GASHAKA PRIMATE PROJECT: PUBLICATIONS
(n = 181; reference date: 01Apr12. Listed chronological within the following categories: 2 books, 43 research articles in journals and edited volumes, 18 unpublished reports, 7 PhD theses (completed), 8 PhD theses (expecting completion), 27 masters dissertations and Diplomarbeiten, 4 undergraduate dissertations, 36 abstracts, 12 popular writings, 4 documentaries)
Books
Sommer, Volker (2008). Schimpansenland. Wildes Leben in Afrika. Munich: C. H. Beck. 251 pp, 8 plates. ["Chimpanzeeland. Wild life in Africa"]
Sommer, Volker & Caroline Ross (eds.) (2010). Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. (Developments in Primatology: Progress and Prospects 35) Springer: New York. 531 pp
Research Articles in Journals & Edited Volumes
Sommer, Volker; Jeremiah Adanu, Isabelle Faucher & Andrew Fowler (2004). The Nigerian chimpanzee (Pan troglodytes vellerosus) at Gashaka: Two years of habituation efforts. Folia Primatologica 75: 295–316
Arnold, Kate & Klaus Zuberbühler (2006) The alarm calling system of adult male putty-nosed monkeys, Cercopithecus nictitans martini. Animal Behaviour 72: 643–653
Arnold, Kate & Klaus Zuberbühler (2006). Alarm calls and organised imperatives in male putty-nosed monkeys. Pp. 389–390 in: A. Cangelosi, A. D. M. Smith & K. Smith (eds.), The Evolution of Language (Proc. 6th International Conference [Evolang]. World Scientific Publishing Company: Singapore
Arnold, Kate & Klaus Zuberbühler (2006). Semantic combinations in primate calls. Nature 441: 303
Hohmann, Gottfried; Andrew Fowler, Volker Sommer & Sylvia Ortmann (2006). Frugivory and gregariousness of Salonga bonobos and Gashaka chimpanzees: the abundance and nutritional quality of fruit. Pp. 123–159 in: Gottfried Hohmann, Martha M. Robbins & Christophe Boesch (eds.), Feeding Ecology in Apes and Other Primates. Cambridge: Cambridge University Press
Weyher, Anna H.; Caroline Ross & Stuart Semple (2006). A comparison of gastrointestinal parasites in a crop raiding and a wild foraging troop of olive baboons (Papio cynocephalus anubis) in Nigeria. International Journal of Primatology 27: 1519–1534
Schöning, Caspar & Mark Moffett (2007). Driver ants invading a termite nest – why do the most catholic predators of all seldom take this abundant prey? Biotropica 39: 663–667
Schöning, Caspar; Darren Ellis, Andrew Fowler & Volker Sommer (2007). Army ant prey availability and consumption by chimpanzees at Gashaka (Nigeria). Journal of Zoology 271: 125–133
Warren Ymke; Bobbo Buba & Caroline Ross (2007). Patterns of crop-raiding by wild and domestic animals near Gashaka Gumti National Park Nigeria. International Journal of Pest Management 53: 207–216
Fowler, Andrew; Yianna Koutsioni & Volker Sommer (2007). Leaf-swallowing in Nigerian chimpanzees: Assumed evidence for self-medication. Primates 48: 73–76
Fowler, Andrew & Volker Sommer (2007). Subsistence technology in Nigerian chimpanzees. International Journal of Primatology 28: 997–1023
Higham, James P.; Caroline Ross, Ymke Warren, Michael Heistermann & Ann M. MacLarnon (2007). Reduced reproductive function in wild olive baboons (Papio hamadryas anubis) related to natural consumption of the African black plum (Vitex doniana). Hormones and Behavior 52: 384–390
Higham, James P.; Michael Heistermann, Caroline Ross, Stuart Semple & Ann MacLarnon (2008). The timing of ovulation with respect to sexual swelling detumescence in wild olive baboons. Primates 49: 295–299
Higham, James P.; Stuart Semple, Ann MacLarnon, Michael Heistermann & Caroline Ross (2008). Female reproductive signaling, and male mating behavior, in the olive baboon. Hormones and Behavior 55: 60–67
Higham, James P. & David M. Bennett (2008). Perspectives on wildlife, and wildlife consumption, in Eastern Nigeria. Gorilla Journal 36: 11–13
Wilkinson, Roger (2008). Some recent records of birds from Gashaka Gumti National Park and Ngel Nyaki, Nigeria, and the Gotel Mountains, Cameroon. Malimbus 30: 156–164
Arnold, Kate & Klaus Zuberbühler (2008). Meaningful call combinations in a non-human primate. Current Biology 18: R202–203
