Quantification of Competition among Coexisting Heteromyids in the Southwest

Quantification of Competition among Coexisting Heteromyids in the Southwest

Three trapping grids, 225 m on a side, where established in the desert of southern New Mexico. On grid 1 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 in...

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Veröffentlicht in:The Southwestern naturalist 1983-02, Vol.28 (1), p.41-46
Hauptverfasser: Lemen, Cliff, Freeman, Patricia Waring
Format: Artikel
Sprache:eng
Schlagworte:
Animal ecology
Animal traps
Censuses
Deserts
Ecological competition
Interspecific competition
Quantification
Rodents
Species
Synecology
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Beschreibung
Zusammenfassung:Three trapping grids, 225 m on a side, where established in the desert of southern New Mexico. On grid 1 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 effect on numbers of Dipodomys. Our data allow us to estimate the magnitude of the competition between Dipodomys and Perognathus.
ISSN:0038-4909
DOI:10.2307/3670590