Dead Juveniles

I created this new subproject for the Pacific Newt roadkill study at Lexington Reservoir to track the dead juveniles, since they have a disproportionate impact on population size.

Volunteers, please enter the word "Juvenile" in the Notes or Tags field (or both) so that it's easy to search for and find these observations. As of this date, it's not possible to search for observations based on Annotations or Observation Fields.

How to Differentiate Juvenile from Adult Newts:

According to the Amphibiaweb accounts, the smallest recorded reproductive adult was 5 cm/2 in in snout to vent length (SVL), though there is variation and average adult size is 6.9-8.7 cm/2.7-3.4 in (SVL). So there is some fuzzy area, but this provides a conservative threshold.

If we estimate the tail length is about the same as the SVL, then total length of smallest reproductive adult recorded is about 10 cm/4 in.

• The terrestrial juvenile phase is called an eft.

References:
• "Neglected juveniles: a call for integrating all amphibian life stages in assessments of mitigation success (and how to do it)"
https://www.sciencedirect.com/science/article/abs/pii/S0006320718316306

• AmphibiaWeb: Taricha torosa
https://amphibiaweb.org/cgi/amphib_query?where-genus=Taricha&where-species=torosa&account=lannoo

• https://amphibiaweb.org/cgi/amphib_query?where-genus=Taricha&where-species=torosa&account=amphibiaweb

Publicado el 25 de julio de 2020 por truthseqr