Warren, Ymke (2008) Crop–raiding baboons and defensive farmers: a West African perspective. West African Journal of Applied Ecology 14: 1–11
Higham, James P.; Ymke Warren, Jeremiah Adanu, Buba N. Umaru, Ann M. MacLarnon, Volker Sommer & Caroline Ross (2009). Life on the edge: Life-history of olive baboons at Gashaka-Gumti National Park, Nigeria. American Journal of Primatology 71: 293–304
Higham, James P.; Ann MacLarnon, Michael Heistermann, Caroline Ross, & Stuart Semple (2009). Self-directed behaviour and faecal glucocorticoids are not correlated in wild female baboons (Papio hamadryas anubis). Stress 12: 526–632
Sommer, Volker (2010). The anthropologist as a primatologist. Mental journeys of a fieldworker. Pp. 32–48 in: Jeremy MacClancy & Agustín Fuentes (eds.), Centralizing Fieldwork. Critical perspectives from primatology and biological anthropology in the lens of social anthropological theory and practice. Oxford: Berghahn
Kateřina Pomajbíková, Klára J. Petrželková, Ilona Profousová, Jana Petrášová, Svetlana Kišidayová, Zora Varádyová, & David Modrý (2010). A survey of entodiniomorphid ciliates in chimpanzees and bonobos. American Journal of Physical Anthropology 142: 42–48
Sommer, Volker & Caroline Ross (2011). Exploring and protecting West Africa's primates. The Gashaka Primate Project in context. Pp. 1–37 (Ch. 01): in Volker Sommer & Caroline Ross (eds.), Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. Springer: New York
Barnwell, Richard (2011). To save a wilderness: The creation and development of Gashaka Gumti National Park, Nigeria. Pp. 39–54 (Ch. 2) in Volker Sommer & Caroline Ross (eds.), Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. Springer: New York
Adanu, Jeremiah; Volker Sommer & Andrew Fowler (2011). Hunters, fire, cattle. Conservation challenges in eastern Nigeria, with special reference to chimpanzees. Pp. 55–100 (Ch. 03): in Volker Sommer & Caroline Ross (eds.), Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. Springer: New York
Nyanganji, Gilbert; Andrew Fowler, Aylin McNamara & Volker Sommer (2011). Monkeys and apes as animals and humans. Ethno-primatology in Nigeria's Taraba region. Pp. 101–134 (Ch. 04) in Volker Sommer & Caroline Ross (eds.), Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. Springer: New York
Koutsioni, Yianna & Volker Sommer (2011). The bush as pharmacy and supermarket. Plant use by human and non-human primates at Gashaka. Pp. 135–230 (Ch. 05) in Volker Sommer & Caroline Ross (eds.), Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. Springer: New York
Bennett, David & Caroline Ross (2011). Fulani of the highlands: Costs and benefits of living in national park enclaves. Pp. 231–266 (Ch. 6) in Volker Sommer & Caroline Ross (eds.), Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. Springer: New York
Zinner, Dietmar; Umaru Buba, Stephen Nash & Christian Roos (2011). Pan-African voyagers: The phylogeography of baboons. Pp. 267–306 (Ch. 7) in Volker Sommer & Caroline Ross (eds.), Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. Springer: New York
Warren, Ymke; James P. Higham, Ann M. Maclarnon & Caroline Ross (2011). Crop-raiding and commensalism in olive baboons: The costs and benefits of living with humans. Pp. 307–332 (Ch. 8) in Volker Sommer & Caroline Ross (eds.), Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. Springer: New York
Ross, Caroline; Ymke Warren, Ann M. Maclarnon & James P. Higham (2011). How different are Gashaka’s baboons? Forest and open country populations compared. Pp. 333–361 (Ch. 9) in Volker Sommer & Caroline Ross (eds.), Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. Springer: New York
Ey, Elodie & Julia Fischer (2011). Keeping in contact: Flexibility in calls of olive baboons. Pp. 361–384 (Ch. 10) in Volker Sommer & Caroline Ross (eds.), Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. Springer: New York
Arnold, Kate; Yvonne Pohlner & Klaus Zuberbühler (2011). Not words but meanings? Alarm calling behaviour in a forest guenon. Pp. 385–416 (Ch. 11) in Volker Sommer & Caroline Ross (eds.), Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. Springer: New York
