As with many other species in the primate order, ring-tailed lemurs (Lemur catta) are threatened with extinction. Our articles documented declines in wild ring-tailed lemur populations and noted that fewer than 2,500 wild ring-tailed lemurs are known to persist in 32 [Gould and Sauther: Primate Conservation 2016; 30: 89–101] and 34 [LaFleur et al.: Folia Primatologica 2017; 87: 320–330] sites. A criticism of our articles [Murphy et al.: International Journal of Primatology 2017; 38: 623–628] suggested that we have inadequately sampled ring-tailed lemur populations and habitats, and misused the literature. We disagree, and provide both a detailed rebuttal and responses to specific critique points herein. Moreover, we restate our case outlining a dramatic decline of ring-tailed lemurs resulting from anthropogenic pressures (deforestation, severe habitat fragmentation, extraction for the pet and bushmeat trades). We pose several thought-provoking questions as to when is the appropriate time for researchers to “sound the alarm” about a species’ decline, and remain committed to understanding the drivers of unsustainable exploitation of this emblematic lemur, and preventing their extinction in the wild.

Keywords:
Ring-tailed lemur, Conservation, Population decline, Madagascar, Extirpation, Extinction
1.
Andriaholinirina N, Baden A, Blanco M, Chikhi L, Cooke A, Davies N, et al Dolch R, Donati G, Ganzhorn J, Golden C, Groeneveld LF, Hapke A, Irwin M, Johnson S, Kappeler P, King T, Lewis R, Louis EE, Markolf M, Mass V, Mittermeier RA, Nichols R, Patel E, Rabarivola CJ, Raharivololona B, Rajaobelina S, Rakotoarisoa G, Rakotomanga B, Rakotonanahary J, Rakotondrainibe H, Rakotondratsimba G, Rakotondratsimba M, Rakotonirina L, Ralainasolo FB, Ralison J, Ramahaleo T, Ranaivoarisoa JF, Randrianahaleo SI, Randrianambinina B, Randrianarimanana L, Randrianasolo H, Randriatahina G, Rasamimananana H, Rasolofoharivelo T, Rasoloharijaona S, Ratelolahy F, Ratsimbazafy J, Ratsimbazafy N, Razafindraibe H, Razafindramanana J, Rowe N, Salmona J, Seiler M, Volampeno S, Wright P, Youssouf J, Zaonarivelo J, Zaramody A (2014). Lemur catta. The IUCN Red List of Threatened Species 2014: e.T11496A62260437.
2.
Brinkmann K, Noromiarilanto F, Ratovonamana RY, Buerkert A (2014). Deforestation processes in south-western Madagascar over the past 40 years: what can we learn from settlement characteristics? Agriculture, Ecosystems and Environment 195: 231–243.
3.
Caughlin TT, Ferguson JM, Lichstein JW, Zuidema PA, Bunyavejchewin S, Levey DJ (2015). Loss of animal seed dispersal increases extinction risk in a tropical tree species due to pervasive negative density dependence across life stages. Proceedings of the Royal Society B: Biological Sciences 282: 20142095.
4.
Estrada A, Garber PA, Rylands AB, Roos C, Fernandez-Duque E, Di Fiore A, Nekaris KA, Nijman V, Heymann EW, Lambert JE, Rovero F (2017). Impending extinction crisis of the world’s primates: Why primates matter. Science Advances 3: e1600946.
5.
Frankel OH (1974). Genetic conservation: our evolutionary responsibility. Genetics 78: 53–65.
6.
Ganzhorn JU, Randriamanalina MH (2004). Les lémuriens de la forêt de Mikea. In Inventaire floristique et faunistique de la Forêt de Mikea: Paysage écologique et diversité biologique d’une préoccupation majeure pour la conservation (Raselimanana AP, Goodman SM, eds.), pp 87–93. Antananarivo, Recherches pour le Développement, Série Sciences Biologiques, Centre d’Information et de Documentation Scientifique et Technique.
7.
Gardner CJ, Davies ZG (2014). Rural bushmeat consumption within multiple-use protected areas: qualitative evidence from Southwest Madagascar. Human Ecology 42: 21–34.
8.
Gardner CJ, Fanning E, Thomas H, Kidney D (2009). The lemur diversity of the Fiherenana-Manombo Complex, southwest Madagascar. Madagascar Conservation and Development 4: 38–43.
9.
Goodman S (2003). Hunting of wild animals by Sakalava of the Menabe region: a field report from Kirindy-Mite. Lemur News 8: 4–6.
10.
Goodman SM, Rakotoarisoa SV, Wilmé L (2006). The distribution and biogeography of the ringtailed lemur (Lemur catta) in Madagascar. In Ringtailed Lemur Biology (Jolly A, Sussman RW, Koyama N, Rasamimanana H, eds.), pp 3–15. New York, Springer.
11.
Gould L, Andrianomena P (2015). Ring-tailed lemurs (Lemur catta), forest fragments, and community-level conservation in south-central Madagascar. Primate Conservation 29: 67–73.
12.
Gould L, Sauther ML (2016). Going, going, gone… Is the iconic ring-tailed lemur (Lemur catta) headed for imminent extirpation. Primate Conservation 30: 89–101.
