Decline and Reinvasion of Deer Mouse Populations After Baiting Douglas-fir Clearcuts with 6-Aminonicotinamide

After toxicity and bait acceptance studies, 6-aminonicotinamide was evaluated for control of deer mice (Peromyscus maniculatus). Oat groats treated with 1.0 percent 6-aminonicotinamide by weight were broadcast at ½ pound per acre on three 40-acre clearcuttings in Douglas-fir (Pseudotsuga menziesii) timber types. Live-trapping one week after baiting indicated a 100 percent reduction of resident deer mouse populations, but within one month reinvasion had brought enough population to justify rebaiting according to the criterion of five mice per 100 trap nights.