Sommer, Volker; Jan Bauer, Andrew Fowler & Sylvia Ortmann (2011). Patriarchal chimpanzees, matriarchal bonobos. Potential ecological causes of a Pan dichotomy. Pp. 417–450 (Ch. 12) in Volker Sommer & Caroline Ross (eds.), Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. Springer: New York
Fowler, Andrew; Alejandra Pascual-Garrido, Umaru Buba, Sandra Tranquilli, Callistus Akosim; Caspar Schöning & Volker Sommer (2011). Panthropology of the fourth chimpanzee. A contribution to cultural primatology. Pp. 451–492 (Ch. 13) in Volker Sommer & Caroline Ross (eds.), Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. Springer: New York
Hughes, Nicola; Norm Rosen, Neil Gretsky & Volker Sommer (2011). Will the Nigeria-Cameroon chimpanzee go extinct? Models derived from intake rates of ape sanctuaries. Pp. 493–523 (Ch. 14) in Volker Sommer & Caroline Ross (eds.), Primates of Gashaka. Socioecology and Conservation in Nigeria's Biodiversity Hotspot. Springer: New York
Morgan, Bethan; Alade Adeleke, Tony Bassey, Richard Bergl, Andrew Dunn, Elizabeth Gadsby, Katy Gonder, Elizabeth Greengrass, Denis Koutou Koulagna, Grace Mbah, Aaron Nicholas, John Oates, Fidelis Omeni, Yohanna Saidu, Volker Sommer, Jacqueline Sunderland-Groves, Joseph Tiebou & Liz Williamson (2011). Regional Action Plan for the Conservation of the Nigeria-Cameroon Chimpanzee. IUCN/SSC Primate Specialist Group, Gland, Switzerland and Zoological Society of San Diego / CA, USA. 48 pp. [French: Morgan et al. (2011). Plan d’action por la conservation du chimpanzé du Nigeria-Cameroun (Pan troglodytes ellioti). IUCN/SSC Primate Specialist Group, Gland, Switzerland and Zoological Society of San Diego / CA, USA. 48 pp.]
Reeder, Natalie M.M.; Tina L. Gheng, Vance T. Vredenburg & David C. Blackburn (2011) Survey of the chytrid fungus Batrachochytrium dendrobatidis from montane and lowland frogs in eastern Nigeria. Herpetology Notes 4: 83–86
Lehman, Julia & Caroline Ross (2011). Baboon (Papio anubis) social complexity – a network approach. American Journal of Primatology 73:1–15
Ellis, Jacklyn; Ann MacLarnon, Michael Heistermann & Stuart Semple (2011). The social correlates of self-directed behaviour and faecal glucocorticoid levels among adult male olive baboons in Gashaka–Gumti National Park, Nigeria. African Zoology 46: 302–308
Gumnior, Maren & V. Sommer (2012). Multi-scale, multi-temporal vegetation mapping and assessment of ecosystem degradation at Gashaka Gumti National Park (Nigeria). Research Journal of Environmental and Earth Sciences
Pascual-Garrido, Alejandra; Umaru Buba, George Nodza & Volker Sommer (2012). Choosing raw material: Plants as tool sources for Nigerian chimpanzees. Folia Primatologica
Peter Vallo, Klára J. Petrželková, Ilona Profousová, Jana Petrášová, Kateřina Pomajbíková, Fabian Leendertz, Chie Hashimoto, Nicol Simmons, Fred Babweteera, Zarin Machanda, Alexander Piel, Martha Robbins, Christophe Boesch, Crickette Sanz, David Morgan, V. Sommer, Takeshi Furuichi, Shiho Fujita, Tetsuro Matsuzawa, Michael A. Huffman & David Modrý (2012). Molecular diversity of entodiniomorphid ciliate Troglodytella abrassarti and its coevolution with chimpanzees. American Journal of Physical Anthropology
Unpublished Reports to Sponsors and Supporters
Sommer, Volker (ed.) (2000). Gashaka Primate Project: First Annual Report. London: University College London [subsequent reports in 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, etc.]
Sommer, Volker (2001). Socio-ecology of Primates at Gashaka (Nigeria): Initiating Long-term Research. Leakey Foundation USA
Andrew Fowler, Jeremiah Adanu & Volker Sommer (2002). The Forest at Ngel Nyaki / Taraba (Nigeria): A Brief Survey of Tree Dimensions and Mammal Populations. Report to Leventis Ltd. & Pro-Natura International
Fowler, Andrew; Gilbert Nyanganji, Aylin McNamara, Jeremiah Adanu & Volker Sommer (2006). Conservation Status of Primates in Eastern Nigeria's Taraba State With Special Reference to Chimpanzees (Pan troglodytes vellerosus). Report to WWF-UK
Sommer, Volker & Caspar Schöning (2006). Ant-dipping and Food Abundance in Nigerian Chimpanzees. Report to Leakey Foundation, USA.
