Understanding human-flying fox interactions in the Agusan Marsh Wildlife Sanctuary as basis for conservation policy interventions

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Sherryl L. Paz
Juan Carlos T. Gonzalez


There is no documented flying fox hunting study done in the Agusan Marsh Wildlife Sanctuary (AMWS) which is known to harbor many threatened wildlife species. The Large Flying Fox Pteropus vampyrus is known to be threatened by hunting in the AMWS despite existing laws, such as the Wildlife Act. We conducted semi-structured interviews from September 2017 to January 2018 with 240 hunters in 10 villages through purposive sampling to determine the socio-demographic and economic profile of the hunters, their conservation awareness, perceptions on the monitoring scheme and enforcement, possible hunting patterns, and hunting drivers. Results showed that farming and fishing are the most common livelihoods of hunters. Most hunters achieved an education at the elementary level (42.9%), and belong to a household with 4–6 members (55.5%), often with only one member having a meager daily income (80.7%). Annual flooding was the main economic constraint to the hunters. Largely comprised of indigenous Manobos (62.9%), the majority of hunters did not believe in avoiding taboo species (85.4%). Most of the hunters were unaware of laws protecting Wildlife (62.9%) and unable to differentiate between threatened and non-threatened species (86.3%). Poor implementation of the monitoring scheme and insufficient enforcement were also observed in AMWS. Kites with hooks (55%) and guns (31.7%) were used to hunt P. vampyrus mostly for local consumption (83.3%). Multivariate analysis revealed that daily income and engagement in conservation negatively affected hunting intensity. With many constraints in totally banning hunting in poor and wildlife-dependent indigenous communities in AMWS, flexible policies must be considered. It is more reasonable and realistic to consider science-based hunting quotas in policy interventions to balance conservation and human welfare. Positive behavioral change towards sustainable hunting and trading bans requires a combination of effective education campaigns, engagement of indigenous communities in conservation, improved enforcement, and sustainable livelihood programs.

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Sherryl L. Paz and Juan Carlos T. Gonzalez 2021. Understanding human-flying fox interactions in the Agusan Marsh Wildlife Sanctuary as basis for conservation policy interventions. Journal of Threatened Taxa. 13, 11 (Sep. 2021), 19431–19447. DOI:https://doi.org/10.11609/jott.7466.13.11.19431-19447.


Albert, J.R.G., G.F. Santos & J.F.V. Vizmanos (2018). Profile and determinants of the middle-income class in the Philippines. PIDS Discussion Paper No. 2018-20. Quezon City, Philippines: Philippine Institute for Development Studies. https://pidswebs.pids.gov.ph/CDN/PUBLICATIONS/pidsdps1820.pdf (Accessed 15 April 2020)

Ardoin, N.M., A.W. Bowers, N.W. Roth & H. Holthuis (2018). Environmental education and K-12 student outcomes: a review and analysis of research. The Journal of Environmental Education 49: 1–17. https://doi.org/10.1080/00958964.2017.1366155

Apan, A., L.A. Suarez, T. Maraseni & J.A. Castillo (2017). The rate, extent and spatial predictors of forest loss (2000–2012) in the terrestrial protected areas of the Philippines. Applied Geography (81): 32–42. https://doi.org/10.1016/j.apgeog.2017.02.007

Aziz, S.A., R.C. Gopalasamy, G. Xingli, P.M. Forget & C.A. Ahimsa (2017). Coexistence and Conflict between the Island Flying fox (Pteropus hypomelanus) and Humans on Tioman Island, Peninsular Malaysia Human Ecology, 45: 377–389. https://doi.org/10.1007/s10745-017-9905-6

Aziz, S.A., K.R. McConkey, K. Tanalgo, T. Sritongchuay, M.R. Low, J.Y. Yong, T.L. Mildenstein, C.E. Nuevo-Diego, V. Lim & P.A. Racey (2021). The critical importance of Old World fruit bats for healthy ecosystems and economies. Frontiers in Ecology and Evolution 9: 181. https://www.frontiersin.org/articles/10.3389/fevo.2021.641411/full?utm_source=S-TWT&utm_medium=SNET&utm_campaign=ECO_FEVO_XXXXXXXX_auto-dlvrit

Baral, H.S., B. Sahgal, S. Mohsanin, K. Namgay & A.A. Khan (2014). Species and habitat conservation through small locally recognized and community managed special conservation sites. Journal of Threatened Taxa 6(5): 5677–5685. https://doi.org/10.11609/JoTT.o3792.5677-85

Bates, P., C. Francis, M. Gumal, S. Bumrungsri, J. Walston, L. Heaney & T. Mildenstein (2008). Pteropus vampyrus. In: IUCN 2008. The IUCN Red List of Threatened Species 2008. Downloaded on 18 October 2018. https://doi.org/10.2305/IUCN.UK.2008.RLTS.T18766A8593657.en

Bendsen, N., A. Gonzales, M.C.S. Jasma & F. Temur (2017). Negotiating with the Spirits: Recognizing the Conservation Values of Indigenous Knowledge Systems and Practices of the Agusanon Manobo, Agusan del Sur, Philippines. GIZ-COSERAM.

