Publications

2020

Dolotovskaya S, Walker S, Heymann EW (2020) What makes a pair bond in a Neotropical primate: female and male contributions. Royal Society Open Science 7: 191489.

Dueker S, Kupsch D, Bobo SK, Heymann EW, Waltert M (2020) Congo Grey Parrot Psittacus erithacus densities in oil palm plantation, agroforestry mosaic and protected forest in Southwest Cameroon. Bird Conservation International 30: 156-167. 

2019

Binczik A, Roig-Boixeda P, Heymann EW, Waltert M (2019) Conservation of chimpanzees and other primates depends on forest patches in a West African savannah landscape. Oryx: 774-781.

Dolotovskaya S, Flores Amasifuen C, Haas CE, Nummert F, Heymann EW (2019) Active anti-predator behaviour of red titi monkeys (Plecturocebus cupreus). Primate Biology 6: 59–64.

Gelmi-Candusso TA, Bialozyt R, Slana D, Zárate Gómez R, Heymann EW, Heer K (2019) Estimating seed dispersal distance: A comparison of methods using animal movement and plant genetic data on two primate-dispersed Neotropical plant species. Ecology and Evolution 9: 8965–8977.

Heymann EW (2019) Book Review: Primates in Flooded Forests: Ecology and Conservation. International Journal of Primatology 40  744–746.

Heymann EW (2019) Editorial: Ecotropica is back. Ecotropica 21: 201901.

Heymann EW, Culot L, Knogge C, Smith AC, Tirado Herrera ER, Müller B, Stojan-Dolar M, Lledo Ferrer Y, Kubisch P, Kupsch D, Slana D, Koopmann ML, Ziegenhagen B, Bialozyt R, Mengel C, Hambuckers J, Heer K (2019) Small Neotropical primates promote the natural regeneration of anthropogenically disturbed areas. Scientific Reports 9:10356.

Souza-Alves JP, Mourthe I, Hilário RR, Bicca-Marques JC, Rehg J, Gestich CC, Acero-Murcia AC, Adret P, Aquino R, Berthet M, Bowler M, Calouro AM, Canale GR, Cardoso NdA, Caselli CB, Cäsar C, Chagas RRD, Clyvia A, Corsini CF, Defler T, Deluycker A, Di Fiore A, Dingess K, Erkenswick G, Ferreira MA, Fernandez-Duque E, Ferrari SF, Fontes IP, Gomes JD, Gonçalves FPR, Guerra M, Haugaasen T, Heiduck S, Heymann EW, Hodges S, Huashuayo-Llamocca R, Jerusalinsky L, Kasper CB, Lawrence J, Lueffe TM, Lopes KGD, Martínez J, Melo FR de, Messias MR, Nagy-Reis MB, Nole I, Pacięncia F, Palacios E, Poirier A, Porfírio G, Porter A, Price E, Printes RC, Quintino EP, Reis EA, Rocha A, Rodríguez A, Röhe F, Rumiz D, Shanee S, Santana MM, Setz EZF, Souza FSC de, Spironello W, Tirado Herrera ER, Vinhas L, Vulinec K, Wallace RB, Watsa M, Wright PC, Young RJ, Barnett AA (2019) Terrestrial Behavior in Titi Monkeys (Callicebus, Cheracebus, and Plecturocebus): Potential Correlates, Patterns, and Differences between Genera. International Journal of Primatology 40: 553-572.

2018

Culot L, Huynen M-C, Heymann EW (2018) Primates and dung beetles: two dispersers are better than one in secondary forest. International Journal of Primatology 39: 397-414.

Göbel M, Heymann EW (2018) Ecological observations on the primates of the Area de Conservación Privada Panguana, Peruvian Amazonia. Neotropical Primates 24:49-55.

Heymann EW (2018) Tamarine – die etwas anderen Primaten. Biologie in unserer Zeit 49: 113-118.

Lüffe TM, Tirado Herrera ER, Nadjafzadeh M, Berles P, Smith AC, Knogge C, Heymann EW (2018) Seasonal variation and an “outbreak” of frog predation by tamarins. Primates 59: 549-552.

Stojan-Dolar M, Flores Amasifuén C, Heymann EW (2018) A failed immigration attempt by a moustached tamarin, Saguinus mystax. Neotropical Primates 24: 27-29.

2017

Estrada A, Garber PA, Rylands AB, Roos C, Fernandez-Duque E, Di Fiore A, Nekaris KAI, Nijman V, Heymann EW, Lambert JE, Rovero F, Barelli C, Setchell JM, Gillespie TR, Mittermeier RA, Arregoitia LV, de Guinea M, Gouveia S, Dobrovolski R, Shanee S, Shanee N, Boyle S, Fuentes A, MacKinnon KC, Amato KR, Meyer ALS, Wich S, Sussman RW, Pan R, Kone I, Li B (2017) Impending extinction crisis of the world’s primates: why primates matter. Science Advances 3: e1600946.