Gumnior, Maren (2008). Satellite-based Habitat Mapping of Gashaka Gumti National Park (GGNP), Nigeria. Report to North of England Zoological Society
Gumnior, Maren & Volker Sommer (2010). Satellite-based Vegetation Mapping of Gashaka Gumti National Park (GGNP), Nigeria. U. S. Fish and Wildlife Service Assistance Award 96200-9-G063 (Great Ape Conservation Fund)
PhD Theses (completed)
Warren, Ymke (2003). Olive Baboons (Papio cynocephalus anubis): Behaviour, Ecology and Human Conflict in Gashaka Gumti National Park, Nigeria. PhD Thesis, School of Human and Life Sciences, Roehampton University, London, UK
Fowler, Andrew (2006). Socio-ecology of Nigerian Chimpanzees at Gashaka. PhD Thesis, Department of Anthropology, University College London, UK
Higham, James (2006) The Reproductive Ecology of Female Olive Baboons (Papio hamadryas anubis) at Gashaka-Gumti National Park, Nigeria. PhD thesis, School of Human and Life Sciences, Roehampton University, London, UK
Ey, Elody (2008). Influences of Ecological Factors on Vocal Communication in Wild Olive Baboons. PhD thesis, Mathematisch-Naturwissenschaftliche Fakultäten, Georg-August Universität Göttingen, Germany
Bennett, David (2009). Human-Wildlife Conflict: A Case Study of the Fulani at Gashaka Gumti National Park, Nigeria. PhD thesis, School of Human and Life Sciences, Roehampton University, London, UK
Pascual Garrido, Alejandra (2011). Insectivory of Nigerian Chimpanzees: Habitat Ecology and Harvesting Strategies. PhD thesis, Facultad de Psicología, Universidad Complutense de Madrid, España
Weaver, Daniel (2011). Temporal and Spatial Patterns of Dipteran and Collembolan Abundance in a Nigerian Tropical Forest Canopy. PhD thesis, Department of Life Sciences, Roehampton University, London, UK
PhD Theses (expecting completion; working titles)
Adanu, Jeremiah (2003–2005 +). Socio-ecology of Baboons at Kwano in Gashaka Gumti National Park. Wildlife Conservation & Management, Federal University of Technology Yola, Nigeria
Inglis, David (since 2006). Vocal and Gestural Communication in Olive Baboons. School of Human and Life Sciences, Roehampton University, London, UK
Buba, Umaru (since 2007). Habitat Ecology of Nigerian Chimpanzees. Wildlife Conservation & Management, Federal University of Technology Yola, Nigeria
Alberts, Nienke (since 2008). Fusion-fission Dynamics of Baboon Groups. School of Human and Life Sciences, Roehampton University, London, UK
Lodge, Emily (since 2008). Feeding Ecology of Olive Baboons. School of Human and Life Sciences, Roehampton University, London, UK
Jesus, Gonçalo (since 2008). Resource Distribution and Primate Gregariousness in Nigeria's Gashaka Gumti National Park. Department of Anthropology, University College London, UK
Harvey, Suzanne (since 2009). Infant Socialisation in Wild Olive Baboons in Nigeria. Department of Anthropology, University College London & Department of Psychology, University of St. Andrews, UK
Auckland, Kate (since 2010). Population Genetics of Nigerian Chimpanzees. Department of Anthropology, University of Cambridge, UK
Masters Dissertations and Diplomarbeiten
Adanu, Jeremiah (2003). Socio-ecology of Forest Monkeys at Kwano in Gashaka Gumti National Park. MTech dissertation, Wildlife Conservation & Management, Federal University of Technology Yola, Nigeria
Hughes, Nicola (2003). Great Ape Sanctuaries in Nigeria and Cameroon: a Window into the Bushmeat-Trade. Dissertation, MSc in Human Evolution and Behaviour, Department of Anthropology, University College London, UK
Koutsioni, Yianna (2003). Merging Ethnobotany and Zoopharmacognosy: A Case Study of Humans and Non-Human Primates at Gashaka / Nigeria. Dissertation, MSc in Human Evolution and Behaviour, Department of Anthropology, University College London, UK
Weyher, Anne (2004). A Comparison of Gastrointestinal Parasites in a Crop-Raiding and a Forest-Dwelling Troop of Olive Baboons (Papio cynocephalus anubis) in Gashaka Gumti National Park, Nigeria. Dissertation, MRes in Primatology, Roehampton University, London, UK
Ellis, Darren (2005). Seasonal Variation in Availability and Consumption of Army Ants by Nigerian Chimpanzees. Dissertation, MSc in Human Evolution and Behaviour, Department of Anthropology, University College London, UK
Pohlner, Yvonne (2005). Ruf-Muster arborealer Affen in Gashaka, Nigeria. Diplomarbeit, Institut für Zoologie, Universität Freiburg, Germany
Walravens, Fionnuala B. C. (2005). Fission-fusion sociality in olive baboons (Papio cynocephalus anubis) at Gashaka Gumti National Park, Nigeria. Dissertation, MRes in Primatology, Roehampton University, London, UK
Bauer, Jan (2006). Vergleichende Faecesuntersuchungen bei Pan paniscus, Pan troglodytes vellerosus und Pan troglodytes verus. Diplomarbeit, Humboldt-Universität Berlin, Germany
Buba, Umaru (2007). An Investigation of the Behaviour of Pregnant and Lactating Baboons (Papio anubis) at Gashaka Gumti National Park, Nigeria. MTech dissertation in Wildlife Conservation & Management, Federal University of Technology Yola, Nigeria
