Analisis Variasi Bentuk Karapaks Kuya Batok (Cuora amboinensis Daudin, 1802) dan Bajuku (Orlitia borneensis Gray, 1873) dengan Metode Elliptic Fourier Descriptors

Tony Febri Qurniawan (1) , Dina Rusiana (2) , Abdul Rachman (3)

(1) Laboratorium Anatomi Hewan, Fakultas Biologi Universitas Gadjah Mada
(2) Laboratorium Anatomi Hewan, Fakultas Biologi Universitas Gadjah Mada
(3) Laboratorium Anatomi Hewan, Fakultas Biologi Universitas Gadjah Mada


Turtles is easily identified because of its shield. The dorsal shield or commonly called carapace is one of characteristics that can be used for turtle’s identification. People and researchers usually can distinguish the turtles just by looking at the carapace valve, but not in carapace shape. Both of them sometimes have their own interpretation about it, because carapace shape has a variation. This research was aimed to obtain some information about differences of carapace shape variation between Coura amboinensis and Orlitia borneensis quantitatively and also to investigate about characteristic of variation on carapace shape of a species. The specimens were taken from Pusat Penyelamatan Satwa Jogja. The picture of carapace shape of the turtles was changed into bitmap then processed used SHAPE ver 1.3. The variation of carapace contour were extracted by image processing, described and analyzed by Elliptic Fourier Descriptors. Mathematically independent shape characteristics were then indentified by Principal Component Analysis of The Elliptic Fourier Descriptors. Principal components represented the aspect ratio of the broad size, length size, and curve or roundness margin of the carapace. Based on result showed that intraspecies variation shape of carapace on C. amboinensis and on O. borneensis can be analysis into 3 principal component. The principal component 1st (PC1), 2nd (PC2) and 3rd (PC3) components accounted for 82.77%, 10.3% and 4.73%  of total shape variation on C. amboinensis. The 1st, 2nd and 3rd components accounted for 88.1%, 7.02% and 3.71% of total shape variation on O. borneensis. The contribution ratio of PC1 was over 80% on both of species, showing that most of the variation on carapace shape could be explained by the aspect ratio. The PC2 and PC3 were less than 20%, indicated that there is small asymmetric variation degree of roundness on carapace.

Kata Kunci

Cuora amboinensis, Orlitia borneensis, carapace, Eliptical Fourier Deskriptors (EFDs)

Teks Lengkap:



Barbour, R. and C. Ernst. 1992. Turtles of the World. Smithsonian Institute Press. pp: 280

Baltanas, A., M. Otero, L. Aqueros, G. Rossetti and Valeria Rosii. 2000. Ontogenic changes in the carapace shape of the non-marine ostracod Eucypris virens (Jurine). Hydrobiologia 419: 65-72

Bertin, A., David B., Cezilly F., and Alibert P. 2002. Quantification of sexual dimorphism in Asellus aquaticus (Crustacea: Isopoda) using outline approaches. Biol J Linn Soc 77: 523–533

Christensen, A.M. 2004. Assessing the variation in individual frontal sinus outlines. Am J Phys Anthropol 127: 291–295

Daegling, D.J. and W.L. Jungers. 2000. Elliptical Fourier analysis of symphyseal shape in great ape mandibles. J Hum Evol 39: 107–122

de Aranzamendi, M.C., J.J. Martinez, and R. Sahade. 2010. Shape differentiation and charactherization in the two morphotypes of the Antartic limpet Nacella concina using elliptical Fourier anlysis of shells. Polar biol 33: 1163-1170

de Rooij, N. 1915. The Reptiles of The Indo–Australian Archipelago, Lacertilia. Chelonia, Emydosauria. Volume I. E J Brill Ltd. Leiden

Dommergues E., J.L. Dommergues, F. Magniez, P. Neige and E.P. Verrecchia. 2003. Geometric measurement analysis versus Fourier series analysis for shape characterization using the gastropod shell (Trivia) as an example. Math Geol 35: 887–894

Hutchins, M., J.B. Murphy and N. Schlager. 2003. Grizimek’s Animal Life Encyclopedia second edition Volume 7 Reptiles. Gale Group. Farmington Hill

Iskandar, D.T. 2000. Kura-kura dan Buaya. PAL Media Citra. Bandung.

Iwata, H., N. Hirohisa, N. Seishi, T. Yasushi and U. Yasuo. 2002. Diallel Analysis of Leaf Shape Variations of Citrus Varieties on Elliptic Fourier Descriptor. Breeding Science 52: 89-94

Iwata, H., H. Nesumi, M. Seiji, T. Yasushi and U. Yasuo. 2002. The evaluation of Genotype x Environment Interactions of Citrus leaf Morphology using Image Analysis and Elliptical Fourier Descriptors. Breeding Science 52: 243-251

Iwata, H., Satoshi, N., Seiji, M., Yasushi, T. and Yasuo, U. 2004. Interaction between Genetic Effects and Soil Type in diallel Analysis of Root Shape and Size of Japanese Radish (Raphanus sativus L.). Breeding Science 54: 313-318

Kamilari, M. and S. Sfenthourakis. 2009. A morphometric approach to the geographic variation of the terrestrial isopod species Armadillo tuberculatus (Isopoda: Oniscidea). J Zool Syst Evol Res 47: 219–226

Kuhl, F.P. and C.R. Giardina. 1982. Elliptic Fourier features of a closed counter. Comp. Graph. Ima. Proc. 18: 236-258

Loy A., S. Busilacchi, C. Costa, F. Ferlin and S. Cataudella. 2000. Comparing geometric morphometrics and outline fitting methods to monitor fish shape variability of Diplodus puntazzo (Teleostea: Sparidae). Aquacult Eng 21: 271–283

Monti, L., M. Baylac and B. Lalane-Cassou. 2001. Elliptic Fourier analysis of the form of genitalia in two Spodoptera species and their hybrids (Lepidoptera: Noctuidae). Biol J Linn Soc 72: 391–400

Pough, F.H., R.M. Andrews, J.E. Cadle, M.L. Crump, A.H. Savitzky and K.D. Wells. 1998. Herpetology. New Jersey: Prentice-Hall, Inc.

Rohlf, F.J. and J.W. Archie. 1984. A comparison of Fourier methods for the description of wing shape in mosquitoes (Dipter culicidae). Syst. Zool. 33: 302-317.

Rohlf, F.J. and L.F. Marcus. 1993. A revolution in morphometrics. Tree 8(4): 129–132.

Truong, T.N., J.G. Gwang, Y.J. Park and S.H. Lee. 2005. Genetic Diversity of Soybean Pod Shape Based on Elliptic Fourier Descriptors. Korean J. Crop Sci 50 (1)

Yoshioka, Y., H. Iwata, R. Oshawa and S. Ninomiya. 2004. Analysis of Petal Shape Variation of Primula sieboldii by Elliptic Forurier Descriptors and Principal Component Analysis. Annals of Botany 94: 657-664

Juliandi, B. dan F. Ahmad. 2007. Analisis Variasi Bentuk Karapas Cuora amboinensis (Daudin, 1802) dan Cyclemys dentata (Gray, 1831) (Bataguridae; Testudinata) Menggunakan Deskriptor Fourier Eliptikal. Seminar Nasional Herpetologi Institut Pertanian Bogor.

Tracey, S.R., M.L. Jeremy and D. Guy. 2006. Application of Elliptical Fourier Analysis of Otolith Form as a Tool for Stock Identification. Fisheries Research 77: 138-147

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