Table 2: Results of the best-fit spatial multiple linear regressions relating small mammal captures to average red imported fire ant (RIFA) foraging activity and five microscale habitat characteristics. Asterisks indicate significant explanatory variable in the best fitting model. We report AIC weight and % difference in AIC weights between the best-fit model (reported) and its most likely alternative model.

SpeciesSeason Variables in the best-fit modelAIC weight (% difference)R 2

PIGMY MOUSE
(Baiomys taylori)
fall 1991(−) % ground*, (+) litter depth24% (10%)0.14
spring 1992(−) % litter, (+) % woody, (−) woody ht*32% (6%)0.22
fall 1992(+) % grass*53% (24%)0.12
WHITE-FOOTED MOUSE
(Peromyscus leucopus)
fall 1991(+) woody ht*48% (16%)0.43
spring 1992(+) % woody*56% (33%)0.27
fall 1992(−) % litter, (−) litter depth*44% (17%)0.19
FULVOUS HARVEST MOUSE
(Reithrodontomys fulvescens)
fall 1991(−) % litter*, (+) % woody ht*43% (20%)0.19
spring 1992(+) % litter45% (18%)0.05
fall 1992(+) % litter57% (31%)0.07
HISPID COTTON RAT
(Sigmodon hispidus)
fall 1991(−) RIFA, (+) % woody42% (14%)0.11
spring 1992(+) % woody56% (31%)0.06
fall 1992(+) woody ht53% (27%)0.01