Couto, Sarah (2006). Activity and Association Pattern of Wild Olive Baboons at Gashaka / Nigeria: Spatio-Temporal Variation in Relation to Resource Availability. Dissertation, MSc in Human Evolution and Behaviour, Department of Anthropology, University College London, UK
Ihuba, Jerome (2007). Frugivore Communities Within Ngel Nyaki Forest Reserve and the Influence of Forest Fragmentation on These Communities. MTech dissertation in Wildlife Conservation & Management, Federal University of Technology Yola, Nigeria
Price, Tabitha K. (2007). Information Content of Male Putty-Nosed Monkey (Cercopithecus nictitans) Vocalisations. Dissertation, MRes in Primatology, Roehampton University, London, UK
Goffe, Adeelia S. (2007). Examining Social Relationships and Stress Levels of Wild Yearling and Juvenile Baboons (Papio hamadryas anubis) in Gashaka Gumti National Park. Dissertation, MRes in Primatology, Roehampton University, London, UK
Ellis, Jacklyn J. (2008). The Social and Behavioural Correlates of Stress in Wild Male Olive Baboons (Papio hamadryas anubis) in Gashaka-Gumti National Park, Nigeria. Dissertation, MRes in Primatology, Roehampton University, London, UK
Buhl, Jacqueline S. (2008). Influence on Play Behaviour in Infant and Juvenile Olive Baboons (Papio hamadryas anubis) in Gashaka-Gumti National Park. Dissertation, MRes in Primatology, Roehampton University, London, UK
Gordon, Gemma (2009). Male Consortship in Wild Olive Baboons (Papio anubis): A Study at Gashaka-Gumti National Park, Nigeria. Dissertation, MSc in Human Evolution and Behaviour, Department of Anthropology, University College London, UK
Hodgson, Robert (2010). Handedness in Wild Olive Baboons at Gashaka, Nigeria. Dissertation, MSc in Human Evolution and Behaviour, Department of Anthropology, University College London, UK
Roberts, Thomas (2010). Infant Socialisation in Wild Olive Baboons at Gashaka, Nigeria. Dissertation, MSc in Human Evolution and Behaviour, Department of Anthropology, University College London, UK
Creaser, Emily (2011). Developmental Instability: Environmental Stress and Fluctuating Assymetry in the Baboons of Gashaka-Gumti National Park, Nigeria. Dissertation, MSc in Human Evolution and Behaviour, Department of Anthropology, University College London, UK
Bailey, Emma (2011). A Comparison of the Gastrointestinal Parasites Recovered From Olive Baboons (Papio Anubis) and Tantalus Monkeys (Cercopithecus aethiops tantalus) in Three Habitats in Gashaka Gumti National Park, Nigeria. Dissertation, MRes in Primatology, Roehampton University, London, UK
Boulton, Rebecca (2011). Facial Symmetry, Gastrointestinal Parasite Burden And Reproductive Success In Olive Baboons (Papio anubis) in in Gashaka Gumti National Park, Nigeria. Dissertation, MRes in Primatology, Roehampton University, London, UK
Flint, Sarah (2011). Seed Dispersal: The Ecological Interactions Between Olive Baboons, Plants and Secondary Dispersal Vectors in the Savanna-Tropical Rainforest Mosaic of Gashaka-Gumti National Park, Nigeria. Dissertation, MRes in Primatology, Roehampton University, London, UK
Thompson, Nicole A. (2011). Social Integration, Life-History and Stress in Juvenile Olive Baboons. Dissertation, MRes in Primatology, Roehampton University, London, UK
Kamaya, Pepeh (2011). Seed Dispersal in Baboons in Gashaka Gumti National Park, Nigeria. MTech dissertation in Wildlife Conservation & Management, Federal University of Technology Yola, Nigeria
Karngong, George (2012). Acitivity Budgets in Wild Mona Monkeys. MTech dissertation in Wildlife Biology, Akure University, Nigeria
Undergraduate Dissertations
Rawle, Elaine (2002). Crop Raiding and Its Implicate For Conservation in and Around Gashaka-Gumti National Park. Bachelor dissertation, Department of Anthropology, Oxford Brookes University, UK
Buba, Umaru (2004). Nest-building Behaviour in Chimpanzees at Gashaka-Gumti National Park. Bachelor dissertation, Department of Forestry & Wildlife Management, Federal University of Technology Yola, Nigeria
Allon, Oliver (2009). Army Ant Colony Residency Pattern and Chimpanzee Insectivory: The Ecology of a Prey-Predator Interaction. Bachelor dissertation, Human Sciences / Department of Anthropology, University College London, UK
Nodza, George (2009). Phenology Transects in a Long-term Primate Research Site. Bachelor dissertation, Federal University of Technology Bauchi, Nigeria
Abstracts (Conference Talks or Posters)
Ross, Caroline; Catherine M. Hill & Ymke Warren (2004). Friends or foes? Farmers' attitudes towards primate crop raiders. (Abstracts, UFAW International Symposium "Science in the Service of Animal Welfare", 02–04 Apr 03, Edinburgh) Animal Welfare 13: 254
Sommer, Volker; Andrew Fowler & Jeremiah Adanu (2004). The Nigerian chimpanzee (Pan troglodytes vellerosus) at Gashaka: Two years of habituation efforts. (Abstracts, 8. Kongress, Gesellschaft für Primatologie, 02–05 Oct 03, Leipzig) Folia Primatologica 75.
