduction into a new group: differences between related and unrelated animals.

    Animals 11: 2990 - DOI -
  • The effect of reproductive state on activity budget, feeding behavior, and urinary C-peptide levels in wild female Assamese macaques.

    Behav. Ecol. Sociobiol. 75: 128 - DOI -
  • Fecal glucocorticoids and gastrointestinal parasite infections in wild western lowland gorillas (Gorilla gorilla gorilla) involved in ecotourism.

    Gen. Comp. Endocrinol. 312: 113859 - DOI -
  • Alternative reproductive strategies provide a flexible mechanism for assuring mating success in the European badgers (Meles meles): an investigation from hormonal measures.

    Gen. Comp. Endocrinol. 310: 113823 - DOI -
  • Cell-mediated immune ontogeny is affected by sex but not environmental context in a long-lived primate species.

    Front. Ecol. Evol. 9: 629094 - DOI -
  • Triiodothyronine and cortisol levels in the face of energetic challenges from reproduction, thermoregulation and food intake in female macaques.

    Horm. Behav. 131: 104968 - DOI -
  • Urinary neopterin of wild chimpanzees at Ngogo, Kibale National Park, Uganda, indicates sex-biased cell-mediated immune activity and human-like senescence.

    Sci. Rep. 11: 9298 - DOI -
  • Time-lag of urinary and salivary cortisol response after a psychological stressor in bonobos (Pan paniscus).

    Sci. Rep. 11: 7905 - DOI -
  • Female ornaments: is red skin color attractive to males and related to condition in rhesus macaques?

    Behav. Ecol. 32: 236-247 - DOI -
  • Non-invasive assessment of metabolic responses to food restriction using urinary triiodothyronine and cortisol measurement in macaques.

    Gen. Comp. Endocrinol. 306: 113736 - DOI -
  • Female fertile phase synchrony, and male mating and reproductive skew, in the crested macaque.

    Sci. Rep. 11: 4251 - DOI -
  • Generation and breeding of EGFP transgenic marmoset monkeys: Cell chimerism and implications for disease modelling.

    Cells 10: 505 - DOI -
  • Life on the edge: behavioural and physiological responses of Verreaux´s sifakas (Propithecus verreauxi) to forest edges.

    Primate Biol. 8: 1-13 - DOI -
  • Exploring the utility of hair endocannabinoids for monitoring homeostasis in bonobos.

    Physiol. Biochem. Zool. 94: 83-98 - DOI -
  • The cost of association with males for Bornean and Sumatran female orangutans: a hidden form of sexual conflict?

    Behav Ecol Sociobiol 75: 6 - DOI -

2020

  • Energetics at the urban edge: Environmental and individual predictors of urinary C-peptide levels in wild chacma baboons (Papio ursinus).

    Horm. Behav. 126: 104846 - DOI -
  • Patterns of urinary cortisol levels during ontogeny appear population- rather than species-specific in wild chimpanzees and bonobos.

    J. Hum. Evol. 147: 102869 - DOI -
  • Urinary cortisol increases during a respiratory outbreak in wild chimpanzees.

    Front. Vet. Sci. 7: 485 - DOI -
  • Testosterone and cortisol are negatively associated with ritualized bonding behavior in male macaques.

    Psychoneuroendocrinology 120:104774 - DOI -
  • Dynamics and determinants of glucocorticoid metabolite concentrations in wild Verreaux´s sifakas.

    Horm. Behav. 124: 104760 - DOI -
  • Low rank and primiparity increase fecal glucocorticoid metabolites across gestation in wild geladas.

    Gen. Comp. Endocrinol. 293: 113494 - DOI -
  • Diurnal variation of salivary cortisol in captive African elephants (Loxodonta africana) under routine management conditions and in relation to a translocation event.

    Zoo Biol. 39: 186-196 - DOI -
  • Urinary suPAR: a non-invasive biomarker of infection and tissue inflammation for use in studies of large free-ranging mammals.

    R. Soc. Open Sci. 7: 191825 - DOI -
  • Energy balance but not competitive environment corresponds to allostatic load during development in an Old World monkey.

    Horm. Behav. 119: 104664 - DOI -
  • Collective action reduces androgen responsiveness with implications for shoaling dynamics in stickleback fish.