13.
IUCN (2013). Documentation standards and consistency checks for IUCN Red List assessments and species accounts. Version 2. Adopted by the IUCN Red List Committee and IUCN SSC Steering Committee. http://www.iucnredlist.org/documents/RL_Standards_Consistency.pdf.
14.
Irwin MT, Johnson SE, Wright PC (2005). The state of lemur conservation in southeastern Madagascar: population and habitat assessments for diurnal and cathemeral lemurs using surveys, satellite imagery and GIS. Oryx 39: 204–218.
15.
Irwin MT, Samonds KE, Raharison JL, Wright PC (2004). Lemur latrines: observations of latrine behavior in wild primates and possible ecological significance. Journal of Mammalogy 85: 420–427.
16.
Jolly A, Koyama N, Rasamimanana H, Crowley H, Williams G (2006). Berenty Reserve: a research site in southern Madagascar. In Ringtailed Lemur Biology (Jolly A, Sussman RW, Koyama N, Rasamimanana H, eds.), pp 32–42. New York, Springer.
17.
Kelley E, Sussman R, Muldoon K (2007). The status of lemur species at Antserananomby: an update. Primate Conservation 11: 71–77.
18.
LaFleur M, Clarke T, Giraud L, Youssouf J, Gould L, Adiba M (2015). Reniala Lemur Rescue Center for Ring-tailed Lemurs in Madagascar. Lemur News 19: 11–13.
19.
LaFleur M, Clarke T, Reuter K, Schaefer T (2017). Rapid decrease in populations of wild ring-tailed lemurs (Lemur catta) in Madagascar. Folia Primatologica 87: 320–330.
20.
Moniac N, Heitmann A (2007). Lemur catta and hunting around Andohahela. Lemur News 12: 11.
21.
Murphy AJ, Ferguson B, Gardner CJ (2017). Recent estimates of ring-tailed lemur (Lemur catta) population declines are methodologically flawed and misleading. International Journal of Primatology 38: 623–628.
22.
Murphy A (2017). 2000 Ring-tailed lemurs left in the wild? Not so fast… [Blog Post]. https://medium.com/@Asia_Murphy/2-000-ring-tailed-lemurs-left-in-the-wild-not-so-fast-622159005454.
23.
Rainforest Trust (2017). Saving the lost forest of Madagascar. https://www.rainforesttrust.org/project/saving-the-lost-forest-of-madagascar/.
24.
Reed M (2017). Ring-tailed lemurs down by 95%? Maybe not. https://news.mongabay.com/2017/06/ring-tailed-lemurs-down-by-95-percent-maybe-not/.
25.
Reuter KE, Schaefer MS (2016). Captive conditions of pet lemurs in Madagascar. Folia Primatologica 87: 48–63.
26.
Schwitzer C, Mittermeier RA, Rylands AB, Chiozza F, Williamson EA, Macfie EJ, Wallis J, Cotton A (eds.) (2017). Primates in Peril: The World’s 25 Most Endangered Primates 2016–2018. IUCN SSC Primate Specialist Group (PSG), International Primatological Society (IPS), Conservation International (CI), and Bristol Zoological Society, Arlington, VA.
27.
Schwitzer C, Mittermeier RA, Johnson SE, Ratsimbazafy J, Razafindramanana J, Louis EE, Chikhi L, Colquhoun IC, Crick J, Dolch R, Donati G, Irwin M, LaFleur M, Nash S, Patel E, Peacock H, Randrianambinina B, Rasolofoharivelo T, Wright P (2014). Averting lemur extinctions amid Madagascar’s political crisis. Science 343: 842–843.
28.
Semel BP, Ferguson B (2013). Ring-tailed lemurs (Lemur catta) using cliffs as sleeping sites. Lemur News 17: 4–6.
29.
Siers RS (2007). Research experience in Vohibasia Forest, southwestern Madagascar. Lemur News 12: 42–43.
30.
Stanford CB (2002). Avoiding predators: expectations and evidence in primate antipredator behavior. International Journal of Primatology 23: 741–757.
31.
Sussman RW (1991). Demography and social organization of free-ranging Lemur catta in the Beza Mahafaly Reserve, Madagascar. American Journal of Physical Anthropology 84: 43–58.
32.
Sussman RW, Green GM, Porton I, Andrianasolondraibe OL, Ratsirarson J (2003). A survey of the habitat of Lemur catta in southwestern and southern Madagascar. Primate Conservation 19: 1631.
33.
Sussman RW, Sweeney S, Green GM, Porton I, Andrianasolondraibe OL, Ratsirarson J (2006). A preliminary estimate of Lemur catta population density using satellite imagery. In Ringtailed Lemur Biology (Jolly A, Sussman RW, Koyama N, Rasamimanana H, eds.), pp 16–31. New York, Springer.
34.
Williamson EA, Feistner AT (2003). Habituating primates: processes, techniques, variables and ethics. In Field and Laboratory Methods in Primatology: A Practical Guide (Setchell JM, Curtis DJ, eds.), pp 25–39. Cambridge, Cambridge University Press.
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2018
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