Ross, Caroline & Ymke Warren (2004). West African baboons: the influence of forest living and food-enhancement on activity budgets. (Abstracts, 8. Kongress, Gesellschaft für Primatologie, 02–05 Oct 03, Leipzig) Folia Primatologica 75: 328
Warren, Ymke & Caroline Ross (2004). Baboon crop raiding: pre-adaptation and success. (Abstracts, 8th Congress, Gesellschaft für Primatologie, 02–05 Oct 03, Leipzig) Folia Primatologica 75: 425
Arnold, Kate & Klaus Zuberbühler (2005) The alarm call system of free-ranging putty-nosed monkeys. (Abstract, Budapest, XXIX Int. Ethological Conference, Budapest) Advances in Ethology (Supplements to Ethology): 274
Fowler, Andrew & Volker Sommer (2005). Material culture in Nigerian chimpanzees: a contribution to cultural primatology. (Abstracts, 1. Kongress, Europäische Vereinigung für Primatologie, 09–12 Aug 05, Göttingen) Primate Report 72: 34f
Higham, James, Caroline Ross, Ymke Warren, Ann MacLarnon, Volker Sommer & Jeremiah Adanu (2005). 4 years of rainforest baboons at Gashaka. (1. Kongress, Europäische Vereinigung für Primatologie, 09–12 Aug 05, Göttingen) Primate Report 72: 46f.
Higham, James; Caroline Ross, Ymke Warren, Ann MacLarnon, Volker Sommer & Jeremiah Adanu (2005). Four years of rainforest baboons at Gashaka. (Abstract, Primate Society of Great Britain Winter Meeting, 09 Dec 05, London) Primate Eye 87: 29-30
Hill, Catherine M. & Caroline Ross (2006). Symposium: conflict and conservation: can non-human primates and farmers live together? (Abstracts, 21st Congress, International Primatological Society, Jul 06, Entebbe, Uganda) International Journal of Primatology 27: 394
Ross, Caroline & Catherine M. Hill (2006). Non-human primates as pests: variation in primate species and human cultures. (Abstracts, 21st Congress, International Primatological Society, Jul 06, Entebbe, Uganda) International Journal of Primatology 27: 398
Ross, Caroline & Ymke Warren (2006). Primate and other mammalian maize pests in Gashaka, Nigeria. (Abstracts, 21st Congress, International Primatological Society, Jul06, Entebbe, Uganda) International Journal of Primatology 27: 403.