    Horm. Behav. 119: 104636 - DOI -

2019

  • Altitude and human disturbance are associated with helminth diversity in an endangered primate, Procolobus gordonorum.

    Plos One 14: e0225142 - DOI -
  • One size fits all? Relationship among group size, health, and ecology indicate a lack of an optimal group size in a wild lemur population.

    Behav. Ecol. Sociobiol. 73: 132 - DOI -
  • Use of gonadotropin releasing hormone (GnRH) vaccines for behavioral and reproductive control in managed Asian elephant (Elephas maximus) and African elephant (Loxodonta africana) populations.

    Int. Zoo Ybk. 53: 138-150 - DOI -
  • Measuring urinary cortisol and testosterone levels in male Barbary macaques: A comparison of EIA and LC-MS.

    Gen. Comp. Endocrinol. 281: 117-125 - DOI -
  • Exposure and susceptibility drive reinfection with gastrointestinal parasites in a social primate.

    Funct. Ecol. 33: 1088-1098 - DOI -
  • Physiological and social consequences of gastrointestinal nematode infection in a non-human primate.

    Behav. Ecol. 30: 322-335 - DOI -
  • Are human-dominated landscapes stressful for wild chimpanzees (Pan troglodytes)?

    Biol. Conserv. 233: 73-82 - DOI -
  • Cost of dispersal in a social mammal - body mass loss and increased stress.

    Proc. R. Soc. B. 286: 20190033 - DOI -
  • The development of individual differences in cooperative behaviour: maternal glucocorticoid hormones alter helping behaviour of offspring in wild meerkats.

    Phil. Trans. R. Soc. B 374: 20180117 - DOI -
  • Subtypes of aggression and their relation to anxiety in Barbary macaques.

    Aggressive Behav. 45: 120-128 - DOI -
  • Developmental and family history-based analysis of congenital fused labia phenotype in the captive common marmoset (Callithrix jacchus).

    J. Med. Primatol. 48: 43-50 - DOI -

2018

  • Assessing female reproductive status of spectral tarsier (Tarsius tarsier) using fecal steroid hormone metabolite analysis.

    Am. J. Primatol. 80: e22917 - DOI -
  • Linking plasma sex steroid hormone levels to the condition of external genitalia in European badgers (Meles meles): A critical evaluation of traditional field methodology.

    Mammal Biol. 93: 97-108 - DOI -
  • Do sexual calls in female black capuchin monkeys (Sapajus nigritus) vary with fertility? An acoustic analysis.

    Am. J. Primatol. 80: e22920 - DOI -
  • Prolonged luteal lifespan and pseudopregnancy in Asian elephants (Elephas maximus).

    Anim. Reprod. Sci. 197:58-66 - DOI -
  • Male resource defense mating system in primates? An experimental test in wild capuchin monkeys.

    PloS ONE 13: e0197020 - DOI -
  • Comparison of fecal preservation and extraction methods for steroid hormone metabolite analysis in wild crested macaques.

    Primates 59: 281-292 - DOI -
  • A retrospective analysis of adverse effects of an in vivo fluoroquinolone antibiotic enrofloxacin treatment on oocyte quality in the common marmoset.

    Reprod. Toxicol. 75: 86-95 - DOI -
  • Stress impact on the gut microbiome of free-ranging lowland gorillas.

    Microbiology 164: 40-44 - DOI -

2017

  • Prenatal stress accelerates offspring growth to compensate for reduced maternal investment across mammals.

    P. Natl. Acad. Sci. USA (PNAS) 114: E10658-E10666 - DOI -
  • The influence of stress hormones and aggression on cooperative behaviour in subordinate meerkats.

    Proc. R. Soc. B. 284: 20171248 - DOI -
  • Feeling anxious? The mechanisms of vocal deception in tufted capuchin monkeys.

    Anim. Behav. 130: 37-46 - DOI -
  • Repeated freeze-thaw cycles but not short-term storage of fecal extracts at ambient temperature influence the stability of steroid hormone metabolite levels in crested macaques.

    J. Ked. Hewan. 11: 78-85 - DOI -
  • Group size and visitor numbers predict faecal glucocorticoid concentrations in zoo meerkats.

    R. Soc. Open Sci. 4: 161017 - DOI -
  • Meerkat close calling patterns are linked to sex, social category, season and wind, but not fecal glucocorticoid metabolite concentrations.

