The Big Bend slider, Trachemys gaigeae
), is a medium-sized freshwater turtle (carapace length to 308 mm) that is limited to riverine areas of the desert southwestern United States and northern Mexico. Two allopatric subspecies are currently recognized, T. g. gaigeae and T. g. hartwegi, which might represent distinct species. Degradation and fragmentation of riverine habitat is likely the most significant threat to T. gaigeae
in both the United States and Mexico. Overcollecting for the pet trade or as food and hybridization with introduced Trachemys scripta
are also of concern, although more information is needed. Commercial collection is prohibited in the United States but otherwise this slider receives little protection, except where it occurs on public lands. The species uses reservoirs and artificial ponds in New Mexico, suggesting some adaptability to human-modified environments. The status and ecology of this species in the United States has been little studied until recently and even less is known about populations in Mexico.
Stuart, J.N. and Ward, J.P. 2009. Trachemys gaigeae (Hartweg 1939) – Big Bend slider, Mexican Plateau slider, jicotea de la Meseta Mexicana. In: Rhodin, A.G.J., Pritchard, P.C.H., van Dijk, P.P., Saumure, R.A., Buhlmann, K.A., Iverson, J.B., and Mittermeier, R.A. (Eds.). Conservation Biology of Freshwater Turtles and Tortoises: A Compilation Project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group. Chelonian Research Monographs No. 5, pp. 032.1-032.12, doi:10.3854/crm.5.032.gaigeae.v1.2009, http://www.iucn-tftsg.org/cbftt