Bennett, David M. & Caroline Ross (2006). Crop-Raiding on the Fulani of Gashaka Gumti National Park: The impact of animal-human conflict on the political ecology of a settled pastoral community. (Abstracts, 21st Congress, International Primatological Society, Jul 06, Entebbe, Uganda) International Journal of Primatology 27: 404
Higham, James P. (2007). The reproductive ecology of female olive baboons (Papio hamadryas anubis) at Gashaka-Gumti National Park, Nigeria. (PhD Abstracts) Primate Eye 91: 35f
Higham, James P.; Stuart Semple, Ann MacLarnon, Michael Heistermann & Caroline Ross. (2007). Baboon sexual swellings in a multiple-signal framework. (Abstracts, Primate Society of Great Britain Spring Meeting, 17–18 Apr 07, Durham) Primate Eye 92: 7–8
Higham, James P.; Michael Heistermann, Caroline Ross, Stuart Semple & Ann MacLarnon (2007). The relationship between ovulation and maximal swelling in wild baboons. (Abstracts, Primate Society of Great Britain Spring Meeting, 17–18Apr07, Durham) Primate Eye 92: 15
Higham, James P.; Caroline Ross, Ymke Warren, Michael Heistermann & Ann MacLarnon (2008). Reduced reproductive function in wild baboons (Papio hamadryas anubis) related to natural consumption of plant compounds. (Abstracts, European Federation of Primatology, 03–07 Sep 2007, Prague) Folia Primatologica 79: 338- 339
MacLarnon, Ann M.; Stuart Semple, Kathryn Shutt, Michael Heistermann & James P. Higham (2008). Sociality and stress in macaques and baboons. (Abstracts, European Federation of Primatology, 03–07 Sep 2007, Prague) Folia Primatologica 79: 355-355
Ey, Elodie; Kurt Hammerschmidt, Dietmar Zinner, Julia Fischer (2007). Influences of environmental factors on vocal communication in baboons. (Abstracts, European Federation of Primatology, 03–07 Sep 2007, Prague) Folia Primatologica 79: 327
Buba, Umaru N.; James P. Higham, Ann M. MacLarnon, Ymke Warren & Caroline Ross (2008). The natural history and behaviour of olive baboons at Gashaka, Nigeria. (Poster abstracts No. 139, XXII Congress, The International Primatological Society, 03–08 Aug 2008, Edinburgh, UK)
Inglis, David MacGregor; Caroline Ross & Stuart Semple (2008). Multi-modal communication in olive baboons (Papio hamadryas anubis). (Poster abstracts No. 168, XXII Congress, The International Primatological Society, 03–08 Aug 2008, Edinburgh, UK)
Price, Tabitha K.; Kate Arnold, Klaus Zuberbühler & Stuart Semple (2008). Vocal responses of male putty-nosed monkeys reflect a response-urgency rather than a referential calling system. (Abstracts No. 341, XXII Congress, The International Primatological Society, 03–08 Aug 2008, Edinburgh, UK)
Fowler, Andrew; Umaru Buba & Volker Sommer (2008). Nest-building ecology of Pan troglodytes vellerosus at Gashaka, Nigeria. (Abstracts No. 533, XXII Congress, The International Primatological Society, 03–08 Aug 2008, Edinburgh, UK)
Arnold, Kate & Klaus Zuberbühler (2008). A meaningful call combination in a forest guenon. (Abstracts No. 680, XXII Congress, The International Primatological Society, 03–08 Aug 2008, Edinburgh, UK)
Ey, Elody; Charlotte Rahn, Kurt Hammerschmidt, Dietmar Zinner, Julia Fischer (2008). Do olive baboons modify their vocalizations according to their environment? (Abstracts No. 817, XXII Congress, The International Primatological Society, 03–08 Aug 2008, Edinburgh, UK)
Higham James P.; Caroline Ross, Michael Heistermann & Ann M. MacLarnon (2008). Diet and reproductive function in wild olive baboons (Papio hamadryas anubis) at Gashaka-Gumti national park, Nigeria. (Abstracts No. 844, XXII Congress, The International Primatological Society, 03–08 Aug 2008, Edinburgh, UK)
Hughes, Nicola; Norm Rosen, Neil Gretsky & Volker Sommer (2009). Extinction risk of Pan troglodytes vellerosus. Predictions based on intake rates of chimpanzee sanctuaries. (Abstracts, 11. Meeting, Gesellschaft für Primatologie, 24–26 Feb 2009, Hannover), p. 31
Bauer, Jan; Sylvia Ortmann, Heidrun Barleben, Gottfried Hohmann, Volker Sommer, Andrew Fowler, Heribert Hofer, Andreas Elephandt (2009). Comparative structural analysis of faeces from Pan paniscus and Pan troglodytes (Abstracts, 11. Meeting, Gesellschaft für Primatologie, 24–26 Feb 2009, Hannover), p. 61
Higham, James P.; George Nodza, Umaru Buba, Michael Heistermann, Caroline Ross & Ann MacLarnon (2009). Investigating consumption of dietary hormone mimics by baboons (Papio hamadryas anubis) at Gashaka. American Journal of Primatology 71 (S1): 101
