Literaturdatenbank
Literaturdatenbank |
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Enge, K. M., & Wallace, G. E. (2008). Basking survey of map turtles (graptemys) in the chocawhatchee and ochlockonee rivers, florida and alabama. Florida Scientist, 71(4), 310–322.
Added by: Admin (22 Feb 2009 11:56:12 UTC) |
| Resource type: Journal Article BibTeX citation key: Enge2008 View all bibliographic details  |
Categories: General Keywords: Emydidae, Graptemys, Graptemys barbouri, Habitat = habitat, Nordamerika = North America, Pseudemys, Pseudemys concinna, Schildkröten = turtles + tortoises, Trachemys, Trachemys scripta Creators: Enge, Wallace Collection: Florida Scientist |
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| Abstract |
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Basking surveys for Barbour's map turtle (Graptemys barbouri) in 1999–2001 first documented its occurrence in Florida in the Choctawhatchee River and confirmed its presence in the Ochlockonee River. A total of 294 Graptemys was observed along 145.2 km of the Choctawhatchee River, with highest densities (5–7/km) occurring in the upper reaches north of Caryville, Holmes County, Florida; no map turtles were observed in the lower reaches south of Camel Bluff, Walton County, Florida. In the Choctawhatchee River, 98.0% of Graptemys were observed from ca. 5 km south of Interstate 10 in Holmes County, where a limestone bottom begins, upstream into Geneva County, Alabama. We classified 41.5% of observed Graptemys as juveniles and 75.9% of adults as males. The proportion of map turtles observed basking during 30-min intervals from 1000 to 1429 hr did not differ significantly from the amount of survey effort. Graptemys barbouri was uncommon in the Ochlockonee River, a blackwater river that probably provides suboptimal habitat. Only four G. barbouri were observed along 162.0 km of the Ochlockonee River in the same two sections where three juveniles were previously captured. Other reptile species observed frequently during the surveys were Pseudemys concinna, P. floridana, Trachemys scripta, Apalone spp., and Alligator mississippiensis.
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