    PloS ONE 12: e0175371 - DOI -
  • Validation of a field-friendly extraction and storage method to monitor fecal steroid metabolites in wild orangutans.

    Primates 58: 285-294 - DOI -
  • Age, but not anthelmintic treatment, is associated with urinary neopterin levels in semi-free ranging Barbary macaques.

    Sci. Rep. 7: 41973 - DOI -
  • Is social dispersal stressful? A study in male crested macaques (Macaca nigra).

    Horm. Behav. 87: 62-68 - DOI -

2005-2016

  • Prenatal stress effects in a wild, long-lived primate: predictive adaptive responses in an unpredictable environment.

    Proc. R. Soc. B. 283: 20161304 - DOI -
  • Cortisol coregulation in fish.

    Sci. Rep. 6: 30334 - DOI -
  • Validation of a fecal glucocorticoid assay to assess adrenocortical activity in meerkats using physiological and biological stimuli.

    PLoS ONE 11 (4): e0153161 - DOI -
  • Tailored enrichment strategies and stereotypic behavior in captive individually-housed macaques (Macaca spp.).

    J. Appl. Anim. Welf. Sci. 19: 171-182 - DOI -
  • Long-term oocyte-like cell development in cultures derived from neonatal marmoset monkey ovary.

    Stem Cell Int. 2016: 2480298 - DOI -
  • Post Partum Ovulation bei Elefanten (Elephas maximus und Loxodonta africana) in Europa (2016). In: Steinmetzt H (ed): 35. Arbeitstagung der Zootierärzte im deutschsprachigen Raum.

    Schüling Verlag Münster: 113-127
  • Urinary neopterin, a non-invasive marker of mammalian cellular immune activation, is highly stable under field conditions. 

    Sci. Rep. 5: 16308 - DOI -
  • Evaluating non-invasive markers of non-human primate immune activation and inflammation.

    Am. J. Phys. Anthropol. 158: 673-684 - DOI -
  • Validation of a novel collection device for non-invasive urine sampling from free-ranging animals.

    PloS One 10(11): e0142051 - DOI -
  • Endocrinological correlates of male bimaturism in wild Bornean orangutans.

    Am. J. Primatol. 77: 1170-1178 - DOI -
  • Social behavior and patterns of testosterone and glucocorticoid levels differ between male chacma and Guinea baboons.

    Horm. Behav. 75: 100-110 - DOI -
  • Female behavioral proceptivity functions as a probabilistic signal of female fertility, not female quality, in a New World primate.

    Horm. Behav. 73: 148-155 - DOI -
  • The stress of growing old: sex- and season-specific effects on allostatic load in wild grey mouse lemurs.

    Oecologia 178: 1063-1075 - DOI -
  • 20 Jahre endokrinologischer Elefantenservice - Bedeutung für Zoos und Europäische Erhaltungszuchtprogramme (EEPs).

    Elefanten in Zoo und Circus: Das Elefanten-Magazin 27:10-12 - DOI -
  • Personality, plasticity, and predation: linking endocrine and behavioural reaction norms in stickleback fish.

    Funct. Ecol. 29: 931-940 - DOI -
  • Body weight-associated differences in ovarian morphology in captive common marmoset (Callithrix jacchus).

    Anim. Reprod. Sci. 157: 44-55 - DOI -
  • Visible implant elastomer (VIE) tagging and simulated predation elicit similar physiological stress responses in three-spined stickleback Gasterosteus aculeatus.

    J. Fish Biol. 86: 1644-1649 - DOI -
  • Physiological stress levels in the endemic and endangered Udzungwa red colobus vary with elevation.

    Afr. Zool. 50: 23-30 - DOI -
  • Critical estradiol dose optimization for oocyte in vitro maturation in the common marmoset.

    Theriogenology 83: 1254-1263 - DOI -
  • Androgen correlates of male reproductive effort in wild male long-tailed macaques (Macaca fascicularis): A multi-level test of the challenge hypothesis.

    Physiol. Behav. 141: 143-153 - DOI -
  • Responses to social and environmental stress are attenuated by strong male bonds in wild macaques.

    P. Natl. Acad. Sci. USA (PNAS) 111: 18195-18200 - DOI -
  • Behavioral and physiological responses to fruit availability of spider monkeys ranging in a small forest fragment.