Flores Amasifuén C, Heymann EW (2017) Toucan predation attempt on a Neotropical pygmy squirrel. Mammalia 81: 527-528.

Gelmi-Candusso T, Heymann EW, Heer K (2017) Effects of zoochory on the spatial genetic structure of plant populations. Molecular Ecology 26: 5896–5910.

Heymann EW (2017) Forest regeneration (role of primates in). In: The International Encyclopedia of Primatology. Fuentes A (ed). Springer, New York, pp 428-429.

Heymann EW, Culot L, Knogge C, Noriega Piña TE, Tirado Herrera ER, Klapproth M, Zinner D (2017) Long-term consistency in spatial patterns of primate seed dispersal. Ecology and Evolution 7: 1435-1441.

Huashuayo-Llamocca R, Heymann EW (2017) Fur-rubbing with Piper leaves in the San Martín titi monkey, Callicebus oenanthe. Primate Biology 4: 127-130.

2016

Corso J, Bowler M, Heymann EW, Roos C, Mundy NI (2016) Highly polymorphic colour vision in a New World monkey with red facial skin, the bald uakari (Cacajao calvus). Proceedings of the Royal Society B 283: 20160067.

Heymann EW (2016) Helper at the nest among nonhuman primates. In: Shackelford TK und Weekes-Shackelford V. A. (Hg.): Encyclopedia of Evolutionary Psychological Science.: Springer International Publishing Switzerland.

Heymann EW (2016) Speaking of which: odour communication in tamarins. In: The missing lemur link: ancestral steps in human evolution. Palagi E, Norscia I (eds.) Cambridge University Press, Cambridge: 9-13.

Nevo O, Heymann EW, Schulz S, Ayasse M (2016) Fruit odor as a ripeness signal for seed-dispersing primates? A case study on four Neotropical plant species. Journal of Chemical Ecology 42: 323-328.

Rylands AB, Heymann EW, Matauschek C, Lynch Alfaro J, Roos C, Buckner J, Boubli JP, Sampaio R, Mittermeier RA (2016) Taxonomic review of the New World tamarins (Primates: Callitrichidae). Zoological Journal of the Linnean Society 177: 1003-1028.

2015

Culot L, Huynen M-C, Heymann EW (2015) Partitioning the relative contribution of one-phase and two-phase seed dispersal when evaluating seed dispersal effectiveness. Methods in Ecology and Evolution 6: 178-186.

Heymann EW, Ganzhorn JU (2015) History of primate behavioural and ecological field research at the German Primate Center. Primate Biology 2: 73–80.

Heymann EW, Hsia SS (2015) Unlike fellows – a review of primate–non-primate associations. Biological Reviews 90: 142-156.

Kulp J, Heymann EW (2015) Ranging, activity budget and diet composition of red titi monkeys (Callicebus cupreus) in primary forest and forest edge. Primates 56: 273-278.

Nevo O, Heymann EW (2015) Led by the nose: olfaction in primate foraging ecology. Evolutionary Anthropology 24: 137-148.

Nevo O, Orts Garri R, Hernandez Salazar LT, Schulz S, Heymann EW, Ayasse M, Laska M (2015) Chemical recognition of fruit ripeness in spider monkeys (Ateles geoffroyi). Scientific Reports 5: 14895.

2014

Aquino R, López L, García G, Heymann EW (2014) Diversity, abundance and habitats of primates on the Río Curaray, Peruvian Amazonia. Primate Conservation 28: 1-8

Bialozyt R, Flinkerbusch S, Niggemann M, Heymann EW (2014) Predicting seed shadows of a Neotropical tree species by primates using an agent based model with internal decision-making on movement. Ecological Modelling 278:74-84.

Bialozyt R, Luettmann K, Michalczyk IM, Pinedo Saboya PP, Ziegenhagen B, Heymann EW (2014) Primate seed dispersal leaves spatial genetic imprint throughout subsequent life stages of the Neotropical tree Parkia panurensis. Trees, Structure and Function 28: 1569-1575.

Heymann EW, Wörner LLB, Ziegenhagen B, Bialozyt R (2014) Research trails affect the abundance of an epiphytic tropical bromeliad. Biotropica 46: 166-169

Kupsch D, Waltert M, Heymann EW (2014) Forest type affects prey foraging of saddleback tamarins, Saguinus nigrifrons. Primates 55: 403-413.

Rimbach R, Link A, Montes-Rojas A, Di Fiore A, Heistermann M, Heymann EW (2014) Behavioral and physiological responses to fruit availability of spider monkeys ranging in a small forest fragment. American Journal of Primatology 76: 1049-1061.

