8063

• UCREFRP Catalog Number: 8063
• Author: Colorado River Fish and Wildlife Council.
• Title: Minutes, Colorado River Fish and Wildlife Council - April 22-23, 1998.
• USFW Year: 1998.
• USFW - Doc Type: Las Vegas, Nevada.
• Copyright Material: NO

Nevada
Anecdotal, literature, field notes, museum records; state heritage data base for some species.
2. Updated distribution and status assessment, habitat. requirements, age and population structure,
genetics.
3. Some populations are presumed stable, some isolated populations may be vulnerable and
possibly declining.
4. Occurrence records and taxonomical identification for this species are unclear. The presumed
R. yavapaiensis population in adjacent Littlefield, AZ is now thought to be R. onca; additional
genetic and taxonomic evaluation is needed to assess the Rana complex in the Virgin River
basin and determine if Nevada occurrence of R. yavapaiensis is valid. Nearest recent confirmed
R. yavapaiensis records are for Grand Canyon, AZ.
Known extant NV populations only occur at isolated springs on Lake Mead NRA. Further
assessment of sites below Hoover Dam and in Virgin River corridor is needed to define status
and distribution of R. onca.
6. NPS is actively managing and implementing conservation actions for Lake Mead NRA sites.
Evaluation of putative R. onca Black Canyon leopard frog populations below Hoover Dam is
funded and in progress.
Existing management actions for extant Lake Mead populations are probably sufficient for short-
term needs, but conservation needs for Black Canyon populations have not been addressed.
Further evaluation of the leopard frog complex in the larger Virgin River/Lake Mead drainage is
needed to determine the extent and validity of the R. onca taxonomic group.
New Mexico
Recently published book Amphibians and Reptiles of New Mexico: all records based on
museum specimens.
2. Numerous agency reports, all <1985; museum records; Recently published book Amphibians
and Reptiles of New Mexico.
3. Distribution, threats, interaction with B. woodhouseii.
4. Distribution, reproduction and habitat information, etc.
Utah
UDWR has developed a data base for all known and available museum records, grey literature,
and [scientific collection] annual reports. Incidental reports and site records should be
incorporated by 1999.
2. UDWR is in the process of developing a statewide inventory and monitoring plan for
amphibians.
3. Most information is pre-1950, spotty, and/or reflects chance observations.
4. Year-round habitat requirements for all life stages, food requirements, age and population
structure, and genetics.

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