Brashares, J.S., C.D. Golden, K.Z. Weinbaum, C.B. Barrett & G.V. Okello (2011). Economic and geographic drivers of wildlife consumption in rural Africa. Proceedings of the National Academy of Sciences, 108: 13931–13936.

Clayton, L. & E.J. Milner-Gulland (2000). The trade in wildlife in North Sulawesi, Indonesia, pp. 473–496. In: Robinson, J.G. & E. Bennet (eds.). Hunting for Sustainability in Tropical Forests. Columbia University Press, New York.

Cooney, R, D. Roe, H. Dublin, J. Phelps, D. Wilkie, A. Keane, H. Travers, D. Skinner, D.W.S. Challender, J.R. Allan & D. Biggs (2016). From Poachers to Protectors: Engaging Local Communities in Solutions to Illegal Wildlife Trade. Conservation Letters 10(3) https://doi.org/10.1111/conl.12294.

Corlett, R.T. (1998). Frugivory and seed dispersal by vertebrates in the Oriental (Indomalayan) Region. Biological Reviews of the Cambridge Philosophical Society 73: 413–448.

DENR (2001). Agusan marsh management plan. Agusan del Sur, Department of Environment and Natural Resources, Philippines.

DENR (2011). Watershed Rehabilitation, Biodiversity Conservation, and Related Social and Indigenous Peoples Development. Agusan River Basin Integrated Water Resources Management Project PPTA TA NO. 7258-PHI Final Report Volume 3: supporting reports.

DENR (2011). Wildlife Resources Conservation and Protection Act. https://www.cbd.int/doc/measures/abs/msr-abs-ph3-en.pdf. Accessed 17 March 2015.

DENR Caraga (2015). The Agusan March Wildlife Sanctuary Management Plan (2015–2019). PAWCZMS, DENR-Caraga, 91 pp.

Duffy, R., F.S. John, B. Buscher & D. Brockington (2016). Toward a New Understanding of the Links between Poverty and Illegal Wildlife Hunting. Conservation Biology 30(1): 14–22. https://doi.org/10.1111/cobi.12622

Epstein, J.H., K.J. Olival, J.R.C. Pulliam, C. Smith, J. Westrum, T. Hughes, A.P. Dobson, A. Zubaid, S.A. Rahman, M.M. Basir, H.E. Field & P. Daszak (2009). Pteropus vampyrus, a hunted migratory species with a multinationational home-range and a need for regional management. Journal of Applied Ecology (46): 991–1002. https://doi.org/10.1111/j.1365-2664.2009.01699.x

Fa, J.E., J. Olivero, M.A. Farfán, A.L. Márquez & J.M. Vargas (2015). Correlates of bushmeat in markets and depletion of wildlife. Conservation Biology 29(3): 805–815. https://doi.org/10.1111/cobi.12441

Friant, S., S.B. Paige & T.L. Goldberg (2015). Drivers of Bushmeat Hunting and Perceptions of Zoonoses in Nigerian Hunting Communities. PLoS Neglected Tropical Diseases 9(5): e0003792. https://doi.org/10.1371/journal.pntd.0003792

Gonzalez, J.C.T., C. Layusa, L. Afuang, M. Duya, D. Tabaranza, C. Esapaňola, W. Van de Ven, A. Diesmos, R. Causaren, M. Diesmos, R. Lagat, N. Realubit, E. Sy, I. Lit, Jr., J. Naredo, E. Lastica-Ternura, S. Pasicolan, A. Tagtag, J. De Leon, T. Lim & P. Ong (2018). Review and update of the 2004 National List of Threatened Terrestrial Fauna of the Philippines. Sylvatrop, The Technical Journal of Philippine Ecosystems and Natural Resources 28(1): 73–144.

Hammer, Ø., D.A.T. Harper & P.D. Ryan (2001). Past: Paleontological Statistics Software Package for Education and Data Analysis. Palaeontologia Electronica 4(1): 4–9. http://palaeo-electronica.org/2001_1/past/issue1_01.htm

Heaney, L., D. Balete, M. Dolar & P. Ong (1998). A Synopsis of the Mammalian Fauna of the Philippine Islands. Fieldiana Zoology 88: 1–61.