Ripperger SP, Heymann EW, Tschapka M, Kalko EKV (2014) Fruit characteristics associated with fruit preferences in frugivorous bats (Phyllostomidae: Stenodermatinae and Carolliinae) and saddle-back tamarins (Saguinus fuscicollis) in Perú. Ecotropica 20: 53-64.

2013

Aquino R, Cornejo FM, Heymann EW (2013) Primate abundance and habitat preferences on the lower Urubamba and Tambo rivers, central-eastern Peruvian Amazonia. Primates 54: 377-383.

Aquino R, Cornejo FM, Pezo E, Heymann EW (2013) Distribution and abundance and of white-fronted spider monkeys, Ateles belzebuth (Atelidae), and threats to its survival in Peruvian Amazonia. Folia Primatologica. 84: 1–10.

Bicca-Marques JC, Heymann EW (2013) Ecology and behavior of titi monkeys, genus Callicebus. In: Evolutionary Biology and Conservation of Titis, Sakis and Uacaris. Veiga LM, Barnett AA, Ferrari SF, Norconk MA (eds). Cambridge: Cambridge University Press: 196-207

Heymann EW (2013) Can Seeds Help to Expel Parasites? A Comment on the Garber-Kitron (1997) Hypothesis. International Journal of Primatology 34: 445-449.

Heymann EW, Nadjafzadeh M (2013) Insectivory and prey foraging in titi monkeys - a case study of Callicebus cupreus and a comparison to other pitheciids. In: Evolutionary Biology and Conservation of Titis, Sakis and Uacaris. Veiga LM, Barnett AA, Ferrari SF, Norconk MA (eds). Cambridge: Cambridge University Press: 215-224 PDF

Heymann EW, Zinner D, Ganzhorn JU (2013) Disproportional representation of primates in the ecological literature. PLoS ONE 8:e80763.

Rimbach R, Heymann EW, Link A, Heistermann M (2013) Validation of an enzyme immunoassay for assessing adrenocortical activity and evaluation of factors that affect levels of fecal glucocorticoid metabolites in two New World primates. General and Comparative Endocrinology 191: 13-23.

Rimbach R, Link A, Heistermann M, Gómez-Posada C, Galvis N, Heymann EW (2013) Effects of logging, hunting, and forest fragment size on physiological stress levels of two sympatric ateline primates in Colombia. Conservation Physiology 1 (1).

West KA, Heymann EW, Müller B, Gillespie TR (2013) Patterns of infection with Cryptosporidium sp. and Giardia sp. in three species of free-ranging primates in the Peruvian Amazon. International Journal of Primatology 34: 939-945.

2012

Alvarez SJ, Heymann EW (2012) Brief Communication: A preliminary study on the influence of physical fruit traits on fruit handling and seed fate by white-handed titi monkeys (Callicebus lugens). American Journal of Physical Anthropology 147: 482-488.

Bowler M, Knogge C, Heymann EW, Zinner D (2012) Multi-level societies in New World primates? Flexibility may characterise the organisation of Peruvian red uakaris Cacajao calvus ucayalii. International Journal of Primatology 33: 1110-1124.

Heymann EW, Lüttmann K, Michalczyk IM, Pinedo Saboya PP, Ziegenhagen B, Bialozyt R (2012) DNA fingerprinting validates seed dispersal curves from observational studies in three species of the Neotropical legume Parkia. PLoS ONE 7: e35480.

Heymann EW, Pérez Yamacita JG, Müller B (2012) Morphometric data from a wild female titi monkey, Callicebus cupreus. Neotropical Primates 19: 42-43.

Lledo-Ferrer Y, Pelàez F, Heymann EW (2012) Territorial polemics: a response to Roberts. International Journal of Primatology 33: 762-768.

2011

Culot L, Lledo-Ferrer Y, Hoelscher O, Muñoz Lazo FJJ, Huynen M-C, Heymann EW (2011) Reproductive failure, maternal infanticide and cannibalism in wild moustached tamarins, Saguinus mystax. Primates 52: 179-186.

Culot L, Mann DJ, Muñoz Lazo FJJ, Huynen M-C, Heymann EW (2011) Tamarins and dung beetles: an efficient diplochorous dispersal system in the Peruvian Amazonia. Biotropica 43: 84-92.

Heymann EW (2011) Coordination in primate mixed-species troops. In: Boos M, Kolbe M, Kappeler PM, Ellwart T (eds) Coordination in Human and Non-Human Primate Groups. Springer, Heidelberg: 263-281.

Heymann EW (2011) Florivory, nectarivory and pollination - a review of primate-flower interactions. Ecotropica 17: 41-52.

