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Volume II. Virgin Islands National Park Herpetofaunal Inventories of the National Parks of South Florida and the Caribbean: Volume II. Virgin Islands National Park By Kenneth G. Rice1, J. Hardin Waddle2, Marquette E. Crockett2, Raymond R. Carthy2, and H. Franklin Percival2 1. U.S. Geological Survey, Florida Integrated Science Center 2. U.S. Geological Survey, Florida Cooperative Fish and Wildlife Research Unit Report Series 2005–1301 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior Gale A. Norton, Secretary U.S. Geological Survey Charles G. Groat, Director U.S. Geological Survey, Reston, Virginia Revised and reprinted: 2005 For product and ordering information: World Wide Web: http://www.usgs.gov/pubprod Telephone: 1-888-ASK-USGS For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment: World Wide Web: http://www.usgs.gov Telephone: 1-888-ASK-USGS Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted material contained within this report. For more information about this report, contact: Dr. Kenneth G. Rice, U.S. Geological Survey, Florida Integrated Science Center UF­ FLREC, 3205 College Av., Ft. Lauderdale, FL 33314, USA E-mail: [email protected] Phone: 954-577-6305 Fax: 954-577-6347 J. Hardin Waddle, U.S. Geological Survey, Florida Cooperative Fish and Wildlife Research Unit Box 110485, Building 810, University of Florida, Gainesville, FL 32611, USA E-mail: [email protected] Phone: 352-846-0638 Fax: 352-846-0841 Marquette E. Crockett, U.S. Geological Survey, Florida Cooperative Fish and Wildlife Research Unit, Everglades N.P. Research Center, 40001 S.R. 9336, Homestead, FL 33034, USA E-mail: [email protected] Phone: 305-242-7809 Dr. Raymond R. Carthy, U.S. Geological Survey, Florida Cooperative Fish and Wildlife Research Unit Box 110485, Building 810, University of Florida, Gainesville, FL 32611, USA E-mail: [email protected] Phone: 352-392-1861 Fax: 352-846-0841 ii Contents Abstract............................................................................................................................................... 1 Introduction ........................................................................................................................................ 2 Survey Methods................................................................................................................................. 3 Site Selection ................................................................................................................................. 3 Visual Encounter Surveys ............................................................................................................ 3 Vocalization Surveys..................................................................................................................... 4 Data Analysis.................................................................................................................................. 4 Density Estimation ..................................................................................................................... 4 Double Observer ........................................................................................................................ 4 Proportion of Area Occupied (PAO) ....................................................................................... 5 Results ................................................................................................................................................. 5 Density Estimation ......................................................................................................................... 5 Double Observer ............................................................................................................................ 5 Proportion of Area Occupied (PAO) ........................................................................................... 6 Species Accounts - Anurans....................................................................................................... 7 Bufo marinus ................................................................................................................................. 7 Bufo lemur ..................................................................................................................................... 7 Eleutherodactylus antilliensis....................................................................................................... 8 Eleutherodactylus cochranae........................................................................................................ 8 Eleutherodactylus coqui................................................................................................................ 8 Eleutherodactylus lentus............................................................................................................... 8 Leptodactylus albilabris ................................................................................................................ 8 Osteopilus septentrionalis ............................................................................................................ 9 Reptiles ............................................................................................................................................ 9 Anolis cristatellus ......................................................................................................................... 9 Anolis pulchellus........................................................................................................................... 9 Anolis stratulus ........................................................................................................................... 10 Iguana iguana.............................................................................................................................. 10 Hemidactylus mabouia................................................................................................................ 10 Sphaerodactylus macrolepsis..................................................................................................... 10 Ameiva exsul............................................................................................................................... 10 Amphisbaena fenestrata ............................................................................................................ 11 Arrhyton exiguum exiguum ......................................................................................................... 11 Typhlops richardi......................................................................................................................... 11 Geochelone carbonaria ............................................................................................................... 11 Summary and Conclusions ............................................................................................................ 11 Acknowledgments........................................................................................................................... 13 References Cited ............................................................................................................................. 13 Figures ............................................................................................................................................... 15 Tables ................................................................................................................................................ 15 iii List of Tables Table 1. List of trails and habitat types..........................................................................................16 Table 2. Results of DISTANCE analysis for E. antilliensis...........................................................17 Table 3. Results of double observer analysis for Eleutherodactylus antilliensis .......................18 Table 4. Results of PAO analysis for E. antilliensis ......................................................................19 Table 5. Results of PAO analysis for E. cochranae .......................................................................20 Table 6. Results of PAO analysis for L. albilabris .........................................................................21 Table 7. Numbers of amphibians found during VES by substrate ...........................................22 Table 8. Numbers of amphibians found during VES by habitat................................................23 Table 9. Snout-vent length of amphibians found during VES....................................................24 List of Figures Figure 1. General locator map for U.S. Virgin Islands.................................................................26 Figure 2. Location of Virgin Islands National Park on St. John, U.S. Virgin Islands.............27 Figure 3. Major vegetation types found on St. John. .................................................................28 Figure 4. Location of transects used for amphibian surveys of VINP.....................................29 Figure 5. Locations of survey transects where E. antilliensis were observed. ......................30 Figure 6. Locations where voucher specimens of E. antilliensis
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