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length (PL) are used instead). The SVL differs depending on whether the animal is struggling or relaxed (if alive), or various other factors if it is a preserved specimen. For fossils, an
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Because tails are often missing or absent, especially in juveniles, SVL is seen as more invariant than total length. Even in the case of crocodiles, tail tips may be missing.
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Allen E. Greer; Lisa
Wadsworth (September 2003). "Body Shape in Skinks: The Relationship between Relative Hind Limb Length and Relative Snout–Vent Length".
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Various devices are used to position the animal while the measurement is being taken, such as a snake tube, "Mander Masher", or a "Salamander Stick".
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Jessica L. Deichmann; William E. Duellman; G. Bruce
Williamson (June 2008). "Predicting Biomass from Snout–Vent Length in New World Frogs".
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Richard W. Blob (August 1998). "Evaluation of Vent
Position from Lizard Skeletons for Estimation of Snout–Vent Length and Body Mass".
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Kupfer, A. "Sexual size dimorphism in amphibians: an overview". In
Fairbairn, D. J.; Blanckenhorn, W. U.; Székely, T. (eds.).
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123:"Review of morphometric measurements used in anuran species descriptions and recommendations for a standardized approach"
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such as precaudal length must be used. When combined with weight and body condition, SVL can help deduce age and sex.
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Walston, L. J.; Mullin, S. J. (2005). "Evaluation of a new method for measuring salamanders".
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Wise, S. E.; Buchanan, S. W. (1992). "An efficient method for measuring salamanders".
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Watters, Jessa L.; Cummings, Sean T.; Flanagan, Rachel L.; Siler, Cameron D. (2016).
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52:(vent). It is the most common measurement taken in herpetology, being used for all
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Sex, Size, and Gender Roles: Evolutionary
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Herpetology: An
Introductory Biology of Amphibians and Reptiles
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A female frog being measured for snout vent length.
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16:Morphometric measurement used in herpetology
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219:The management of crocodiles in captivity
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170:Vitt, Laurie J.; Zug, George R. (2012).
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48:to the most posterior opening of the
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92:The measurements may be taken with
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470:Standards and measurement stubs
176:. Academic Press. p. 34.
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140:10.11646/zootaxa.4072.4.6
212:Bolton, Melvin (1989).
409:-related article is a
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281:Journal of Herpetology
74:osteological correlate
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256:Herpetological Review
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460:Herpetology
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42:herpetology
454:Categories
262:: 290–292.
107:References
80:Advantages
54:amphibians
403:standards
149:1175-5334
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302:40060507
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70:plastral
66:carapace
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127:Zootaxa
88:Methods
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222:. FAO.
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374:S2CID
366:JSTOR
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306:S2CID
298:JSTOR
46:snout
411:stub
325:1998
178:ISBN
153:PMID
145:ISSN
131:4072
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34:SVL
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