Heymann EW, Flores Amasifuén C, Shahuano Tello N, Tirado Herrera ER, Stojan-Dolar M (2011) Disgusting appetite: two-toed sloths feeding in human latrines. Mammalian Biology 76: 84-86.

Heymann EW, Shahuano Tello N, Hölscher O (2011) A wild tamarin without a foot - survival despite a handycap. Neotropical Primates 18: 59-60.

Lledo Ferrer Y, Pelaez F, Heymann EW (2011) The equivocal relationship between territoriality and scent-marking in wild saddleback tamarins, Saguinus fuscicollis. International Journal of Primatology 32: 974-991.

Matauschek C, Roos C, Heymann EW (2011) Mitochondrial phylogeny of tamarins (Saguinus, Hoffmannsegg 1807) with taxonomic implications for the S. nigricollis species group. American Journal of Physical Anthropology 144: 564-574.

Muñoz Lazo FJJ, Culot L, Huynen M-C, Heymann EW (2011) Effect of resting patterns of tamarins (Saguinus fuscicollis and Saguinus mystax) on the spatial distribution of seeds and seedling recruitment. International Journal of Primatology 32: 223-237.

Rylands AB, Mittermeier RA, Heymann EW, Matauschek C, Aquino R, Encarnación F, de la Torre S (2011) The range of the golden-mantle tamarin, Saguinus tripartitus (Milne Edwards, 1878): distributions and sympatry of four tamarins in Colombia, Ecuador and Northern Peru. Primates 52: 25-39.

2010

Culot L, Muñoz Lazo FJJ, Huynen M-C, Poncin P, Heymann EW (2010) Seasonal variation in seed dispersal by tamarins alters seed rain in a secondary rainforest. International Journal of Primatology 31: 553-569.

Heymann EW, Aquino R (2010) Peruvian red uakaris, Cacajao calvus ucayalii, are not flooded-forest specialists. International Journal of Primatology 31: 751-758.

Luettmann K, Michalczyk IM, Mengel C, Ziegenhagen B, Heymann EW, Pinedo Saboya PP, Bialozyt R (2010) Characterization of nuclear microsatellite loci in the neotropical tree Parkia panurensis (Fabaceae). American Journal of Botany 97: e34-36.

Müller B, Mätz-Rensing K, Pérez Yamacita JG, Heymann EW (2010) Pathological and parasitological findings in a wild red titi monkey, Callicebus cupreus (Pitheciidae, Platyrrhini). European Journal of Wildlife Research 56: 601-604.

Nyakatura JA, Heymann EW (2010) Effects of support size and orientation on symmetric gaits in free-ranging tamarins of Amazonian Peru: implications for the functional significance of primate gait sequence patterns. Journal of Human Evolution 58: 242-251.

Stojan-Dolar M, Heymann EW (2010) Functions of intermittent locomotion in mustached tamarins (Saguinus mystax). International Journal of Primatology 31: 677-692.

Stojan-Dolar M, Heymann EW (2010) Vigilance of mustached tamarins in single-species and mixed-species groups – the influence of group composition. Behavioral Ecology and Sociobiology 64: 325-335.

Stojan-Dolar M, Heymann EW (2010) Vigilance in a cooperatively breeding primate. International Journal of Primatology 31: 95-116.

Wenz A, Heymann EW, Petney TN, Taraschewski HF (2010) The influence of human settlements on the parasite community in two species of Peruvian tamarin. Parasitology 137: 675-684.

2009

Alvarez SJ, Heymann EW (2009) Forrajeo de insectos por la viudita (Callicebus lugens). In: Alarcón-Nieto G, Palacios E (eds) Estación Biológica Mosiro Itajura-Caparú - Biodiversidad en el Territorio del Yaigojé-Apaporis. Conservación Internacional, Bogotá: 65-70.

Aquino R, Cornejo FM, Pezo Lozano E, Heymann EW (2009) Geographic distribution and demography of Pithecia aequatorialis (Pitheciidae) in Peruvian Amazonia. American Journal of Primatology 71: 964-968.

Cornejo FM, DeLuycker AM, Quintana H, Pacheco V, Heymann EW (2009) Peruvian yellow-tailed woolly monkey Oreonax flavicauda (Humboldt, 1812). In: Mittermeier RA, Wallis J, Rylands AB, Ganzhorn JU, Oates JF, Williamson EA, Palacios E, Heymann EW, Kierulff MCM, Long Y, Supriatna J, Roos C, Walker S, Cortés-Ortiz L, Schwitzer C (eds) Primates in Peril: the World's 25 most Endangered Primates 2008-2010. IUCN/SSC Primate Specialist Group (PSG), International Primatological Society (IPS), and Conservation International (CI), Arlington/VA: 74-76.