    Am. J. Primatol. 76: 1049-1061 - DOI -
  • Physiological and behavioural responses to weaning conflict in free-ranging primate infants.

    Anim. Behav. 97: 241-247 - DOI -
  • Costs of mate-guarding in wild male long-tailed macaques (Macaca fascicularis): Physiological stress and aggression.

    Horm. Behav. 66: 637-648 - DOI -
  • Habitat degradation and seasonality affect physiological stress levels of Eulemur collaris in littoral forest fragments.

    PloS One 9(9): e107698 - DOI -
  • Low female stress hormone levels are predicted by same- or opposite-sex sociality depending on season in wild Assamese macaques.

    Psychoneuroendocrinology 48: 19-28 - DOI -
  • Costs of and investment in mate-guarding in wild long-tailed macaques: influences of female characteristics and male-female social bonds.

    Int. J. Primatol. 35: 701-724 - DOI -
  • Lack of evidence for energetic costs of mate-guarding in wild male Assamese macaques (Macaca assamensis).

    Int. J. Primatol. 35: 677-700 - DOI -
  • Competition-induced stress does not explain deceptive alarm calling in tufted capuchin monkeys.

    Anim. Behav. 93: 49-58 - DOI -
  • The effect of fission-fuison zoo housing on hormonal and behavioral indicators of stress in Bornean orangutans (Pongo pygmaeus).

    Int. J. Primatol. 35: 509-528 - DOI -
  • Effects of habituation, research and ecotourism on faecal glucocorticoid metabolites in western lowland gorillas: Implications for conservation management.

    Biol. Conserv. 172: 72-79 - DOI -
  • Mate-guarding constrains feeding activity but not energetic status of wild male long-tailed macaques (Macaca fascicularis).

    Behav. Ecol. Sociobiol. 68: 583-595 - DOI -
  • Evaluating capture stress in wild gray mouse lemurs via repeated fecal sampling: method validation and the influence of prior experience and handling protocols on stress responses.

    Gen. Comp. Endocrinol. 195: 68-79 - DOI -
  • Cues to androgen and quality in male gibbon songs.

    PloS One 8(12): e82748 - DOI -
  • Effects of logging, hunting, and forest fragment size on physiological stress levels of two sympatric ateline primates in Colombia.

    Conserv. Physiol. 21(1): cot031 - DOI -
  • Methodological considerations in the analysis of fecal glucocorticoid metabolites in tufted capuchin monkeys (Cebus apella).

    Int. J. Primatol. 34: 879-898 - DOI -
  • Extra-pair paternity confirmed in wild white-handed gibbons.

    Am. J. Primatol. 75: 1185-1195 - DOI -
  • Signalling in multiple modalities in male rhesus macaques: sex skin coloration and barks in relation to androgen levels, social status and mating behavior.

    Behav. Ecol. Sociobiol. 67:1457-1469 - DOI -
  • Physiological stress hormone levels and mating behaviour are negatively correlated in male rhesus macaques (Macaca mulatta).

    Anim. Biol. 63: 331-341 - DOI -
  • Validation of an enzymeimmunoassay for assessing adrenocortical activity and evaluation of factors that affect levels of fecal glucocorticoid metabolites in two New World primates.

    Gen. Comp. Endocrinol. 191: 13-23 - DOI -
  • Long-term storage effects in steroid metabolite extracts from baboon (Papio sp.) faeces - a comparison of three commonly applied storage methods.

    Methods Ecol. Evol. 4: 493-500 - DOI -
  • Female fecal androgens prior to the mating season reflect readiness to conceive in reproductively quiescent wild macaques.

    Am. J. Phys. Anthropol. 151: 311-315 - DOI -
  • Effects of social status and stress on patterns of gastrointestinal parasitism in wild white-handed gibbons (Hylobates lar).

    Am. J. Phys. Anthropol. 150: 602-608 - DOI -
  • The endocrinology of male rhesus macaque social and reproductive status: a test of the challenge and social stress hypotheses.

    Behav. Ecol. Sociobiol. 67: 19-30 - DOI -
  • Male mating behavior in relation to female sexual swellings, socio-sexual behavior and hormonal changes in wild Barbary macaques.

