Tuesday, December 18, 2012

[Herpetology • 2012] Niche segregation in microhabitat use of three sympatric Cyrtodactylus; Cyrtodactylus phongnhakebangensis, C. cryptus & C. roesleri in the Phong Nha-Ke Bang National Park, Central Vietnam


three sympatric Cyrtodactylus; Cyrtodactylus phongnhakebangensis, C. cryptus & C. roesleri in their microhabitats at the Phong Nha-Ke Bang National Park, Central Vietnam

Abstract
We collected field data to characterize and segregate the microhabitat use of the three sympatric bent-toed geckos Cyrtodactylus phongnhakebangensis, C. cryptus, and C. roesleri.  These species were recently discovered to occur in one of the last remaining karstic rainforest formations in Vietnam, the Phong Nha-Ke Bang National Park of Central Vietnam. Between July and September 2010, we found 126 individual geckos in six independent areas by visual encounter surveys.  We assessed habitat data in order to enable a microsite comparison of the different species.  We found syntopic occupation of one study site by  C. phongnhakebangensis  and  Croesleri, and sympatric occurrence with  C. cryptus.  Our study shows niche segregation in microsite use for C. cryptus and niche overlap for C. roesleri with C. phongnhakebangensis. It may be inferred that the syntopic sibling species did not develop microhabitat partitioning, while the sympatric gecko adjusted to occupy different types of habitat. 

Key Words: Bent-toed Gecko; Gekkonidae; habitat preferences; karst forest; Squamata.




Loos, J., Dang, N. K.., von Wehrden, H. & Ziegler, T. 2012. Niche segregation in microhabitat use of three sympatric Cyrtodactylus in the Phong Nha-Ke Bang National Park, Central Vietnam. Herpetological Conservation and Biology. 7(1):101−108. http://herpconbio.org/Volume_7/Issue_1/Loos_etal_2012.pdf

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