Distribution
A 2003 study identified some 788 groups of this subspecies in the wild across the three islands, in group sizes averaging 36 individuals, although groups of up to 56 were recorded. The groups are composed of multiple adult males and females, together with their immature offspring. Adult females in a group outnumbered the adult males by a general ratio of 4:1, with the ratio of immature young macaques to adult females being near-equal, indicative of a healthy population replenishment.
Apart from these populations in the wild, only a single group (as of 2002) of some 17 individuals is held in an Indian zoo for captivity breeding and research purposes.
Populations of this subspecies are particularly noted in the Great Nicobar Biosphere Reserve, and its two constituent National parks of India, Campbell Bay National Park and Galathea National Park. Although these regions are protected areas, and the animal is classified as a Schedule I animal under India's 1972 Wildlife (Protection) Act, the increasing encroachment of settlements and farmlands in adjoining areas of the southeastern part of the island has led to some problems with the local inhabitants. Bands of Nicobar Long-tailed Macaques have been reported as damaging the settlers' crops, and a few macaques have been illegally killed. In particular, they are sometimes hunted or trapped to protect coconut plantations.
crab-eating macaques on Great Nicobar have long been hunted for subsistence by the indigenous Shompen peoples of Great Nicobar, although they do not form a substantial part of their diet.
As with other primates whose habitats overlap with or are encroached upon by human settlement activities, there is some risk of zoonotic disease transference to individuals who come into close contact with them. One 1984 study has identified their susceptibility to malarial parasites.
Read more about this topic: Nicobar Long-tailed Macaque
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