    Horm. Behav. 63: 32-39 - DOI -
  • Non-invasive monitoring of physiological stress in the western lowland gorilla (Gorilla gorilla gorilla): Validation of a faecal glucocorticoid assay and methods for practical application in the field.

    Gen. Comp. Endocrinol. 179: 167-177 - DOI -
  • Do males time their mate-guarding effort with the fertile phase in order to secure fertilisation in Cayo Santiago rhesus macaques?

    Horm. Behav. 61: 696-705 - DOI -
  • Fecal androgen excretion and fetal sex effects during gestation in wild Assamese macaques (Macaca assamensis).

    Am. J. Phys. Anthropol. 147: 334-339 - DOI -
  • Information content of female copulation calls in wild long-tailed macaques (Macaca fascicularis).

    Behav Ecol Sociobiol 66: 121-134 - DOI -
  • Minimally invasive transabdominal collection of preimplantation embryos from the common marmoset monkey (Callithrix jacchus).

    Theriogenology 78(4): 811-816 - DOI -
  • Developmental expression of the pluripotency factor Sal-Like Protein 4 in the monkey, human and mouse testis: restriction to premeiotic germ cells.

    Cells Tissues Organs 196 (3): 206-220 - DOI -
  • Sexual signalling in female crested macaques.

    BMC Evolutionary Biology 12: 89 - DOI -
  • Sociodemographic correlates of fecal androgen levels in wild male white-handed gibbons (Hylobates lar).

    Int. J. Primatol. 33: 784-798 - DOI -
  • Field endocrinology: monitoring hormonal changes in free-ranging primates. In: Setchell J, Curtis D (eds): Field and laboratory methods in primatology, A practical guide.

    Cambridge University Press: 353-370. - DOI -
  • Species-specific patterns in fecal glucocorticoid and androgen levels in zoo-living orangutans (Pongo spp.).

    Gen. Comp. Endocrinol. 172: 446-457 - DOI -
  • Urinary C-peptide of insulin as a non-invasive marker of nutritional status: some practicalities.

    PLOS One 6 (7), e22398 - DOI -
  • Estrogen and progestogen correlates of the structure of female copulation calls in semi-free-ranging Barbary macaques (Macaca sylvanus).

    Int. J. Primatol. 32: 992-1006 - DOI -
  • The energetics of male-male endurance rivalry in rhesus macaques.

    Anim. Behav. 81: 1001-1007 - DOI -
  • Male competition and its hormonal correlates in Assamese macaques (Macaca assamensis).

    Horm. Behav. 59: 105-113 - DOI -
  • Do women´s voices provide cues of the likelihood of ovulation? The importance of sampling regime.

    PLOS One 6(9), e24490 - DOI -
  • Infant bystanders modulate the influence of ovarian hormones on female socio-sexual behaviour in free-ranging rhesus macaques.

    Behaviour 148: 1137-1155 - DOI -
  • Fecal glucocorticoid measurements and their relation to rearing, behaviour and environmental factors in the pileated gibbon population (Hylobates pileatus) held in European zoos.

    Int. J. Primatol. 32: 1161-1178 - DOI -
  • Upper respiratory tract disease in captive orangutans (Pongo sp.): prevalence in 20 European zoos and predisposing factors.

    J. Med. Primatol. 40: 365-375 - DOI -
  • Testing the Priority-of-Access model in a seasonally breeding primate species.

    Behav. Ecol. Sociobiol. 65: 1615-1627 - DOI -
  • The social correlates of self-directed behaviour and faecal glucocorticoid levels among adult male olive baboons (Papio hamadryas anubis) in Gashaka Gumti National Park, Nigeria.

    Afr. Zool. 46: 302-308 - DOI -
  • Immune function and HPA axis activity in free-ranging rhesus macaques.

    Physiol. Behav. 104: 507-514 - DOI -
  • Impacts of tourism on anxiety and physiological stress levels in wild male Barbary macaques.

    Biol. Conserv. 144: 2188-2193 - DOI -
  • Familiarity affects the assessment of female facial signals of fertility by free-ranging male rhesus macaques.

    Proc. R. Soc. B, 278: 3452-3458 - DOI -
  • You mate, I mate: Macaque females synchronize sex not cycles.

    PLOS One 6 (10), e26144 - DOI -
  • Urinary c-peptide measurement as a marker of nutritional status in macaques.

