TY - JOUR T1 - Reproductive strategies of ectoparasites on small mammals JF - Canadian Journal of Zoology Y1 - 1988 DO - 10.1139/z88-116 A1 - Lars Lundqvist SP - 774 EP - 781 AB -
The effects of disulfiram, benzyl benzoate and DDT, all components of a common preparation (Tenutex) for the control of the head louse, were tested on louse eggs. A significant higher mortality of eggs was evident after treatment with (i) disulfiram, (ii) benzyl benzoate, (iii) these two substances mixed, and (iv) Tenutex. DDT in this concentration had no effect on the survival of the eggs. Long-time exposure to Tenutex and Tenutex without DDT significantly lowered the hatching frequency of eggs. Almost no hatching occurred after exposure for 24 hours. The survival of larvae hatched from eggs treated with Tenutex was lower than for those treated with Tenutex without DDT. DDT seemed to have an effect primarily on the survival of larvae. Newly hatched larvae were more sensitive to the two Tenutex preparations than older larvae.
CY - SWEDEN VL - 64 SN - 0001-5555 IS - 4 N1 - LR: 20041117; JID: 0370310; 0 (Benzoates); 0 (Emulsions); 120-51-4 (benzyl benzoate); 50-29-3 (DDT); 97-77-8 (Disulfiram); ppublish ER - TY - JOUR T1 - Dispersal in patchy environments: effect on the prevalence of small mammal ectoparasites JF - Folia Parasitologica (Praha) Y1 - 1987 A1 - Lars Lundqvist A1 - Anders Edler SP - 357 EP - 367 KW - animals KW - Anoplura KW - Finland KW - host parasite KW - Lice Infestations/epidemiology/parasitology/veterinary KW - mammal KW - Mite Infestations/epidemiology/parasitology/veterinary KW - Mites/physiology KW - Norway KW - Research Support, Non-U.S. Gov't KW - Sweden AB -Part-time ectoparasites on small mammals disperse via the habitat, while full-time parasites spread throughout the host population by direct contacts between host animals. It is therefore supposed that the effect of the natural environment is different for the two groups. This was studied as differences between observed and expected prevalence, the percentage of the infested host population, during different environmental conditions. Two possible mechanisms of such an effect were analysed, i.e. a) host selection and its change with host frequency and b) parasite migration and reproduction rates as reflected by the frequency distribution patterns on the hosts. As expected the prevalence of full-time ectoparasites (Anoplura and subfamily Laelapinae) could be predicted on the basis of host species frequencies during different environmental conditions, with the exception of one louse species (Hoplopleura acanthopus), because of its restricted distribution. Prediction was not possible for part-time ectoparasites (subfamily Hameogamasinae). Species of the subfamily Haemogamasinae were more catholic in host selection than species of Anoplura and subfamily Laelapinae. The haemogamasin mites changed host species to a greater extent than did Anoplura and Laelapinae. All haemogamasin mites had short-tailed frequency distribution patterns and all Anoplura and Laelapinae, except Hyperlaelaps microti, had long-tailed frequency distributions.
VL - 34 IS - 4 ER - TY - THES T1 - Life tactics and distribution of small mammal ectoparasites (Anoplura, Siphonaptera and Acari) in northernmost Fennoscandia Y1 - 1985 A1 - Lars Lundqvist KW - Beziehung zum Wirt KW - biology KW - ecology KW - Europe KW - Hoplopleura edentula KW - Insectivora KW - Polyplax KW - polyplax serrata KW - rodentia KW - Troester PB - Lund, Sweden. VL - Doctoral Dissertation. N1 - No. 1763 ER -