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Indri Indri) Health in Madagascar American Journal of Primatology 73:632–642 (2011) RESEARCH ARTICLE Effects of Anthropogenic Disturbance on Indri (Indri indri) Health in Madagascar 1Ã 2 3 RANDALL E. JUNGE , MEREDITH A. BARRETT , AND ANNE D. YODER 1St. Louis Zoo, St. Louis, Missouri 2Duke University Program in Ecology, Durham, North Carolina 3Department of Biology and Evolutionary Anthropology, Duke University, Durham, North Carolina Anthropogenic habitat disturbance impairs ecosystem health by fragmenting forested areas, introducing environmental contamination, and reducing the quality of habitat resources. The effect of this disturbance on wildlife health is of particular concern in Madagascar, one of the world’s biodiversity hotspots, where anthropogenic pressures on the environment remain high. Despite the conservation importance of threatened lemur populations in Madagascar, few data exist on the effects of anthropogenic disturbance on lemur health. To examine these impacts, indri (Indri indri) populations were evaluated from two forest reserves that differ in their exposure to anthropogenic disturbance. We compared the health status of 36 indri individuals from two sites: one population from a protected, undisturbed area of lowland evergreen humid forest and the other population from a reserve exposed to frequent tourism and forest degradation. Comparison of indri health parameters between sites suggests an impact of anthropogenic disturbance, including significant differences in leukocyte count and differential, 12 serum parameters, 6 trace minerals, and a higher diversity of parasites, with a significant difference in the presence of the louse, Trichophilopterus babakotophilus. These data suggest that indri living in disturbed forests may experience physiological changes and increased susceptibility to parasitism, which may ultimately impair reproductive success and survival. Am. J. Primatol. 73:632–642, 2011. r 2011 Wiley-Liss, Inc. Key words: Madagascar; Indri indri;lemurhealth;nutrition;wildlifehealthmonitoring;conservation INTRODUCTION preservation of endangered species [Acevedo- Whitehouse & Duffus, 2009; Smith et al., 2009; Madagascar is considered one of the world’s top Woodroffe, 1999]. Disease and contamination may conservation priorities owing to its unparalleled levels directly affect the survival of endangered host of diversity and endemism [Myers et al., 2000]. populations by reducing physical fitness or indirectly Intense pressure from habitat destruction and natur- by impairing reproductive success, suppressing popu- al resource extraction have contributed to the nearly lation size, or reducing resilience, all of which 80% reduction of core forests between 1950 and 2000 ultimately can regulate host populations [Cleaveland [Harper et al., 2007]. This deforestation has resulted et al., 2002; Hochachka & Dhondt, 2000]. in the fragmentation and degradation of Madagas- Monitoring serves to assess nutritional and car’s forest habitat, where as much as 90% of its health status, evaluate the presence of environ- endemic biodiversity resides [Allnutt et al., 2008; mental contaminants, identify disease risks, and Dufils, 2003; Elmqvist et al., 2007; Harper et al., alert managers to fluctuations in health parameters 2007]. This habitat degradation and other anthropo- from baseline levels. The majority of primate patho- genic disturbance, such as tourism and mining, have gens will exert long-term, sublethal effects that can profound effects on wildlife populations in Madagas- reduce population sustainability [Goldberg et al., car. Madagascar’s flagship wildlife species, the lemurs (Lemuriformes), are particularly vulnerable to anthropogenic habitat disturbance. Here, we explore Contract grant sponsors: St. Louis Zoo Field Conservation; these impacts on an endangered lemur species, Indri National Science Foundation. indri, by comparing the physiological parameters and ÃCorrespondence to: Randall E. Junge, MS, DVM, DACZM, Director of Animal Health, St. Louis Zoo, 1 Government Drive, parasite diversity of two indri populations in sites St. Louis, MO 63110.E-mail: [email protected] under differing levels of anthropogenic disturbance. Received 2 November 2010; revised 31 January 2011; revision Evaluation of the effects of anthropogenic distur- accepted 31 January 2011 bance, including habitat fragmentation, degradation, DOI 10.1002/ajp.20938 mining, and other human contact, on wildlife health Published online 22 February 2011 in Wiley Online Library and nutrition is critical for the management and (wileyonlinelibrary.com). r 2011 Wiley-Liss, Inc. Indri Health Evaluation / 633 2008a], and the only way to document these changes first created in 1927 and received the most protected is with consistent health monitoring. Health