    PLOS One 6 (3), e18042 - DOI -
  • Concealed fertility and extended female sexuality in a non-human primate (Macaca assamensis).

    PLOS One 6 (8), e23105 - DOI -
  • Social capital and physiological stress levels in free-ranging adult female rhesus macaques.

    Physiol. Behav. 102: 76-83 - DOI -
  • Host intrinsic determinants and potential consequences of parasite infection in free-ranging red-fronted lemurs (Eulemur fulvus rufus).

    Am. J. Phys. Anthropol. 142: 441-452 - DOI -
  • Endocrine correlates of musth and the impact of ecological and social factors in free-ranging African elephants (Loxodonta africana).

    Horm. Behav. 57: 506-514 - DOI -
  • Infants as costly social tools in male Barbary macaque networks.

    Anim. Behav. 79: 1199-1204 - DOI -
  • Color signal information content and the eye of the beholder: a case study in the rhesus macaque.

    Behav. Ecol. 21: 739-746 - DOI -
  • Reproductive and life history parameters of wild female Macaca assamensis.

    Int. J. Primatol. 31: 501-517 - DOI -
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    Chicago, The University of Chicago Press: 447-468
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    Adv. Sci. Res. 5: 1-9 - DOI -
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    Horm. Behav. 55: 60-67 - DOI -
  • Mate-guarding as a male reproductive tactic in Propithecus verreauxi.

    Int. J. Primatol. 30: 389-409 - DOI -
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    Am. J. Primatol. 71: 529-538 - DOI -
  • Monitoring female reproductive status in white-handed gibbons (Hylobates lar) using fecal hormone analysis and patterns of genital skin swellings. In: Lappan S, Whittaker D, Geissmann T (eds): The gibbons: New perspectives on small ape socioecology and population biology.

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    Physiol. Behav. 98: 168-175 - DOI -
  • Sexual skin color contains information about the timing of the fertile phase in free-ranging Macaca mulatta.

    Int. J. Primatol. 30: 777-789 - DOI -
  • Rates of self-directed behaviour and faecal glucocorticoid levels are not correlated in female wild olive baboons (Papio hamadryas anubis).

    Stress 12: 526-532 - DOI -
  • Individual facial coloration in male Eulemur fulvus rufus: A condition-dependent ornament?

    Int. J. Primatol. 30: 859-75 - DOI -
  • Seasonal and inter-individual variation in testosterone levels in badgers (Meles meles): evidence for the existence of two endocrinological phenotypes.

    J. Comp. Physiol. A 195: 865-871 - DOI -
  • Female ovarian cycle phase affects the timing of male sexual activity in free-ranging Barbary macaques (Macaca sylvanus) of Gibraltar.

    Am. J. Primatol. 70: 44-53 - DOI -
  • Dominance, aggression and physiological stress in wild male Assamese macaques (Macaca assamensis).

    Horm. Behav. 54: 613-619 - DOI -
  • Female Barbary macaque (Macaca sylvanus) copulation calls do not reveal the fertile phase but influence mating outcome.

    Proc. R. Soc. B 275: 571-578 - DOI -
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    Behav. Ecol. Sociobiol. 62: 627-638 - DOI -
  • Mating patterns and sexual swellings in pair-living and multimale groups of wild white-handed gibbons, Hylobates lar.

    Anim. Behav. 75: 991-1001 - DOI -
  • Baboon sexual swellings: information content of size and color.

    Horm. Behav.. 53: 452-462 - DOI -
  • Urinary glucocorticoid levels in relation to socio-behavioral and reproductive parameters in captive-housed male chimpanzees

    Primate Report 75: 19-32
  • Female white-handed gibbons (Hylobates lar) lead group movements and have priority of access to food resources.

    Behaviour 145: 965-981 - DOI -
  • Sex-specific reproductive behaviours and paternity in free-ranging Barbary macaques (Macaca sylvanus).

    Behav. Ecol. Sociobiol. 62(9): 1453-1466 - DOI -
  • Male Barbary macaques eavesdrop on mating outcome: a playback study.

    Anim. Behav. 75: 1885-1891 - DOI -
  • The timing of ovulation with respect to sexual swelling detumescence in wild olive baboons.

