Literaturdatenbank

WIKINDX Resources

Ewert, M. A., Pritchard, P. C. H., & Wallace, G. E. (2006). Graptemys barbouri - barbour's map turtle. In P. A. Meylan (Ed.), Biology and Conservation of Florida Turtles Vol. 3, (pp. 260–272). 
Added by: Sarina Wunderlich (06 Jul 2014 16:10:43 UTC)
Resource type: Book Article
BibTeX citation key: Ewert2006a
View all bibliographic details
Categories: General
Keywords: Chelydra serpentina, Chelydridae, Habitat - habitat, Macrochelys temminckii, Nordamerika - North America, Schildkröten - turtles + tortoises
Creators: Ewert, Meylan, Pritchard, Wallace
Collection: Biology and Conservation of Florida Turtles
Views: 5/675
Views index: 19%
Popularity index: 4.75%
Abstract     
Barbour’s map turtle, Graptemys barbouri, is one of two map turtles found in the panhandle of Florida. Adult females are larger than any other map turtles and have extremely broad heads; adult males are much smaller, with narrow heads. This species was first discovered in the Chipola River, at which time it was the first map turtle recorded from Florida. The distribution is now known to include parts of several river systems, including the Apalachicola and Chattahoochee at least as far north as Stewart County, Georgia, the Flint River north to Meriwether County, Georgia, and the Choctawhatchee and Pea River systems as far as Geneva County, Alabama. It appears to be introduced into the Ochlockonee River and possibly the Wacissa River. The Florida distribution is important to this species as a large portion of its range lies within the state. Favored habitat includes sections of free-flowing rivers with limestone outcrops; this environment supports good populations of gastropod mollusks, important in the diet of the adult females. However, use of silty channels is also widespread. Females appear to require many years to mature, perhaps as many as 14 years, and reach maximum size at around 24 years, whereas males mature in just 3–4 years. They have a prolonged nesting season (late April to early August) with relatively low clutch size (usually 7-10 elongate, soft-shelled eggs), but they may lay several clutches of eggs. Populations appear mostly to be fairly stable. In the Choctawhatchee River system there is suggestion of introgressive hybridization with G. ernsti, which could locally deplete G. barbouri as a pure form. Genetic evaluation of the Choctawhatchee map turtles is needed. Water flow in the Apalachicola River system is controlled or limited by dams, and this may have deleterious effects upon the habitat and populations of G. barbouri in this system.
Added by: Sarina Wunderlich  
wikindx 4.2.2 ©2014 | Total resources: 14930 | Database queries: 57 | Script execution: 0.2739 secs | Style: American Psychological Association (APA) | Bibliography: WIKINDX Master Bibliography