1997-06-13_REPORT - M1981302 (15)

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%. The meadow in m s documented on City of Boulder capture of 8.0 dow jumping mouse was ty Open Space lands, specifically along South Boulder Creek, 14 individuals on the VanVleet Parcel and nine on the Gebhard Parcel. Average day of capture was 3.3 in the 4-day trapping period at each site. Meadow jumping mice apparently are not abundant on the Colorado Piedmont in Boulder County, comprising just 1.5% of individual small mammals captured 15 field- weeks during the period 3 May through 15 September 1995. Minimal duration of above- ground activity was 140 days, from 16 May to 4 October. In terns of microhabitat, stations of capture of meadow jumping mice did not differ significantly from the mean microhabitat of the transacts or overall sites on which they were captured. That is, seemingly suitable habitat for meadow jumping mice is more widespread on Open Space lands than were the actual captures. Recommendations 1. Conduct and/or encourage intensive studies of population ecology, physiological ecology, habitat selection, and other aspects of the biology of the meadow jumping mouse on the VanVleet-Gebhard-Burke parcels, designed to produce baseline data for management recommendations and monitoring work. 2. Re-survey historical localities of capture on Open Space lands and encourage re- survey of parcels on private lands in Boulder County, to confirm results of this study and that of Ryon (1996). 3. Conduct or encourage research on the impacts of various land management strategies (grazing, weed control, etc.) on the meadow jumping mouse. 4. Conduct or encourage research on influence of suburban-dominated environment and associate variables (increased density of house cats, striped skunks, raccoons, etc.) on populations of meadow jumping mouse. 5. Summary relevant literature on responses of small mammals (including meadow jumping mice) to various land-use practices (grazing, haying, weed control, irrigation, etc.) and other perturbations (fire, flood, etc.) and influences (subsidized predators, etc.). LITERATURE CITED Allen, J. A. 1893. List of mammals collected by Mr. Charles P. Rowley in the San Juan Region of Colorado, New Mexico, and Utah, with descriptions of new species. Bull. Amer. Mus. Nat. Hist., 5:69-84. Armstrong, D. M. 1972. Distribution of mammals in Colorado. Monogr., Univ. Kansas Mus. Nat. Hist., 3:x + 1-415. 16