such as "Introduction", "Conclusion"..etc
The principal objectives of a reintroduction project are to
establish a viable, free-ranging population in the wild, of a species,
which has become globally or locally extinct in the wild . Within this reintroduction concept there are two types of reintroduction: (a) re-establishment: the use of captive-bred animals to re-establish an extinct population and (b) stocking reintroduction which involves supplementing a declining population with captive-bred animals .
I propose a third definition: 'population reintroduction' which should
refer to the use of wild-born, captive-raised animals to re-establish a
population where it has become locally extinct, but only if the area
can be adequately protected. Reintroduction addresses conservation on
two levels: (1) animals kept illegally as pets are rescued,
rehabilitated and returned to the wild, thereby addressing the illegal
trade in wild animals and the welfare of these animals while in
captivity and (2) by reintroducing animals into areas where they are
locally extinct, the wild populations are supplemented and additional
areas of forest can be protected. Reintroduction may be the only viable
way of repopulating areas of forest that have been devastated by
For rehabilitation to succeed, equal care and planning should go
into both the pre-release and post-release phases. Past experience has
identified several factors that affect the success of the release of
previously held captive animals: negative impact on the native flora
and fauna (chimpanzees and orang-utans, ), mortality due to animals being unused to natural predators in the release site (golden lion tamarins, ), poaching, traffic, shooting by humans (drills, ), inter- and intra-specific competition (gibbons, ), and poor habitat quality at the release site (gibbons, pers. obs.).
With post-release, not only must the animal's behaviour be
monitored, but also the habitat of the release site must be surveyed
adequately. Providing that a detailed habitat survey is carried out
prior to the release, there should be limited impact on the native
flora and fauna by gibbons. Post-release monitoring of forest as well
as individuals must be as comprehensive as possible and should follow
established scientific data collection methods. The result of poorly
planned releases and reintroduction of primates has clear results:
failure of the primates to adapt to the wild, failure of the population
to increase and negligible conservation impact.
Here I present data from the habitat survey of an island where a pair of captive-raised adult Hylobates agilis albibarbis were
released in January 2003 from the Kalaweit Gibbon Rehabilitation
Project in Central Kalimantan. The habitat analysis was carried out to
ensure that the island was capable of supporting the gibbons and the
resident wildlife i.e "can Mintin Island sustain a population of
gibbons, and if so, how large a population?"
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