Neuse River waterdog
© 2022 Nathan Vaughan (1 of 1)
Distribution and Habitat
Country distribution from AmphibiaWeb's database: United States
U.S. state distribution from AmphibiaWeb's database: North Carolina
Life History, Abundance, Activity, and Special Behaviors
Relation to Humans
This species was featured as News of the Week on 8 October 2018:
Amphibians have some of the largest and smallest known genomes of all tetrapods. Liedtke et al. (2018) shows that, although genome size is incredibly variable across amphibians, the majority of amphibian genome size evolution has occurred gradually over time. The best supported evolution model for genome size shows a single jump in size occurring as genome size increased in the ancestor of salamanders. Salamanders have the largest amphibian genomes, with the Neuse River Waterdog (Necturus lewisi) holding the title for largest tetrapod genome size (140 pg)! Furthermore, they found no support for the hypothesis that amphibian genome size evolves in association with changes in development (shifts such as changes from larval to direct development) but did see an association between genome size and length of development and climate (temperature and humidity). Despite amphibians having the widest range of tetrapod genome sizes, the evolution of genome size in this group can be largely explained by random, gradual change over time and appears to have little to do with the drastic changes in development that have repeatedly evolved within amphibians (Written by Molly Womack).
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Guttman, S. I., Weigt, L. A., Moler, P. E., Ashton, R. E., Jr., Mansell, B. W. and Peavy, J. (1990). ''An electrophoretic analysis of Necturus form the southeastern United States.'' Journal of Herpetology, 24(2), 163-175.
Neill, W. T. (1963). "Notes on the Alabama waterdog, Necturus alabamensis Viosca." Herpetologica, 19, 166-174.
Petranka, J. W. (1998). Salamanders of the United States and Canada. Smithsonian Institution Press, Washington D.C. and London.
Originally submitted by: Meredith J. Mahoney (first posted 2000-07-26)
Edited by: M. J. Mahoney, Ann T. Chang (2019-03-06)
Species Account Citation: AmphibiaWeb 2019 Necturus lewisi: Neuse River waterdog <https://amphibiaweb.org/species/4225> University of California, Berkeley, CA, USA. Accessed Aug 13, 2022.
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Citation: AmphibiaWeb. 2022. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 13 Aug 2022.
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