+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Statistical analyses of pattern variation in the copper-bellied (Nerodia erythrogaster neglecta) and yellow-bellied (N. e. flavigaster) watersnake subspecies

Statistical analyses of pattern variation in the copper-bellied (Nerodia erythrogaster neglecta) and yellow-bellied (N. e. flavigaster) watersnake subspecies

American Midland Naturalist 159(1): 30-41

We conducted a statistical evaluation of the pattern characteristics used to distinguish juvenile and adult copper-bellied (Nerodia erythrogaster neglecta) and yellow-bellied (Nerodia erythrogaster flavigaster) watersnakes. A total of 405 preserved museum specimens (juvenile = 242; adult = 163) was grouped as either neglecta, flavigaster or intermediate based on previous evaluations of the geographical variations of pattern seen in these taxa. Depending on the nature of the character, its state was either scored across its phenotypic range or measured using digital image analysis techniques. The juvenile neglecta and flavigaster phenotypes are consistent with their historical descriptions and the intermediate phenotype is nearly identical to neglecta. The amount and intensity of the dorsal pigment invasion of the ventral scales was the most informative adult charter. Digital image analyses of these characters are consistent with their historical descriptions for the neglecta and flavigaster phenotypes. For the intermediate phenotype, the amount. of invading pigment was consistent with the neglecta phenotype, whereas the intensity was consistent with the flavigaster phenotype. The results of this research may provide a more objective means of identifying populations of the Federally threatened N. e. neglecta.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 021795486

Download citation: RISBibTeXText

DOI: 10.1674/0003-0031(2008)159[30:saopvi]2.0.co;2

Related references

Fire and Flood: Why Are South-Central Florida Seasonal Ponds Treeless?. American Midland Naturalist 159(1): 8-20, 2008

Nerodia erythrogaster (plain-bellied watersnake). Herpetological Review 33(4): 325, 2002

Nerodia erythrogaster flavigaster (Yellow-bellied Watersnake). Anti-predatory behavior. Herpetological Review 38(1): 91, 2007

Nero Siciliano pig: effect of the diet on meat quality. Italian Journal of Animal Science 6(Suppl. 1): 679, 2007

Nerodia erythrogaster flavigaster (yellow-bellied watersnake): diet. 2007

Nerodia erythrogaster neglecta (Copper-bellied watersnake). Foraging behavior. 2005

The Invasion of Procambarus clarkii Decapoda Cambaridae into Maryland Streams following Its Introduction in Outdoor Aquaculture Ponds. Northeastern Naturalist 16(4): 655-663, 2009

Observations on the yearly life cycle of Astacus astacus in a small lake in Sweden. Freshwater Crayfish 12: 413-429, 1999

Nerodia erythrogaster transversa blotched watersnake endoparasites. Herpetological Review 43(1): 148-149, 2012

Nerodia erythrogaster erythrogaster (red-bellied watersnake). Catesbeiana. Fall; 222: 52-53, 2002

Thrombin-variable region 1 (VR1). Evidence for the dominant contribution of VR1 of serine proteases to their interaction with plasminogen activator inhibitor 1. The Journal of Biological Chemistry 268: 9-82, 1993

Nerodia erythrogaster flavigaster (yellowbelly water snake). Herpetological Review 26(4): 210, 1995

Nerodia erythrogaster erythrogaster red-bellied watersnake. Herpetological Review 39(2): 242, 2008

Nerocila orbigyni, ein proterandrischer Hermaphrodit und parasitischer Isopode auf Tilapia galilaea. Unknown, 1962

Nerodia erythrogaster plain-bellied watersnake. Herpetological Review 33(4): 325, 2002