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<br /> <br />srmzt, ru;rrmTs <br />S1ne11 mammals wire sampled during Octoter, 1979 by 200`m live--trapping <br />transects at the Nucla :tine study area. Ccx*~,~uter printrouts of the <br />Field and analyzed data are provided in App~:dix 8, Part 1 for each of the <br />three vegetation types sanpled: vnland sagebrush, grassland pasture , <br />and riparian. Nw-nxis of individuals of each species captured, relative <br />abundance indices {nian'~er of individuals captured per 100 trap nights), sex <br />and age class ratios, and Shannon-t.'einer species diversity indices are pro- <br />vided on the printrouts. F~lative abundance indices for each species and <br />Sharu~on Weiner diversity indices are su.-crarized for each vegetation type in <br />Table 2. Nacroi'iabitat a8finities as de.-~oted by G'u-square values are provided <br />for each species captured in Appendix B, Part 1. <br />-Zlo major topics are considered in the follovring discussion of small manual <br />- trapping results. First, the relative im~rtance of each habitat type to <br />small mammal populations in the study area is discussed. Importance is <br />defined by three parame~~.ers: s~cies diversity, species oong~osition, and <br />- tntal small mammal abundance. Secondly, the distribution, abundance and popu- <br />lation structure (sex ratios) are described for each species captured. <br />9na11 manmal habitats. The riparian habitat provides the best habitat for <br />small mamcals in the ti'ucla study area. Of t*~e four species capturx~ ~'uring <br />small manrrtal investigations, western harvest mouse Obi+hrodontomys m~alotrs) , <br />deer mouse iPercnyscus maniculatus), meadow wle 4Niczntus pennsylvanicus), <br />arxi Muse Crouse (MILS muscular) , all four avere represented in samples <br />collected in the riparian type. Accordingly, the Shannon-Weiner species . <br />diversity index for riparian was the highest recorded at 1.28. Riparian vege- <br />tation also evidenced t`ie largest population o£ small mam`als (8,8 individuals/ <br />100 trap nights). The meadow tole was the frost abundant species and accounted <br />for over 438 of the small ma~TCrals captured.. The Muse mouse {2.5 individuals/ <br />100 trap nights), western harvest rrouse (1.3~individuals/100 trap nights), <br />and deer mouse {1.3 individuals/100 trap nights) follcn~d in abundance. A11 <br />species captured in riparian, except t'ie deer arouse, s;-.nwed an affinity for <br />_Z7_ <br /> <br />,tuN s s tioea <br />(Revised July 2006) Attachment 2.04.11-1-34 <br />