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Section 779,20 (c) Continued. <br />• vegetational cover. Each species trapped was identified and <br />weighed. The reproductive status was also determined. The location <br />of the traplines are shown on the Twentymile Park Mammalian Obser- <br />vations (Map 17). <br />Additional studies on small mammals were conducted by wildlife <br />biologists from Ecology Consultants during the last week in May, <br />1979, within all four major vegetation types occurring in the <br />Eckman Park area. These vegetation types included: (1) wet <br />meadbw (riparian), (2) sagebrush, (3) aspen, and (4) mountain <br />shrub. Sampling occurred along a trapline within each vegetation <br />type shown on Twenty-mile Park Mammalian Observations (Map 17). <br />Each line consisted of 50 trap stations spaced 15 meters apart. A <br />snap trap was positioned at each station and baited with a mixture <br />of peanut butter and oats. Traps were checked three times during <br />the early morning hours. A rain delay caused a break in the trap <br />• check schedule. For this reason, two extra nights of operation <br />were scheduled for unsprung traps (i.e., traps were checked May 30th <br />and 31st: allowed to operate over the weekend and then checked <br />again June 4th). <br />At the time of trap checks, data concerning species, sex, age <br />class, reproductive status, general physical condition, and capture <br />location were recorded on standard data forms. As a reference for <br />identification, Armstrong (1972) provided the most current published <br />literature on mammalian distribution in Colorado. <br />Relative abundance for each habitat was calculated for small <br />mammal species according to the following formula: <br />Percent Relative Abundance = No. individuals of species A x 100 <br />individuals of all species <br />• 779-136 <br />