Ibanez, J.C. & S.T. Bastian Jr. (2015). Are sago palm Metroxylon sagu growths in Agusan Marsh Wildlife Sanctuary a critical habitat for endemic wildlife? A Project Terminal Report. University of the Philippines Center for Integrative Development Studies and University of the Philippines in Mindanao, 33 pp.

International Union for the Conservation of Nature (2014). The IUCN Red List of threatened species. Version 2014.3. Downloaded on 14 September 2018. Retrieved from http://www.iucnredlist.org

International Union for the Conservation of Nature (2021). The IUCN Red List of Threatened Species. Version 2021-2. https://www.iucnredlist.org. Downloaded on [7 Aug 2021].

Ingle, N.R. & L.R. Heaney (1992). A key to the bats of the Philippine Islands. Fieldiana: Zoology, new series 69: 1–44.

Jachmann, H. & Billiouw, M. (1997). Elephant poaching and law enforcement in the Central Luangwa Valley, Zambia. Journal of Applied Ecology 34: 233–244.

Jacobson, S.K. (1995). Conserving Wildlife: International Education and Communication Approaches. Columbia University Press, New York.

Jenkins, R.K.B. & P.A. Racey (2008). Bats as Bushmeat in Madagascar. Madagascar Conservation and Development 3: 22–30.

Johnson, A., J. Goodrich, T. Hansel, A. Rasphone, A. Saypanya, C. Vongkhamheng, Venevongphet & S. Strinberg (2016). To protect or neglect? Design, monitoring, and evaluation of a law enforcement strategy to recover small populations of wild tigers and their prey. Biological Conservation 202: 99–109. https://doi.org/10.1016/j.biocon.2016.08.018

Kingston, T., A. Zubaid, G. Lim & F. Hatta (2006). From research to outreach: Environmental education materials for the bats of Malaysia, pp. 21–29. In: Yahya N.A., E. Philip E. & T. Ong (eds.). Proceedings of the best of both worlds conference on environmental education for sustainable development, 6–8 September 2005, Gemilang Press Sdn Bhd, Kuala Lumpur.

Kunz, T.H. & D. Jones (2000). Pteropus vampyrus. Mammalian Species 642, 1–6.Kushosha, E. (2001). Education and environmental future. Malihai Magazine 5: 9–10.

Lee, R.J., A.J. Gorog, A. Dwiyahreni, S. Siwu, J. Riley, H. Alexander, G.D. Paoli & W. Ramono (2005). Wildlife trade and implications for law enforcement in Indonesia: a case study from North Sulawesi. Biological Conservation 123: 477–488.

Mallari, N.A., N.J. Collar, P. McGowan & S.J. Marsden (2016). Philippine protected areas are not meeting the biodiversity coverage and management effectiveness requirements of Aichi Target 11. Ambio 45(3): 313–322.

McIlwee, A.P. & L. Martin (2002). On the intrinsic capacity for increase of Australian flying-foxes (Pteropus spp. Megachiroptera). Australian Zoologist 32: 76–100.

McConkey, K.R. & D.R. Drake (2006). Flying foxes cease to function as seed dispersers long before they become rare. Ecology 87: 271–276.

MEA (Millennium Ecosystem Assessment) (2005). Ecosystems and Human Well-being: Biodiversity Synthesis. World Resources Institute, Washington DC.

Mickleburgh, S., K. Waylen & P. Racey (2009). Bats as bushmeat: a global review. Oryx 43: 217–234.

Milda, D., T. Ramesh, R. Kalle, V. Gayathri & M. Thanikodi (2020). Ranger survey reveals conservation issues across Protected and outside Protected Areas in southern India. Global Ecology and Conservation 24: e01256. https://doi.org/10.1016/j.gecco.2020.e01256

Mildenstein, T.L. (2012). Conservation of endangered flying foxes in the Philippines: effects of anthropogenic disturbance and research methods for community-based conservation. Ph.D. Thesis, University of Montana, United States.

Mildenstein, T., I. Tanshi & P. Racey (2016). Exploitation of bats for bushmeat and medicine, pp. 325–375. In: Voigt C. & T. Kingston (eds.). Bats in the Anthropocene: Conservation of Bats in a Changing World. Springer Cham Heidelberg New York Dordrecht London, 605pp.