Culot L, Huynen M-C, Gérard P, Heymann EW (2009) Short-term post-dispersal fate of seeds defecated by two small primates in the Amazonian forest of Peru. Journal of Tropical Ecology 25: 229-238.

Heymann EW, von der Lage F (2009) Non-invasive measuring of operational tongue length in callitrichids. American Journal of Physical Anthropology 139: 430-433.

Lledo-Ferrer Y, Hidalgo A, Heymann EW, Peláez F (2009) Field observation of predation of a slate-colored hawk, Leucopternis schistacea, on a juvenile saddle-back tamarin, Saguinus fuscicollis. Neotropical Primates 16: 82-84.

2008

Aquino R, Terrones W, Cornejo F, Heymann EW (2008) Geographic distribution and possible taxonomic distinction of Callicebus torquatus populations (Pitheciidae: Primates) in Peruvian Amazonia. American Journal of Primatology 70: 1181-1186.

Heymann EW (2008) Ressourcennutzung bei nicht-menschlichen Primaten. In: Knopf T (ed) Umweltverhalten in Geschichte und Gegenwart. Vergleichende Ansätze aus Geistes- und Naturwissenschaften. Attempto Verlag, Tübingen: 19-29.

Nadjafzadeh MN, Heymann EW (2008) Prey foraging of red titi monkeys, Callicebus cupreus, in comparison to sympatric tamarins, Saguinus mystax and Saguinus fuscicollis. American Journal of Physical Anthropology 135: 56-63.

Shahuano Tello N, Stojan-Dolar M, Heymann EW (2008) A sight and video record of the oilbird, Steatornis caripensis, in Peruvian lowland Amazonia. Journal of Ornithology 149: 267-269.

2007

Heymann EW (2007) Biologische Grundlagen von Familien - Familien bei Primaten. In: Resch F, Schulte-Markwort M (eds) Kursbuch für integrative Kinder- und Jugendpsychotherapie, Band 4 - Schwerpunkt: Familie. Beltz: Weinheim: 3-17.

Huck M, Roos C, Heymann EW (2007) Spatio-genetic population structure in moustached tamarins, Saguinus mystax. American Journal of Physical Anthropology 132: 576-583.

Löttker P, Huck M, Zinner DP, Heymann EW (2007) Grooming relationships between breeding females and adult group members in a cooperatively breeding primate. American Journal of Primatology 69: 1159-1172.

Mittermeier RA, Ratsimbazafy J, Rylands AB, Williamson L, Oates JF, Mbora D, Ganzhorn JU, Rodríguez-Luna E, Palacios E, Heymann EW, Kierulff MCM, Yongcheng L, Supriatna J, Roos C, Walker S, Aguiar JM (2007) Primates in Peril. The world's 25 most endangered primates 2006-2008. Primate Conservation 22: 1-40.

Smith AC, Knogge C, Huck M, Löttker P, Buchanan-Smith HM, Heymann EW (2007) Long term patterns of sleeping site use in wild saddleback (Saguinus fuscicollis) and mustached tamarins (S. mystax). American Journal of Physical Anthropology 134: 340-353.

2006

Heymann EW (2006) Scent marking strategies of New World primates. American Journal of Primatology 68: 650-661.

Heymann EW (2006) Introduction: the neglected sense - olfaction in primate behaviour, ecology, and evolution. American Journal of Primatology 68: 519-524.

2005

Huck M, Löttker P, Böhle U-R, Heymann EW (2005) Paternity and kinship patterns in polyandrous moustached tamarins (Saguinus mystax). American Journal of Physical Anthropology 127: 449-464.

Huck M, Löttker P, Heymann EW, Heistermann M (2005) Characterization and social correlates of fecal testosterone and cortisol excretion in wild male moustached tamarins (Saguinus mystax). International Journal of Primatology 26: 159-179.

Nunn CL, Heymann EW (2005) Malaria infection and host behaviour: a comparative study of neotropical primates. Behavioral Ecology and Sociobiology 59: 30-37.

2004

Heymann EW (2004) Conservation categories of Peruvian primates - categorias de conservación de los primates peruanos. Neotropical Primates 12: 154-155.

Huck M, Löttker P, Heymann EW (2004) The many faces of helping: possible costs and benefits of infant carrying and food transfer in moustached tamarins (Saguinus mystax). Behaviour 141: 915-934.

Huck M, Löttker P, Heymann EW (2004) Proximate mechanisms of reproductive monopolization in male moustached tamarins (Saguinus mystax). American Journal of Primatology 64: 39-56.

Huck M, Löttker P, Heymann EW, Heistermann M (2004) Aspects of the behavioural and endocrine ontogeny of six wild immature male moustached tamarins (Callitrichidae). Neotropical Primates 12: 131-135.

