INVESTIGADORES
LAMMERTINK Jeroen Martjan
artículos
Título:
Population size, Red List status and conservation of the Natuna leaf monkey Presbytis natunae endemic to the island of Bunguran, Indonesia
Autor/es:
LAMMERTINK, M.; SETIORINI, U.; NIJMAN, V.
Revista:
ORYX
Editorial:
CAMBRIDGE UNIV PRESS
Referencias:
Año: 2003 vol. 37 p. 472 - 479
ISSN:
0030-6053
Resumen:
We present the first population estimate for the Natuna leaf monkey
Presbytis natunae, endemic to the island of Bunguran, Indonesia, based
on a 2-month survey. Bunguran has a land area of only 1,605 km(2) and
was until 1980 largely covered in primary forest. At present primary
forest exists only in small patches within a matrix of logged forest,
which covers nearly 70% of the island. Natuna leaf monkeys are confined
to forest and have a preference for primary lowland forest patches.
Groups average 3.5+/-SD 2.0 individuals and occur in a density of
2.3+/-SD 1.1 groups per km(2). Extrapolation of the density estimates to
the entire island indicates that <10,000 individuals remain in two
subpopulations. On Bunguran these monkeys make popular pets and the
species is threatened in part by the demand for captive individuals but
mostly by continuing degradation and reduction of forest. An assessment
of the species following IUCN threat criteria indicates that it should
be categorized as Vulnerable. We make a number of recommendations for
the conservation of the species, most importantly the implementation by
the district government of Natuna of two strict conservation areas on
the island, and the maintaining of a larger area of sustainably used
natural forest.