author={Cliff A. Lemen and Patricia W. Freeman},
  journal={Southwestern Naturalist},
Three trapping grids, 225 m on a side, where established in the desert of southern New Mexico. On grid I all Dipodomys (Heteromyidae, Rodentia) were removed; on grid 2 all Perognathus (Heteromyidae, Rodentia) were removed; and on grid 3 no rodents were removed. All grids were censused at two-week intervals for six weeks. When the larger Dipodomys (40g) were removed, the Perognathus (15g) population increased 2.56-fold (from 27 to 69 individuals) in two weeks. Removal of Perognathus had no… 

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