Löttker P, Huck M, Heymann EW (2004) Demographic parameters and events in wild moustached tamarins (Saguinus mystax). American Journal of Primatology 64: 425-449.

Löttker P, Huck M, Heymann EW, Heistermann M (2004) Endocrine correlates of reproductive status in breeding and non-breeding wild female moustached tamarins, Saguinus mystax. International Journal of Primatology 25: 919-937.

Terrones Ruíz WI, Vela Diaz DM, Flores Amasifuén C, Heymann EW (2004) Birth of a wild red titi monkey, Callicebus cupreus, at the Estación Biológica Quebrada Blanco. Neotropical Primates 12: 15-16.

Tirado Herrera ER, Heymann EW (2004) Does mom need more protein? Preliminary observations on differences in diet composition in a pair of red titi monkeys, Callicebus cupreus. Folia Primatologica 75: 150-153.

Tirado Herrera ER, Heymann EW (2004) Behavioural changes in response to an injured group member in a group of wild moustached tamarins (Saguinus mystax). Neotropical Primates 12: 13-15.

2003

Heymann EW(2003) Scent marking, paternal care, and sexual selection in callitrichines. In: Jones CB (ed) Sexual Selection and Reproductive Competition in Primates: New Perspectives and Directions. Special Topics in Primatology. Vol. 3. American Society of Primatologists, Norman: 305-325.

Heymann EW (2003) New World monkeys. II. Marmosets, tamarins, and Goeldi's monkey (Callitrichidae). In: Kleiman DG, Geist V, Hutchins M, McDade M (eds) Grzimek's Animal Life Encyclopedia. Vol. 14. Gale Group, Farmington Hills/MI: 115-133.

Heymann EW (2003) Monogamy in New World primates - what can patterns of olfactory communication tell us? In: Reichard U, Boesch C (eds) Monogamy: Mating Strategies and Partnerships in Birds, Humans and Other Mammals. Cambridge University Press, Cambridge: 248-261.

Heymann EW, Canaquin Y (2003) Primatologische Beobachtungen am Río Curaray, Nord-Peru. Natur und Museum 133: 61-75.

Knogge C, Heymann EW (2003) Seed dispersal by sympatric tamarins, Saguinus mystax and Saguinus fuscicollis: diversity and characteristics of plant species. Folia Primatologica 74: 33-47.

Knogge C, Tirado Herrera ER, Heymann EW (2003) Effects of passage through tamarin guts on the germination potential of dispersed seeds. International Journal of Primatology 24: 1121-1128.

Tirado Herrera ER, Franke T, Knogge C, Skrabal J, Heymann EW (2003) Flower and fruit visitors of Marcgravia longifolia in Amazonian Peru. Plant Biology 5: 210-214.

2002

Heymann EW (2002) Brazilian researchers detect rabies transmission from common marmosets to humans. Neotropical Primates 10: 28-29.

Heymann EW, Encarnación F, Canaquin JE (2002) Primates of the Río Curaray, Northern Peruvian Amazon. International Journal of Primatology 23: 191-201.

Heymann EW, Encarnación F, Soini P (2002) On the diagnostic characters and geographic distribution of the 'yellow handed' titi monkey, Callicebus lucifer, in Peru. Neotropical Primates 10: 124-126.

Shahuano Tello N, Huck M, Heymann EW (2002) Boa constrictor attack and group defense in moustached tamarins (Saguinus mystax). Folia Primatologica 73: 146-148.

Tirado Herrera ER, Vulinec K, Knogge C, Heymann EW (2002) Sit and wait at the source of dung - an unusual strategy of dung beetles. Ecotropica 8: 87-88.

2001

Heymann EW (2001) Interspecific variation of scent marking behaviour in wild tamarins, Saguinus mystax and Saguinus fuscicollis. Folia Primatologica 72: 253-267.

Heymann EW (2001) Can phenology explain the scarcity of folivory in New World primates? American Journal of Primatology 55: 171-175.

Oversluijs Vasquez MR, Heymann EW (2001) Crested eagle (Morphnus guianensis) predation on infant tamarins (Saguinus mystax and Saguinus fuscicollis, Callitrichinae). Folia Primatologica 72: 301-303.

Smith AC, Tirado Herrera ER, Buchanan-Smith HM, Heymann EW (2001) Multiple breeding females and allo-nursing in a wild group of moustached tamarins (Saguinus mystax). Neotropical Primates 9: 67-69.

Zinner D, Knogge C, Heymann EW, Kappeler PM (2001) Large primate aggregations: limits to female-female networks? Primate Report 60-1: 47-48.

