Karimunjawa long-tailed macaque

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Karimunjawa long-tailed macaque
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Suborder: Haplorhini
Infraorder: Simiiformes
Family: Cercopithecidae
Genus: Macaca
Species:
Subspecies:
M. f. karimondjawae
Trinomial name
Macaca fascicularis karimondjawae
Sody, 1949
Karimunjawa 2019-09-13 Landsat 8 T1 TOA.jpeg
Karimunjawa archipelago, north of Java, Indonesia

The Karimunjawa long-tailed macaque (Macaca fascicularis karimondjawae) is one of the seven recognized island subspecies of crab-eating macaques (Macaca fascicularis). [1] [2] This subspecies is endemic to two islands in the Karimunjawa archipelago (i.e., Karimunjawa and Kemujan islands), located about 80km north of Java, Indonesia. [3] The Karimunjawa long-tailed macaque subspecies is distinguished by its dark dorsal pelage. [2] Due to a decline in habitat and human-macaque conflict issues this subspecies is considered Critically Endangered by the International Union for Conservation of Nature (IUCN). [1]

Contents

Etymology

Macaca fascicularis karimondjawae is commonly known as the Karimunjawa long-tailed macaque, referring to the main island on which they occur. [1] In Indonesia, this species is referred to as kera or monyet ekor panjang. [1] M. f. karimondjawae was first described as a subspecies of Macaca irus (I. Geoffroy Saint-Hilaire, 1826), a synonym for Macaca fascicularis (Raffles, 1821). [1] [2]

Characteristics and morphology

During the last glacial maximum 18 thousand years ago, sea levels were lower than present allowing Macaca fascicularis to disperse over dry land to what are now shallow-water islands (including the Karimunjawa archipelago). Between 18 and 5 thousand years ago, sea levels rose to present levels and populations became isolated. [2] After isolation, the long-tailed macaque populations on shallow-water fringing-islands tended to become darker in color, with the M.f. karimondjawae population having the darkest pelage of shallow-water fringing-island populations. Their dorsal pelage tends to be dark grayish brown with pale yellowish annulations of dorsal hair and the crown tends to have a blackish wash. [2]

Population

At present, there is no published data on the size of the long-tailed macaque population on Kemujan island, but they are reported to be there and have been estimated to be between 30-50 individuals. [1] [3]

In 2008, a population survey of the long-tailed macaques was conducted on Karimunjawa island. The population was estimated at 269 individuals and found in three sites (i.e., Kemloko, Legon Lele, and Nyamplungan). At this time, the total population of M.f. karimondjawae was estimated to be less than 500 individuals. [3]

Another population survey was conducted in 2017 by the Karimunjawa National Park staff and the population was estimated at 192 individuals in the same three locations as the 2008 assessment. [1]

Distribution

The Karimunjawa long-tailed macaque is only found on Karimunjawa and Kemujan islands, which are shallow-water islands that are part of the Karimunjawa archipelago, north of Java, Indonesia. [2] [3] Karimunjawa and Kemujan islands are connected by a short land bridge and the extent of occurrence was calculated as 27 km^2. [1] On these islands, long-tailed macaques are found in mangrove forests and coastal and lowland tropical rainforest. [3]

Assessments indicate that the area of occupancy (AOO) of the Karimunjawa long-tailed macaque is shrinking; in 2008, the AOO was estimated to be 23.47 km^2, yet in 2017 the AOO was estimated at 12.86 km^2. [1]

Behavior

To preface, little information is written on the specific behavior of this particular subspecies of long-tailed macaque, long-tailed macaque subspecies share a lot of similarities, but they do exhibit quite a bit of variation as well. [4] Long-tailed macaques live in matrilineal groups. [5] [6] The 2008 population survey of M.f. karimondjawae counted 23 groups and a total of 269 individuals. [3] Because the 2017 survey indicated a decrease in population, [1] the number of groups may have also decreased. Long-tailed macaque groups size varies considerably (<10>85), [5] but smaller groups are found in mangrove forests, [5] like those where the Karimunjawa subspecies exist. [3] Groups often exhibit female philopatry with males emigrating from natal group at puberty. [5] [7] In long-tailed macaques, overlap of home ranges of adjacent groups is usually slight, but on smaller islands group overlap can be extensive. [2] Long-tailed macaques living near water are known to be accomplished swimmers. [5]