assess- natural reserve designation, Strict Nature Reserve, ments have been completed on a number of lemur in 1966 [Britt et al., 2002]. Consistent reserve species [Clough, 2010; Dutton et al., 2003, 2008; monitoring and environmental education around Garell & Meyers, 1995; Irwin et al., 2010; Junge & the reserve have been conducted by the Madagascar Garrell, 1995; Junge & Louis, 2002, 2005a,b, 2007; Fauna Group since 1990 and improve conservation Junge et al., 2008; Miller et al., 2007; Raharivololona, outcomes in the area. Previous studies estimated 2006; Raharivololona & Ganzhorn, 2009, 2010; a population of 77–147 indri living within BSNR Rainwater et al., 2009; Wright et al., 2009]. However, [Glessner & Britt, 2005]. when compared with other primates, there is a The AFC areas consist of fragmented mid- need for more data on the impacts of human altitude evergreen humid forest, including the disturbance on lemur health as well as an expanded protected areas of Analamazaotra Special Reserve inventory of lemur parasites [Irwin & Raharison, (810 ha), which borders the village of Andasibe, the 2009; Raharivololona & Ganzhorn, 2010]. Indri Analamazaotra Forest Station (700 ha), which is are threatened primarily from habitat loss and privately managed by the Mitsinjo Association, fragmentation as a result of agriculture, logging, and Torotorofotsy, a separate conservation area hunting, and mining within Madagascar [Britt et al., (9,900 ha). Analamazaotra Special Reserve and the 2002]. The largest of the extant lemur species Forest Station experience high tourist visitation (5–7 kg), indri are diurnal, folivorous primates found owing to their convenient location to the capital city in the low to mid-altitude rainforests of eastern of Antananarivo (combined, up to 29,000 foreign Madagascar [Mittermeier et al., 2006; Powzyk & tourists per year [R. Dolch, personal communica- Mowry, 2003]. This fragmented nature of indri tion]). Analamazaotra Forest Station primarily con- subpopulations, as well as the lack of a thriving sists of secondary growth forest, which sustains an captive population, present serious conservation estimated population of 21–32 indri in at least seven challenges for this species [Britt et al., 2002]. Indri groups. These animals are habituated to humans are classified as endangered by the IUCN Red List and have frequent close interactions with guides and [Andrainarivo et al., 2008]. visitors. Torotorofotsy, also a mix of primary and Populations of lemurs in disturbed habitats secondary forest, has recently been preserved after show compromised physiological parameters, indica- the discovery of Prolemur simus, one of the world’s tive of reduced health [Irwin et al., 2010]; yet, more top 25 most endangered primates, within its bound- research is needed on the effects of anthropogenic aries [Konstant et al., 2005]. Three kilometers from disturbance on lemur health [Irwin et al., 2010]. In this site, a large lateritic nickel mining project is order to assess the potential health effects of habitat under construction, with an annual capacity of 60,000 fragmentation, mining, and anthropogenic exposure tons of nickel and 5,600 tons of cobalt per year. on indri, we compared indri populations in disturbed Construction on the slurry pipeline began in 2007, and undisturbed forest reserves in Madagascar that and production to begin in 2011 and continue for differed in their exposure to humans. The study, approximately 27 years [Dickinson & Berner, 2010]. presented here, advances knowledge on the effects of environmental change and anthropogenic exposure on patterns of both indri and lemur health and para- Sample Collection sitism as a whole [Irwin & Raharison, 2009; Irwin We conducted health evaluations on indri as et al., 2010; Junge & Sauther, 2007; Raharivololona part of the ongoing Prosimian Biomedical Survey & Ganzhorn, 2009; Wright et al., 2009]. Project, a project that has assessed more than 550 lemurs of 31 species within 17 sites, since 2000 METHODS [Dutton et al., 2003, 2008; Irwin et al., 2010; Junge & Garrell, 1995; Junge & Louis, 2002, 2005a,b, 2007; Study Areas Junge et al., 2008]. This project is structured to Indri populations were evaluated from two sites provide collaboration between field biologists and that varied in their disturbance level: Betampona veterinarians involved in conservation projects through- Strict Nature Reserve (BSNR; S17.931389; out Madagascar. Veterinarians provide basic medical E49.20333) and forest fragments within a complex assistance as needed, and collect standard biomedical of forests we will refer to as the Analamazaotra samples and health information from animals anes- Forest complex (AFC; S18.93145; E48.41026). Both thetized or captured for other purposes. Activities in studies occurred
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