Myers, N., R.A. Mittermeier, C.G. Mittermeier, G. da Fonseca & J. Kent (2000). Biodiversity hotspots for conservation priorities. Nature 403: 853–858. https://doi.org/10.1038/35002501

Nakamoto, A., K. Kinjo & M. Izawa (2008). The role of Orii’s flying-fox (Pteropus dasymallus inopinatus) as a pollinator and a seed disperser on Okinawa-jima Island, the Ryukyu Archipelago, Japan. Ecological Research 24: 405–414.

Nasi, R., D. Brown, D. Wilkie, E. Bennett, C. Tutin, G. van Tol & T. Christophersen (2008). Conservation and use of wildlife-based resources: the bushmeat crisis. CBD Technical Series No.33. Montreal, Canada, Secretariat of the Convention on Biological Diversity and Center for International Forestry Research (CIFOR), Bogor, Indonesia, 50p.

Pailler, S. (2005). The necessity, complexity and difficulty of resolving the bushmeat crisis in west-central Africa. Journal of Development and Social Transformation 2: 99–107.

PEF (2008). Eastern Mindanao Biodiversity Corridor Conservation Framework. Philippine Eagle Foundation, Conservation International-Philippines, Department of Environment and Natural Resources, Davao City, Philippines, 95pp.

Posa, M.R.C., A.C. Diesmos, N.S. Sodhi & T.M. Brooks (2008). Hope for threatened tropical biodiversity: Lessons from the Philippines. BioScience 58: 231–240. https://doi.org/10.1641/B580309

Primavera, J.H. & M.I. Tumanda (2007). The Agusan Marsh: A situationer with focus on scientific aspects. Proceedings of the 1st Scientific Conference on the Agusan Marsh. Butuan City, Agusan Del Sur, Philippines. Philippine Council for Aquatic and Marine Research and Development.

Racey, P.A. & A.C. Entwistle (2000). Life history and reproductive strategies in bats, pp. 363–414. In: Crighton, E. & P.H. Krutzsch (eds.). Reproductive Biology of Bats. Academic Press, NY.

Raymundo, M.L. & C.F. Caballes (2016). An insight into bat hunter behavior and perception with implications for the conservation of the critically endangered Philippine bare-backed fruit bat. Journal of Ethnobiology 36(2): 382–394.

Robinson, J.G. & E.L. Bennett (2002). Will alleviating poverty solve the bushmeat crisis? Oryx 36: 332–332.

Scheffers, B.R., R.T. Corlett, A. Diesmos & W.F. Laurance (2012). Local demand drives a bushmeat industry in a Philippine forest preserve. Tropical Conservation Science 5(2): 133–141. https://doi.org/10.1177/194008291200500203

Schipper, J. , J.S. Chanson, F. Chiozza, N.A. Cox, M. Hoffmann, V. Katariya, J. Lamoreux, A.S.L Rodrigues, S.N. Stuart, H.J. Temple, J. Baillie, L. Boitani, T.E. Lacher Jr, R.A. Mittermeier, A.T. Smith, D. Absolon, J.M. Aguiar, G. Amori, N. Bakkour, R. Baldi, R.J. Berridge, J. Bielby, P.A. Black, J. Blanc, T.M. Brooks, J.A. Burton, T.M. Butynski, G. Catullo, R. Chapman, Z. Cokeliss, B. Collen, J. Conroy, J.G. Cooke, G.A.B. da Fonseca, A.E. Derocher, H.T. Dublin, J.W. Duckworth, L. Emmons, R.H. Emslie, M. Festa-Bianchet, M. Foster, S. Foster, D.L. Garshelis, C. Gates, M. Gimenez-Dixon, S. Gonzalez, J.F. Gonzalez-Maya, T.C. Good, G. Hammerson, P.S. Hammond, D. Happold, M. Happold, J. Hare, R.B. Harris, C.E. Hawkins, M. Haywood, L.R. Heaney, S. Hedges, K.M. Helgen, C. Hilton-Taylor, S.A. Hussain, N. Ishii, T.A. Jefferson, R.K.B Jenkins, C.H. Johnston, M. Keith, J. Kingdon, D.H. Knox, K.M. Kovacs, P. Langhammer, K. Leus, R. Lewison, G. Lichtenstein, L.F. Lowry, Z. Macavoy, G.M. Mace, D.P. Mallon, M. Masi, M.W. McKnight, R.A. Medellín, P. Medici, G. Mills, P.D. Moehlman, S. Molur, A. Mora, K. Nowell, J.F. Oates, W. Olech, W.R.L. Oliver, M. Oprea, B.D. Patterson, W.F. Perrin, B.A. Polidoro, C. Pollock, A. Powel, Y. Protas, P. Racey, J. Ragle, P. Ramani, G. Rathbun, R.R. Reeves, S.B. Reilly, J.E. Reynolds 3rd, C. Rondinini, R.G. Rosell-Ambal, M. Rulli, A.B. Rylands, S. Savini, C.J. Schank, W. Sechrest, C. Self-Sullivan, A. Shoemaker, C. Sillero-Zubiri, N. De Silva, D.E. Smith, C. Srinivasulu, P.J. Stephenson, N. Strien, B.K. Talukdar, B.L. Taylor, R. Timmins, D.G. Tirira, M.F. Tognelli, K. Tsytsulina, L.M. Veiga, J.C. Vié, E.A. Williamson, S.A. Wyatt, Y. Xie & B.E. Young (2008). The status of the world’s land and marine mammals: diversity, threat and knowledge. Science 322: 225–230. https://doi.org/ 10.1126/science.1165115

