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H-6 • tracts area. These posts were examined for three days in September 1980. A track-count survey rouse was also established along 33.3 km of roads in the lease. Because ~ the infrequent snowfall during the 1980-1981 winter, tracks were counted only four times from January to March. H.2.?. Small Mammals Data were collected on both rodents and rabbits during the studies conducted on the sodium lease tracts between 1980-1981. Rodents Studies were conducted on small mammal populations during the 1980-1981 studies. The purpose of these studies was to determine species com- position within each habitat type, the relative abundance and densities • of each species, and habitat associations. The population data were derived from 10 - 2.2 ha (100 trap) Live trapping grids in six habi- tats. The habitat types that were sampled included sagebrush, pinyon- juniper, greasewood.-sage bottom, wash (found within the greasewood-sage bottom), and bald types. Traps were set for three days each month from August 1980 through July 1981; data were analyzed for approximately 4,200 captures. The following parameters were evaluated: density (minimum number alive per hectare), number captured per grid, survival and recruitment rates, biomass (standing crop and amount lost to predation), various reproductive parameters, habitat associations by general habitat type and by micro-habitat (multivariate analyses). bits and Hares The purpose of this study was to determine the species composition within each habitat type, the relative densities and abundance of each rabbit or hare species, and the habitat associations of each species. • Rabbits were samplead by driving a survey route in the sodium lease area THIS DOCUMENT CONTAINS TRADE SECRETS AND PRIVILEGED, CONFIDENTIAL AND f~ 'y~p/~ P NOFO RMATION.OPU^RSUANT TO LAW,THOSE PORTIONS MARKED PCON FIDENTIAL'AN ~~~IS ,r ~if ~ ~ MAY NOT BE DISCL~DSED, COPIED OR MADE AVAILABLE FOR PUBLIC INSPECTION.