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The Relationship between Tail Length and Elevation in Toque Macaques (Macaca sinica) in the Natural Habitat: usinga Quick Non-Invasive Method for Measuring Body to Tail Proportions

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dc.contributor.author Huffman, M.A.
dc.contributor.author Kumara, R.
dc.contributor.author Nahallage, C.A.D.
dc.contributor.author Kawamoto, Y.
dc.contributor.author Jayaweera, P.M.
dc.date.accessioned 2017-10-20T06:42:45Z
dc.date.available 2017-10-20T06:42:45Z
dc.date.issued 2016
dc.identifier.citation Huffman, M.A., Kumara, R., Nahallage, C.A.D., Kawamoto, Y., Jayaweera, P.M. (2016). "The Relationship between Tail Length and Elevation in Toque Macaques (Macaca sinica) in the Natural Habitat: usinga Quick Non-Invasive Method for Measuring Body to Tail Proportions", Proceedings of Asian Primate Symposium 2016, p. 64 en_US, si_LK
dc.identifier.uri http://dr.lib.sjp.ac.lk/handle/123456789/5948
dc.description.abstract Attached en_US, si_LK
dc.description.abstract The toque macaque o f Sri Lanka is classified into 3 sub-species; Macaca sinica sinica (dry zone), M. s. aurifrons (wet zone) and M. s. opisthomelas (hill zone), based on a combination o f phenotypical traits and climatic and ecological habitat distribution. We investigated the relationship between altitude and sub-species on relative tail length. Digital profile photographs were taken of 167 individual toque macaques from 27 localities distributed along elevationaf' (2~2129 masl) and climatic zones across the island. From these photos we created a pixelated proxy for tail length (base to tip) and body trunk length (base o f neck to base o f tail) o f each individual macaques using “Home o f LibreCAD, 2D-CAD” free ware (http://librecad.org/cms/home.html). From these measurements, we calculated a tail-to-trunk index (IT index) for the relative proportion o f tail to body length. A statistically significant relationship was found between T-T index and elevation (LMM 15.45, p < 0.0001). With every 100 m o f elevation increase, the TT index decreased by 0.031 (SE + 0.007). This morphological variation seems to be an adaptation to environmental conditions. This simple method is a promising new application for the non-invasive morphometric analysis o f species traits in the field.
dc.language.iso en_US en_US, si_LK
dc.publisher Proceedings of Asian Primate Symposium 2016 en_US, si_LK
dc.subject toque macaque en_US, si_LK
dc.subject non-invasive methods en_US, si_LK
dc.subject morphometrics en_US, si_LK
dc.subject elevation en_US, si_LK
dc.subject relative tail length en_US, si_LK
dc.subject relative body trunk length en_US, si_LK
dc.title The Relationship between Tail Length and Elevation in Toque Macaques (Macaca sinica) in the Natural Habitat: usinga Quick Non-Invasive Method for Measuring Body to Tail Proportions en_US, si_LK
dc.type Article en_US, si_LK


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