Sheherazade & S. Tsang (2015). Quantifying the bat bushmeat trade in North Sulawsi, Indonesia, with suggestions for conservation action. Global Ecology Conservaiton 3: 324–330. https://www.sciencedirect.com/science/article/pii/S2351989415000049?via%3Dihub

Shilton, L.A. & R.J. Whittaker (2009). The role of pteropodid bats in reestablishing tropical forests on Krakatau, pp. 176–215. In: Fleming, T.H. & P.A. Racey (eds.). Island Bats. Chicago University Press, Chicago.

Shively, G.E. (1997). Poverty, technology and wildlife hunting in Palawan. Environmental Conservation 24: 57–63.

Stier, S.C. & T.L. Mildenstein (2005). Dietary habits of the world’s largest bats: the Philippine Flying Foxes, Acerodon jubatus and Pteropus vampyrus lanensis. Journal of Mammalogy 86: 719–728. https://doi.org/10.1644/1545-1542(2005)086[0719:DHOTWL]2.0.CO;2

Swamy, V. & M. Pinedo-Vasquez (2014). Bushmeat harvest in tropical forests: Knowledge base, gaps and research priorities. Occasional paper 114. CIFOR, Bogor, Indonesia.

Tanalgo, K.C., R.D. Teves, F.R.P. Salvaña, R.E. Baleva & J.A.G. Tabora (2016). Human-bat interactions in caves of South Central Mindanao, Philippines. Wildlife Biology in Practice 12(1): 1–14.

Tanalgo, K.C. (2017). Wildlife hunting by indigenous people in a Philippine protected area: a perspective from Mt. Apo National Park, Mindanao Island. Journal of Threatened Taxa 9(6): 10307–10313. https://doi.org/10.11609/jott.2967.9.6.10307-10313

Tanalgo, K.C. & A. Hughes (2018). Bats of the Philippine Islands—A review of research directions and relevance to national-level priorities and targets. Mammalian Biology 91: 46–56.

Tanalgo, K.C. & A.C. Hughes (2019). Priority-setting for Philippine Bats using practical approach to guide effective species conservation and policy-making in the Anthropocene. Hystrix, the Italian Journal of Mammalogy 30(1): 74–83. http://www.italian-journal-of-mammalogy.it

Tomas, R.C., J.B. Manuta & V.G. dela Rosa (2011). Too Much or Too Little Water: Adaptation Pathways of Agusan Marsh Communities. SLONGAN 1(27): 27–39.

Trewhella, W.J., K.M. Rodriguez-Clark, N. Corp, A. Entwistle, S.R.T. Garrett, E. Granek, K.L. Lengel, M.J. Raboude, P.F. Reason & B.J. Sewall (2005). Environmental education as a component of multidisciplinary conservation programs: lessons from conservation initiatives for critically endangered fruit bats in the western Indian Ocean. Conservation Biology 19: 75–85.

Velho, N., U. Srinivasan, P. Singh & W.F. Laurance (2016). Large Mammal Use of protected and community-managed lands in a biodiversity hotspot. Animal Conservation 19(2): 199–208. https://doi.org/10.1111/acv.12234

World Resources Institute (2003). Earthtrends. Downloaded on 8 October 2018. Retrieved from http://earthtrends.wri.org

Wiles, G.J. & A.P. Brooke (2009). Conservation threats to bats in the Pacific Islands and insular Southeast Asia, pp 405–459. In: Fleming, T.H. & P.A. Racey (Eds.). Island Bats: Evolution, Ecology, and Conservation. Chicago University Press, Chicago, 560 pp.

Worboys, G.L. & C. Winkler (2006). Natural Heritage, pp. 3–40. In: Lockwood M., G.L. Worboys & A. Kothari (ed.). Managing Protected Areas: A Global Guide. Earthscan, London, Sterling, VA, 832 pp.