    Primates 49: 295-299 - DOI -
  • Monitoreo no-invasivo de animales silvestres - análisis genéticos y endocrinológicos a base de muestras fecales en 'pichicos barba blanca' (Saguinus mystax, Callitrichidae, Primates) en la Estación Biológica Quebrada Blanco (EBQB), Perú. In: Bodmer RE, Puertas P (eds): Memoria VI Congreso sobre Manejo de Fauna silvestre en Amazonia y Latinoamerica. Iquitos.

    Wildlife Conservation Society: 78-84
  • Post-conception mating in wild long-tailed macaques (Macaca fascicularis): characterization, endocrine correlates and functional significance.

    Horm. Behav. 51: 3-10 - DOI -
  • Sexual swellings in wild white-handed gibbon females (Hylobates lar) indicate the probability of ovulation.

    Horm. Behav. 51: 221-230 - DOI -
  • Influence of reproductive season and rank on fecal glucocorticoid levels in free-ranging male Verreaux´s sifakas (Propithecus verreauxi).

    Horm. Behav. 51: 640-648 - DOI -
  • Female sexual behavior and sexual swelling size as potential cues for males to discern the female fertile phase in free-ranging Barbary macaques (Macaca sylvanus) of Gibraltar.

    Horm. Behav. 52: 375-383 - DOI -
  • Grooming in Barbary macaques: better to give than to receive?

    Biol. Lett.-UK 3: 231-233 - DOI -
  • The impact of ecological variability on the reproductive endocrinology of wild female African elephants.

    Horm. Behav. 51: 346-354 - DOI -
  • Reduced reproductive function in wild baboons (Papio hamadryas anubis) related to natural consumption of the African black plum (Vitex doniana).

    Horm. Behav. 52: 384-390 - DOI -
  • A case study: Fecal corticosteroid and behavior as indicators of welfare during relocation of an Asian elephant.

    Journal of Applied Animal Welfare Science 10: 349-358 - DOI -
  • Determinants of male reproductive success in wild long-tailed macaques (Macaca fascicularis) – male monopolisation, female mate choice or post-copulatory mechanisms?

    Behav. Ecol. Sociobiol. 59: 740-752 - DOI -
  • Coat condition, housing condition and measurement of faecal cortisol metabolites – A non-invasive study about alopecia in captive rhesus macaques (Macaca mulatta).

    J. Med. Primatol. 35: 3-11 - DOI -
  • Comparison of different enzymeimmunoassays for assessment of adrenocortical activity in primates based on fecal analysis.

    Am. J. Primatol. 68: 257-273 - DOI -
  • Effects of human pituitary FSH isoforms on mouse follicles in vitro.

    RBM online 12(4): 428-441 - DOI -
  • Reproductive cycles and mating patterns in female Barbary macaques. In: Hodges JK, Cortes J (eds): The Barbary Macaque: Biology, Management and Conservation.

    NottinghamUniversity Press, Nottingham: 95-108
  • The sexually active states of free-ranging male African elephants (Loxodonta africana): Defining musth and non-musth using endocrinology, physical signals and behaviour.

    Horm. Behav. 47: 83-91 - DOI -
  • Female sexual behavior, but not sex skin swelling, reliably indicates the timing of the fertile phase in wild long-tailed macaques (Macaca fascicularis).

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  • Physical, physiological and behavioural correlates of musth in captive African elephants (Loxodonta africana).

    Physiol. Biochem. Zool. 78(4): 505-514 - DOI -
  • Patterns of anogenital swelling size and their endocrine correlates during ovulatory cycles and early pregnancy in free-ranging Barbary macaques (Macaca sylvanus) of Gibraltar.

    Am. J. Primatol. 66: 351-368 - DOI -
  • Certain aspects of Bonobo female sexual repertoire are related to urinary testosterone metabolite levels.

    Folia Primatol. 76: 21-32 - DOI -
  • Characterization and social correlates of fecal testosterone and cortisol excretion in wild male Saguinus mystax

    Int. J. Primatol. 26: 159-179 - DOI -
  • Male dominance rank, female mate choice and male mating and reproductive success in captive chimpanzees (Pan troglodytes).

    Int. J. Primatol. 26: 357-384 - DOI -
  • A pair choice test to identify female mating pattern relative to ovulation in longtailed macaques (Macaca fascicularis).

    Anim. Behav. 70: 1283-96 - DOI -