"These figures are from disparate sources and may not be internally consistent. For example, Irwin et al., (2005) found a higher population size for P. edwardsi than the earlier estimate of Mittermeier et al., (1994); hopefully further studies will increase the estimated population size of P. cand id us and P. diadema.
'Abbreviations: NP, National Park; RNI, Integral Nature Reserve; SR, Special Reserve. ' Following IUCN Red List of Threatened Species, www.redlist.org, accessed 9 September 2005.
"'References: 1, Mittermeier et al., (1994); 2, Banks et al., (in press); 3, Vargas et al., (2002); 4, Goodman and Ganzhorn (2004); 5, Irwin (unpublished); data); 6. Irwin et al., (2005).
'' P. perrieri was previously found at Ankarana Special Reserve, west of Analamera (Hawkins et al., 1990); more recent surveys (Banks et al., in press) failed to locate sifakas at Ankarana, suggesting they have been extirpated.
'"No study has expressly measured this taxon's altitudinal range; Banks (personal communication) recorded P. perrieri census sightings between 56 and 249 m, but as Analamera Special Reserve has an altitudinal range of-0-750 m, the true range for this taxon could be higher.
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