2000

Heymann EW (2000) The number of adult males in callitrichine groups and its implication for callitrichine social evolution. In: Kappeler PM (ed) Primate Males - Causes and Consequences of Variation in Group Composition. Cambridge University Press, Cambridge: 64-71.

Heymann EW (2000) Spatial patterns of scent-marking in wild moustached tamarins, Saguinus mystax: no evidence for a territorial function. Animal Behaviour 60: 723-730.

Heymann EW (2000) Field observations of the golden-mantled tamarin, Saguinus tripartitus, on the Río Curaray, Peruvian Amazonia. Folia Primatologica 71: 392-398.

Heymann EW, Buchanan-Smith HM (2000) The behavioural ecology of mixed-species troops of callitrichine primates. Biological Reviews 75: 169-190.

Heymann EW, Knogge C, Tirado Herrera ER (2000) Vertebrate predation by sympatric tamarins, Saguinus mystax and Saguinus fuscicollis. American Journal of Primatology 51: 153-158.

Tirado Herrera ER, Knogge C, Heymann EW (2000) Infanticide in a group of wild saddle-back tamarins, Saguinus fuscicollis. American Journal of Primatology 50: 153-157.

1999

Heymann EW (1999) Primate behavioural ecology and diseases - some perspectives for a future primatology. Primate Report 55: 53-65.

Heymann EW, Soini P (1999) Offspring number in Cebuella pygmaea in relation to group size and the number of adult males. Behavioral Ecology and Sociobiology 46: 400-404.

1998

Encarnación F, Heymann EW (1998) Body mass of wild Callimico goeldii. Folia Primatologica 69: 368-371.

Heymann EW (1998) Spatial patterns of scent-marking in wild Saguinus mystax. Folia Primatologica 69: 233.

Heymann EW (1998) Sex differences in olfactory communication in wild Saguinus mystax. Folia Primatologica 69: 201-202.

Heymann EW (1998) Sex differences in olfactory communication in a primate, the moustached tamarin, Saguinus mystax (Callitrichinae). Behavioral Ecology and Sociobiology 43: 37-45.

Heymann EW (1998) Giant fossil New World primates: arboreal or terrestrial? Journal of Human Evolution 34: 99-101.

Heymann EW, Holighaus K (1998) Der 'Faktor Mensch': der Einfluß von Tierpflegern auf das Verhalten von Lisztaffen, Saguinus oedipus (Callitrichinae). Zoologischer Garten 68: 222-230.

Heymann EW, Knogge C, Tirado ER, Smith AC (1998) Unter Affengnomen im Amazonasregenwald - Freilandforschung an Tamarinen in Peru. Zeitschrift des Kölner Zoo 41: 63-84.

Knogge C, Heymann EW, Tirado ER (1998) Seed dispersal of Asplundia peruviana (Cyclanthaceae) by the primate Saguinus fuscicollis. Journal of Tropical Ecology 14: 99-102.

Sánchez S, Peláez F, Kaumanns W, Heymann EW (1998) Mothers of cotton-top tamarins (Saguinus oedipus) benefit from helping behaviour. Folia Primatologica 69: 212.

Tirado Herrera ER, Heymann EW (1998) A possible case of myiasis in a wild moustached tamarin, Saguinus mystax (Callitrichinae, Cebidae). Journal of Medical Primatology 27: 271-272.

1997

Heymann EW (1997) The relationship between body size and mixed-species troops of tamarins (Saguinus spp.). Folia Primatologica 68: 287-295.

Heymann EW, Knogge C (1997) Field observations on the neotropical pygmy squirrel, Sciurillus pusillus (Rodentia: Sciuridae) in Peruvian Amazonia. Ecotropica 3: 67-69.

1996

Ganzhorn JU, Böhning-Gaese K, Heymann EW (1996) Fruit selection and seed dispersal by primates. Primate Report 44: 63-66.

Heymann EW (1996) Social behavior of wild moustached tamarins, Saguinus mystax, at the Estación Biológica Quebrada Blanco, Peruvian Amazonia. American Journal of Primatology 38: 101-113.

Heymann EW (1996) Monkeys and apes (primates). In: Roth HH, Merz G (eds) Wildlife Resources: A Global Account of Economic Use. Springer, Heidelberg: 176-185.

Heymann EW, Sicchar Valdez LA, Tapia RJ (1996) Experiences with mixed-species housing of tamarins, Saguinus fuscicollis and Saguinus mystax (Primates: Callitrichidae), in an outdoor enclosure. Der Zoologische Garten 66: 381-390.

Kappeler PM, Heymann EW (1996) Non-convergence in the evolution of primate life history and socio-ecology. Biological Journal of the Linnean Society 59: 297-326.

