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Lizards on Islands within Islands: Microhabitat Use, Movement, and Cannibalism in Anolis sagrei (Brown Anole) and Anolis smaragdinus (Bahamas Green Anole)
Nicholas C. Herrmann1,*, Shannan S. Yates1, Jason R. Fredetten1, Molly K. Leavens1, Renata Moretti1, and R. Graham Reynolds2
1Museum of Comparative Zoology and Department of Organismic and Evolutionary Biology, Harvard University, 26 Oxford Street, Cambridge, MA 02138, USA. 2Department of Biology, University of North Carolina Asheville, One University Heights, Asheville, NC 28804, USA. *Corresponding author.
Caribbean Naturalist, No. 50 (2018)
Abstract
Inland lakes on larger Bahamian islands often contain small islands. We surveyed 6 such interior islands on Long Island, Bahamas, to determine whether any of the 4 Anolis lizard species found on the nearby “mainland” were present. Anolis sagrei (Brown Anole), perhaps the most successful overwater disperser and colonizer of all Anolis species, was present on all 6 interior islands. Of the 3 other “mainland” species, only A. smaragdinus (Bahamas Green Anole) was present on interior islands and only on the 2 islands with mature, closed-canopy coppice forest. To investigate how sympatric Brown Anoles and Bahamas Green Anoles use interior-island habitat, we performed a capture–mark–recapture study on 1 island. We found population-level interspecific perch height partitioning typical of other areas where these species co-occur, yet within both species there is a wide range of intra-individual variation in perch height and diameter. We also report male-biased, within-island dispersal in Brown Anoles over a 5-month period and the first recorded case of cannibalism in the Bahamas Green Anole.
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