The Distribution, Habitat Use, and Conservation Status of Three Atlantic Forest Monkeys (Sapajus xanthosternos, Callicebus melanochir, Callithrix sp.) in an Agroforestry/Forest Mosaic in Southern Bahia, Brazil
Tóm tắt
If we are to develop effective conservation strategies for primates in heavily disturbed biomes, we must understand why they persist or perish in human-dominated landscapes. I investigated the potential of an agroforestry/forest mosaic in the Atlantic forest of Bahia, Brazil to sustain populations of three monkey species —capuchins (Sapajus xanthosternos), titi monkeys (Callicebus melanochir), and marmosets (Callithrix sp.)— sampling the primates in three forest and four agroforestry landscapes across a 1000 km2 landscape during a 17-yr study. I used 754 km of transects, reconnaissance walks, semistructured interviews, and key informant reports to collect information on the monkeys. Capuchins and titi monkeys are mostly restricted to the largest forests, with titi monkeys widely distributed and capuchins nearly extinct. Both species are absent from the Attalea funifera forests, but a few capuchins persist in the Brodiguesia santosii forests. Marmosets live throughout the landscape and are the only species inhabiting the agroforestry lands. The abundance data indicate that the disturbed forests characteristic of the landscape provide adequate habitat for all three species, but chronic hunting suppresses titi and capuchin populations and limits their distributions. Data from the Reserva Ecológica Michelin show that protected monkey populations can reach abundances equal to those at other protected sites, and that capuchins and titi monkeys enter agroforestry lands when protected. Long-term data indicate that deforestation rates are low and that illegal logging and hunting pressure are declining. The creation of reserves and the relatively large amount of forest left make the regional landscape a vital part of the strategy to conserve these species. This study demonstrates that agroforestry/forest landscapes can play an important role in primate conservation when large blocks of contiguous forest with adequate escape space for hunted primates remain, but that the potential conservation value of agroforestry habitats and small forest fragments for hunted species will be realized only if hunting is controlled.
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