Threats

Significant levels of human-macaque conflict have been reported on Karimunjawa island. [3] The human inhabitants on the island are mainly farmers and fisherman, they depend on limited natural resources on the island which puts them in direct competition with the macaques. [1] [3]

Conservation

In 2022, the Karimunjawa long-tailed macaque was assessed as Critically Endangered on the IUCN's Red List. This assessment was based on the fact that this subspecies is found only in a single location (as defined by the IUCN) and faces a decline in habitat quality, in addition to significant human-macaque conflict issues. From the 2017 population assessment, the total population is estimated to be less than 250 individuals. The previous IUCN listing for this subspecies in 2008 and 2020 was Data Deficient. [1]

Related Research Articles

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The macaques constitute a genus (Macaca) of gregarious Old World monkeys of the subfamily Cercopithecinae. The 23 species of macaques inhabit ranges throughout Asia, North Africa, and Europe. Macaques are principally frugivorous, although their diet also includes seeds, leaves, flowers, and tree bark. Some species such as the long-tailed macaque will supplement their diets with small amounts of meat from shellfish, insects, and small mammals. On average, a southern pig-tailed macaque in Malaysia eats about 70 large rats each year. All macaque social groups are arranged around dominant matriarchs.

<span class="mw-page-title-main">Crab-eating macaque</span> Species of monkey from Southeast Asia

The crab-eating macaque, also known as the long-tailed macaque or cynomolgus macaque, is a cercopithecine primate native to Southeast Asia. As a synanthropic species, the crab-eating macaque thrives near human settlements and in secondary forest. Crab-eating macaques are plastic in their attributes and roles ranging from smart and adaptive, to sacred, to vermin and pest to resource in biomedical research. They have been described as a species on the edge, living on the edge of forests, rivers, and seas, at the edge of human settlements, and maybe on the edge of population decline.

<span class="mw-page-title-main">Rhesus macaque</span> Species of Old World monkey

The rhesus macaque, colloquially rhesus monkey, is a species of Old World monkey. There are between six and nine recognised subspecies that are split between two groups, the Chinese-derived and the Indian-derived. Generally brown or grey in colour, it is 47–53 cm (19–21 in) in length with a 20.7–22.9 cm (8.1–9.0 in) tail and weighs 5.3–7.7 kg (12–17 lb). It is native to South, Central, and Southeast Asia and has the widest geographic range of all non-human primates, occupying a great diversity of altitudes and a great variety of habitats, from grasslands to arid and forested areas, but also close to human settlements. Feral colonies are found in the United States, thought to be either released by humans or escapees after hurricanes destroyed zoo and wildlife park facilities.

<span class="mw-page-title-main">Barbary macaque</span> Species of Old World monkey

The Barbary macaque, also known as Barbary ape, is a macaque species native to the Atlas Mountains of Algeria, Tunisia and Morocco, along with a small introduced population in Gibraltar. It is the type species of the genus Macaca. The species is of particular interest because males play an atypical role in rearing young. Because of uncertain paternity, males are integral to raising all infants. Generally, Barbary macaques of both sexes and all ages contribute in alloparental care of young.

<span class="mw-page-title-main">Lion-tailed macaque</span> Species of Old World monkey

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<span class="mw-page-title-main">Celebes crested macaque</span> Species of Old World monkey

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<span class="mw-page-title-main">Arunachal macaque</span> Species of Old World monkey

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<span class="mw-page-title-main">Toque macaque</span> Species of Old World monkey

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<span class="mw-page-title-main">Assam macaque</span> Species of Old World monkey

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<span class="mw-page-title-main">Booted macaque</span> Species of Old World monkey

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<span class="mw-page-title-main">Stump-tailed macaque</span> Species of Old World monkey

The stump-tailed macaque, also called the bear macaque, is a species of macaque native to South Asia and Southeast Asia. In India, it occurs south of the Brahmaputra River, in the northeastern part of the country. Its range in India extends from Assam and Meghalaya to eastern Arunachal Pradesh, Nagaland, Manipur, Mizoram and Tripura.

<span class="mw-page-title-main">Nicobar long-tailed macaque</span> Subspecies of Old World monkey

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<span class="mw-page-title-main">Pagai Island macaque</span> Species of Old World monkey

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References

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