A Conservation Action Plan for the Mentawai Primates

Whittaker, Danielle J.

doi:10.1896/0898-6207.20.1.95

Cited by 36 publications

(54 citation statements)

References 22 publications

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“…The largest population of Kloss's gibbons is found in Siberut National Park, where there are 13,000-15,000 gibbons (Whittaker 2005a). Although this area has formal protection, there are a number of problems such as lack of enforcement of hunting laws, insufficient personnel, and encroachment of surrounding logging operations (Whittaker 2006). This large population has the greatest chance of surviving, as long as it is not neglected.…”

Section: Conservation Planningmentioning

confidence: 99%

“…Additionally, mitochondrial DNA and vocal analyses may be overlooking differentiation among Kloss's gibbon populations. Although efforts to set aside areas for conservation in the Pagais have been unsuccessful, potentially viable primate populations exist within the selectively logged and regenerating areas of the PT Minas Pagai Lumber logging concession (Paciulli 2004;Whittaker 2006). In addition to this 130 km 2 of ''Limited Production Forest,'' the company has set aside about 78 km 2 of Buffer Zone and Conservation Areas to preserve genetic diversity of the tree stocks.…”

Section: Conservation Planningmentioning

confidence: 99%

“…In addition to this 130 km 2 of ''Limited Production Forest,'' the company has set aside about 78 km 2 of Buffer Zone and Conservation Areas to preserve genetic diversity of the tree stocks. Collaborating with this company to reduce hunting within the logging concession may be the best way to preserve the primates in the Pagai Islands (Whittaker 2006).…”

Section: Conservation Planningmentioning

confidence: 99%

“…The only other gibbon to share these behavioral characteristics is the closely related Javan silvery gibbon (H. moloch) (Takacs et al 2005;Geissmann and Nijman 2006;Whittaker et al 2007). The Kloss's gibbon is endemic to the Mentawai Islands, located off the west coast of Sumatra in Indonesia, and is endangered as a result of continuing deforestation and hunting (Whittaker 2006). Since the 1970s, researchers have advocated increasing protection of this unusual species (McNeely 1978;World Wildlife Fund 1980;Tenaza 1988;Fuentes 1996Fuentes /1997Kobold et al 2003;Paciulli 2004;Whittaker 2005aWhittaker , 2006, but conservation planning has suffered from a lack of knowledge about intraspecific variation throughout the Mentawais.…”

Section: Introductionmentioning

confidence: 99%

“…The largest and northernmost island of Siberut is home to the only protected area in the Mentawais, Siberut National Park, which at 1,926 km 2 comprises nearly half of the island. Logging concessions and oil palm plantations make up much of the area outside the park (Whittaker 2005b(Whittaker , 2006. Sipora is the most developed of the four islands and is home to the regency capital, Tua Pejat.…”

Section: Introductionmentioning

confidence: 99%

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Phylogeography of Kloss’s Gibbon (Hylobates Klossii) Populations and Implications for Conservation Planning in the Mentawai Islands

Whittaker

2009

The Gibbons

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Section: Conservation Planningmentioning

confidence: 99%

Section: Conservation Planningmentioning

confidence: 99%

Section: Conservation Planningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Phylogeography of Kloss’s Gibbon (Hylobates Klossii) Populations and Implications for Conservation Planning in the Mentawai Islands

Whittaker

2009

The Gibbons

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Distribution and abundance of sacred monkeys in Igboland, southern Nigeria

Baker

Tanimola

Olubode

et al. 2009

American J Primatol

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Although primates are hunted on a global scale, some species are protected against harassment and killing by taboos or religious doctrines. Sites where the killing of sacred monkeys or the destruction of sacred groves is forbidden may be integral to the conservation of certain species. In 2004, as part of a distribution survey of Sclater's guenon (Cercopithecus sclateri) in southern Nigeria, we investigated reports of sacred monkeys in the Igbo-speaking region of Nigeria. We confirmed nine new sites where primates are protected as sacred: four with tantalus monkeys (Chlorocebus tantalus) and five with mona monkeys (Cercopithecus mona). During 2004-2006, we visited two communities (Akpugoeze and Lagwa) previously known to harbor sacred populations of Ce. sclateri to estimate population abundance and trends. We directly counted all groups and compared our estimates with previous counts when available. We also estimated the size of sacred groves and compared these with grove sizes reported in the literature. The mean size of the sacred groves in Akpugoeze (2.06 ha, n = 10) was similar to others in Africa south of the Sahel, but larger than the average grove in Lagwa (0.49 ha, n = 15). We estimated a total population of 124 Sclater's monkeys in 15 groups in Lagwa and 193 monkeys in 20 groups in Akpugoeze. The Akpugoeze population was relatively stable over two decades, although the proportion of infants declined, and the number of groups increased. As Sclater's monkey does not occur in any official protected areas, sacred populations are important to the species' long-term conservation. Despite the monkeys' destruction of human crops, most local people still adhere to the custom of not killing monkeys. These sites represent ideal locations in which to study the ecology of Sclater's monkey and human-wildlife interactions.

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Demography of Simakobu (Simias concolor) and the Impact of Human Disturbance

Erb

Borries

Lestari³

et al. 2012

American J Primatol

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Asian colobines typically live in small one-male groups (OMGs) averaging five adult females, but Simias concolor (simakobu or pig-tailed langur) is considered an exception because mostly adult male-female pairs have been reported. However, based on their phylogenetic position and marked sexual dimorphism, simakobu are also expected to form OMGs with multiple females. The preponderance of small groups could be the result of human disturbance (hunting or habitat disturbance) reducing group size in the recent past. To investigate this possibility, we documented the demography of ten wild simakobu groups from January 2007 until December 2008 at an undisturbed site, the Peleonan Forest, Siberut Island, Indonesia. We assessed the population-specific size and composition of groups and documented demographic changes due to births, disappearances, and dispersals throughout our 2-year study. We found OMGs with 3.0 adult females on average in addition to all-male groups, but no adult male-female pairs. The ratio of 0.5 infants per adult female (and 0.64 births per female-year in focal groups) suggested that birth rates were similar to those of other Asian colobines. In 5.1 group-years, we observed six dispersal events and six temporary presences (i.e., less than 3 months' residency). Both males and females dispersed, and juveniles seemed to disperse more frequently than adults. To assess the impact of human disturbance on simakobu demography, we compiled data for seven additional populations from the literature and compared them using multiple regressions. Adult sex ratio and the number of immatures per group were influenced negatively by hunting and positively by habitat disturbance while reproductive rates were not significantly affected by either variable. These findings suggest that adult male-female pairs may result from hunting pressure reducing group size, and that conservation action to reduce hunting in the Mentawai Islands is needed to ensure the survival of this critically endangered species.

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A Conservation Action Plan for the Mentawai Primates

Cited by 36 publications

References 22 publications

Phylogeography of Kloss’s Gibbon (Hylobates Klossii) Populations and Implications for Conservation Planning in the Mentawai Islands

Phylogeography of Kloss’s Gibbon (Hylobates Klossii) Populations and Implications for Conservation Planning in the Mentawai Islands

Distribution and abundance of sacred monkeys in Igboland, southern Nigeria

Demography of Simakobu (Simias concolor) and the Impact of Human Disturbance

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