Nickle DA, Heymann EW (1996) Predation on Orthoptera and other orders of insects by tamarin monkeys, Saguinus mystax and Saguinus fuscicollis (Primates: Callitrichidae), in northeastern Peru. Journal of Zoology 239: 799-819.

1995

Heymann EW (1995) Urine washing and related behaviour in wild moustached tamarins, Saguinus mystax (Callitrichidae). Primates 36: 259-264.

Heymann EW (1995) Sleeping habits of tamarins, Saguinus mystax and Saguinus fuscicollis (Mammalia: Primates: Callitrichidae), in northeastern Peru. Journal of Zoology 237: 211-226.

Knogge C, Heymann EW (1995) Field observation of twinning in the dusky titi monkey, Callicebus cupreus. Folia Primatologica 65: 118-120.

1994

Heymann EW (1994) Tiergerechte Haltung von Marmosetten und Tamarinen (Primates: Callitrichidae) aus der Sicht eines Freilandbiologen. Tierlaboratorium 17: 43-58.

Heymann EW, Aquino R (1994) Exploraciones primatológicas en las quebradas Blanco, Blanquillo y Tangarana (Río Tahuayo, Amazonía Peruana). Folia Amazónica 6: 125-138.

1993

Heymann EW (1993) The role of primates in tropical ecosystems. In: Barthlott W, Naumann CM, Schmidt-Loske K, Schuchmann KL (eds) Animal-Plant Interactions in Tropical Environments. Results of the Annual Meeting of the German Society for Tropical Ecology held at Bonn, February 13-16 (1992). Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn: 103-108.

Heymann EW (1993) Field studies on tamarins, Saguinus mystax and Saguinus fuscicollis, in northeastern Peru. Neotropical Primates 1: 10-11.

1992

Heymann EW (1992) Seed ingestion and gastrointestinal health in tamarins? Laboratory Primate Newsletter 31: 15-16.

Heymann EW (1992) Associations of tamarins (Saguinus mystax and Saguinus fuscicollis) and double-toothed kites (Harpagus bidentatus) in Peruvian Amazonia. Folia Primatologica 59: 51-55.

Sicchar LA, Heymann EW (1992) Preliminary observations on external signs of estrus in moustached tamarins, Saguinus mystax (Callitrichidae). Laboratory Primate Newsletter 31: 4-6.

1991

Heymann EW (1991) Associations between tamarins, Saguinus mystax and Saguinus fuscicollis (Primates: Callitrichidae), and double-toothed kites, Harpagus bidentatus (Falconiformes: Accipitridae). Primate Report 31: 13.

Heymann EW, Hartmann G (1991) Geophagy in moustached tamarins, Saguinus mystax (Platyrrhini: Callitrichidae), at the Río Blanco, Peruvian Amazonia. Primates 32: 533-537.

1990

Bartecki U, Heymann EW (1990) Field observations on scent marking behaviour in saddle-back tamarins, Saguinus fuscicollis (Callitrichidae, Primates).

Heymann EW (1990) Social behaviour and infant carrying in a group of moustached tamarins, Saguinus mystax (Primates: Platyrrhini: Callitrichidae), on Padre Isla, Peruvian Amazonia. Primates 31: 183-196.

Heymann EW (1990) Reactions of wild tamarins, Saguinus mystax and Saguinus fuscicollis, to avian predators. International Journal of Primatology 11: 327-337.

Heymann EW (1990) Interspecific relations in a mixed-species troop of moustached tamarins, Saguinus mystax, and saddle-back tamarins, Saguinus fuscicollis (Primates: Callitrichidae), at the Rio Blanco, Peruvian Amazonia. American Journal of Primatology 21: 115-127.

Heymann EW (1990) Further field notes on red uakaris, Cacajao calvus ucayalii, from the Quebrada Blanco, Amazonian Peru. Primate Conservation 11: 7-9.

Heymann EW (1990) Ein Besuch in der biologischen Feldstation Cahuana im Peruanischen Nationalreservat Pacaya-Samiria. Zeitschrift des Kölner Zoo 33: 95-103.

Heymann EW, Bartecki U (1990) A young saki monkey, Pithecia hirsuta, feeding on ants, Cephalotes atratus. Folia Primatologica 55: 181-184.

Heymann EW, Sicchar LA (1990) Estudio etológico del pichico barba blanca, Saguinus mystax mystax y del pichico común, Saguinus fuscicollis nigrifrons (Primates, Callitrichidae) en un galpón al aire libre - resultados preliminares. In: Dirección General Forestal y de Fauna, Instituto Veterinario de Investigaciones Tropicales y de Altura und Organización Panamericana de la Salud/Organización Mundial de la Salud (eds) La Primatología en el Perú. Investigaciones Primatológicas (1973-1985). Imprenta Propaceb, Lima: 359-381.