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Species assessment for Columbia spotted frog (Rana luteiventris) in Wyoming

Publication Information

Author(s):
Douglas A Keinath
Debra A Patla
Publication Date: 2005-01
Tags: BLM, WLCI Agency Report, UCRB, WLCI

 

Four populations of Columbia spotted frog (Rana luteiventris) are currently recognized, 
including three disjunct, southern populations and a main population extending from northwest 
Wyoming through western Canada. The main (or northern) population includes Wyoming.  It 
has no federal status as endangered or threatened and is generally considered to be secure, 
although some local declines have been documented.  Most occupied habitat for the Columbia 
spotted frog occurs on lands managed by the National Forest Service (Regions 2 and 4) and the 
National Park Service (Yellowstone and Grand Teton national parks ).  The Bureau of Land 
Management (BLM) may have potential habitat in the Green River Basin and higher elevation 
parcels near forest boundaries (Fig. 8 and 9), but the extent of this is largely unknown because  
most potentially suitable BLM land has not been surveyed for spotted frogs. 
Historical data are too scarce to determine if declines have occurred in many areas where 
spotted frogs currently occur in Wyoming.  Some populations in the state appear to be 
vulnerable.  Habitat loss, degradation, and fragmentation are major threats to spotted frogs on 
multiple-use lands in Wyoming.  Livestock grazing, water manipulation, road construction, and 
the introduction of sport fish are identified as the activities most likely to affect habitat.  
Spotted frog populations also may be directly affected, in terms of survival and reproduction, 
by elevated mortality rates from a variety of human and management activities (e.g., roadkill, 
trampling), predation by fish, and exposure to toxic chemicals.  Drought is also a threat to frogs 
and their habitat, and its effects may be exacerbated by management activities and land uses.  

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