Table 1. Population Estimates of Rodents Spring of 1973, 1974, and 1975. in Two Study Areas of NTS in (Estimates are in number/hectare.) Area 5 Area 13 Species 1973 1975 1973 1974 1975 Ammospermophtlus Leucurus 0.05 0.73 0,22 0.71 0.26 Dipodomys merrtamt -- 1.16 0,35 ~+ 0.26 Dipodomys mtcrops 0.09 1.95 1.70 0.69 -~ =< -- Mterodipodops megacephalus 0.15 Onychomys torrtdus 0.05 0.05 0.05 -- -- Perognathus Longimembrts 0.19 0.04 1.12 1.62 -- 0.09 -- _- -- 0.37 -- 7 4 2 3.39 0.52 Peromy seus eremtcus Peromyscus manteulatus Total Number of Species Total Number of Animals/Hectare 4 5 0.38 3.439 57 3.68