MODES OF ECTOPARASITE REINFESTATIONS OF DEER MICE (Peromyscus maniculatus)

Abstract

Modes of ectoparasite reinfestations were studied on ectoparasite-free deer mice (P. maniculatus) returned to their natural habitat on the Tule Lake National Wildlife Refuge, Siskiyou County, California, USA, during the summer of 1977. The age of the host made no significant difference in the mode of reinfestation of lice, fleas or mites. Flea reinfestation rates were related to the sex of the host, requiring 4 and 2 days, respectively, to reach control levels on male and female hosts. Mite populations reached the control level within 1 day, regardless of the sex of the host. No statistically significant louse reinfestations were noted within 8 days after the hosts were released. The percent of the host population reinfested with each ectoparasite followed the same patterns of reinfestation as the numbers of each parasite per host. The mode of ectoparasite reinfestation is probably a function of the behavior of the host relative to the lifestyle of the ectoparasite species.