Higham, James P., Caroline Ross, Ann MacLarnon, Michael Heistermann & Stuart Semple (2009). Sexual swellings and mate choice in olive baboons. (Abstracts, AJPA)American Journal of Physical Anthropology Suppl. 48: 150
Pascual-Garrido, Alejandra; Oliver Allon, Caspar Schöning & Volker Sommer (2009). Army ant consumption by Nigerian chimpanzees: Constraints of prey ecology and ape harvesting strategies. (Abstracts, 2nd Iberian Primatological Conference, 01–03 Oct 2009, Madrid) Folia Primatologica 80: 402
Lehman, Julia & Caroline Ross (2010). Baboon social complexity – a network approach. (Abstracts, XXIII Congress, The International Primatological Society, Sep 2010, Kyoto, Japan)
MacLarnon, Ann M.; Volker Sommer, Jacklyn J. Ellis, Adeelia S. Goffe, James P. Higham, Patrick J. Tkaczynski & Caroline Ross (2010). Energetics and stress: climatic variation and glucocorticoid levels in forest-living West African baboons (Abstracts, XXIII Congress, The International Primatological Society, Sep 2010, Kyoto, Japan)
Ross, Caroline; James P. Higham, David M. Inglis, Ann M. Maclarnon, Ymke Warren & Julia Lehmann (2010). Sociality and reproductive success of olive baboons in Gashaka Gumti National park, Nigeria. (Abstracts, XXIII Congress, The International Primatological Society, Sep 2010, Kyoto, Japan)
Pascual-Garrido, Alejandra; Oliver Allon & Volker Sommer (2011). Ants and apes: army ant harvesting strategies of Nigerian chimpanzees. (Abstracts, Primate Society of Great Britain, Winter meeting "Gombe 50", London, 08–09 Dec 2010) Primate Eye 103: 16f
Sommer, Volker; Alejandra Pascual-Garrido & Oliver Allon (2011). More than nutrition? Insectivory in Nigerian chimpanzees. (Abstracts, 12th Conference, Gesellschaft für Primatologie, Utrecht, the Netherlands, 30Mar–01 Apr 2011)
Lodge, Emily; Caroline Ross & Ann MacLarnon (2012). Reproduction in forest baboons: The influence of stress and food availability. (Abstracts, Primate Society of Great Britain, Winter meeting 01 Dec 2011, Bristol). Primate Eye 106: 16f
Popular Writing
Adanu, Jeremiah (2000). Screaming chimpanzees. WWF-UK Primate Report (Summer)
Sommer, Volker (2000). Bald sind wir allein. Die Menschenaffen sterben–ein Verwandtschaftsbesuch in Nigeria. Die Welt (Literarische Welt) 09 Sep 00: 3
Fowler, Andrew (2001). Chimpanzees of Nigeria. WWF-UK Primate Report (Autumn)
Sommer, Volker (2001). The monkey with the drum. Inside Nigeria’s primate paradise. Nigeria Parks: 22-25 (Reprint, The Week, Nigeria: 15, 2002)
Sommer, Volker (2002). Primate paradise. Chester Zoo: Zoo Life 10: 18-19
Warren, Ymke (2002). More to baboons than meets the eye. WWF-UK Primate Report (Summer)
Warren, Ymke (2002). Baboons: Gashaka's most wanted. WWF-UK Primate Report
Sommer, Volker (2003). Bruder Affe. "Wir Affen. Der Mensch und seine Verwandten". Lead essay for Folio, Neue Zuercher Zeitung (August): 14–18
Garcia, Susana (2008). Memória da passagem por Gashaka. Pp. 213-222 in: Frias, S. (ed.), Etnografia & Emoções. Lisboa: Instituto Superior de Ciências Sociais e Políticas. [Portuguese]
Marina Aizen (2007). Una monada. Revista Viva, diario Clarin, 11 Nov, pp. 103-106 (story about Alejandra Pascual Garrido in Sunday-Magazine of leading national Argentinian newspaper) [Spanish]
Kamaya, Pepeh (2011). GGNP steps into GIS technology. The Chimp (GGNP newsletter)
Kawuji, Babangida (2011). Auto radios powered by solar. The Chimp (GGNP newsletter)
Documentaries
"Der Affenwald von Gashaka" (2003). German Television, ARD / Bayerischer Rundfunk; 45 min documentary produced by Felix Heidinger; first screening (with many repeats): 30 Jul 03
"Nigeria's Primate Paradise" (2003). German Television, ARD / Bayerischer Rundfunk; 25 min documentary produced by Felix Heidinger & Volker Sommer; for distribution since Aug 03
"Culture in Chimpanzees", Display within the exhibition "Evolution", Deutsches Hygienemuseum, Dresden, Germany, Sep 05–Feb 06; Florence, Italy, mid 2006
“Ich bin ein Menschenaffe / Je suis un singe”. 45-min TV documentary about Volker Sommer’s life and research. Author: Anja Krug-Metzinger. Producer: ARTE (Association Relative à la Télévision Européenne); German-French Culture Channel (first broadcast: 07 May 2011; youtube.com/watch?v=3KdwQltR6PU)