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The Rio Mayo titi (''Callicebus oenanthe'') is a species of titi, a type of New World monkey, endemic to Peru.The Rio Mayo titi, though previously believed to have a small range of origin in the Alto Mayo valley, research has proven that the range extends southward and reaches the Huayamba River,〔http://content.ebscohost.com/pdf25_26/pdf/2011/IJP/01Aug11/62910120.pdf?T=P&P=AN&K=62910120&S=R&D=aph&EbscoContent=dGJyMNLe80SeqLI4zdnyOLCmr0uep69SsKq4SrKWxWXS&ContentCustomer=dGJyMPGutkyura9PuePfgeyx44Dt6fIA〕 as well as Bajo Mayo. It has been classified as vulnerable but due to major habitat loss and restricted living space, it is better classified as Critically Endangered. In October 2012, it was included in The World's 25 Most Endangered Primates list. An increase in deforestation is leading to the decrease in available living space for the Titi monkey, forcing it to live in sympatry with another species of Callicebus.〔 Yet in some areas, such drastic deforestation has resulted in extremely high population density. The Titi Monkey is better adapted to moderately populated areas, thus overpopulation negatively impacts the species.〔http://dpc.uba.uva.nl/ctz/vol77/nr01/art01〕 The forests the Titi monkey lives in are being destroyed for agricultural purposes, leaving little forest for the monkeys. They were only seen a few times and featured in museums until 2003 when more research was done on them. In order for this species to survive, their forests need to be protected to avoid overpopulation. Different conservation groups are working to help ''C. oenanthe'' survive. Neotropical Primate Conservation, Proyecto Mono Tocón and Amazónicos para la Amazonia are working in the more southern areas to protect the monkey.〔http://www.primate-sg.org/storage/pdf/PC26_Shanee_GIS%20risk%20assessment_C.%20cupreus.pdf〕 The Titi Monkey is a fairly inconspicuous creature, making observation and research difficult to obtain. Therefore, the traditional use of transect observation to monitor the monkey's population, is less effective. Instead, other methods of calculating the titi monkey's density in certain areas have been taken, such as research into the species-specific calls endemic to a certain area. ==Location, Habitat and Activity== Rio Mayo Titis usually live in dry woodland areas with a lot of vines and plants. They are found in the Atlantic Coast of Brazil and in tropical areas of the Amazon, the upper Paraguay basin, in Boirio, and Santra Cruz. They are found in Peru in the northern part of the Department of San Martin, at altitudes of 750–950 meters and also in the foothills of the Andes. One ''C. oenanthe'' family was studied by scientist DeLuycker from October 2004 to September 2005. The studied family consisted of a mother and father, two offspring, and a baby born within the study period. The family was observed to live in bamboo stands and low forests with trees with a mean height of 6.8 meters. The family used only five sleeping sites during the year-long study time, two of them only rarely. Sleeping and resting was the most common activity, followed by traveling, and then eating and foraging. The ''C. oenanthe'' also socialized with others of their own kind. However, forest degradation and disturbed habitats had a negative effect on ''C. oenanthe'' sociability. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rio Mayo titi」の詳細全文を読む スポンサード リンク
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