caa a22 4500 386399611 CHVBK 20180307112153.0 cr unu---uuuuu 161130e198908 xx s 000 0 eng 10.1017/S0031182000072206 doi S0031182000072206 pii (NATIONALLICENCE)cambridge-10.1017/S0031182000072206 Adaptation of field strains of Rhipicephalus appendiculatus Neumann (Acarina: Ixodidae) to host resistance [Elektronische Daten] A comparison of feeding and breeding performance was made between a laboratory strain (LS) and two freshly collected field strains (FS1, FS2) of Rhipicephalus appendiculatus. The LS had been cultured for over 30 years on tick-susceptible rabbits. When fed on susceptible rabbits LS produced smaller eggs and unfed larvae, nymphs and adults than those of FS. Eggs and larvae from females engorged on cattle were larger than those from females engorged on rabbits. LS and FS females engorged on susceptible hosts were of similar weight, but the FS females were twice as heavy as LS females when tick-resistant hosts were used. A higher proportion of LS ticks than of FS ticks engorged on susceptible hosts, but a lower proportion on resistant hosts. Thus on susceptible hosts LS showed a higher reproduction efficiency than FS, but a lower one than FS on resistant hosts. The proportional reductions of engorged weights and numbers feeding successfully on resistant hosts were significantly lower for LS than FS ticks. Cross-resistance was low between LS and FS. Although all strains were affected by host resistance, it was concluded that the field strains were better adapted to withstand resistance than the laboratory strain. Copyright © Cambridge University Press 1989 Rhipicephalus appendiculatus nationallicence adaptation nationallicence host resistance nationallicence feeding nationallicence breeding performance nationallicence Chiera J. W. The International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya Newson R. M. The International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya Karuhize G. R. University of Nairobi, P.O. Box 30197, Nairobi, Kenya Parasitology Cambridge University Press 99/S1(1989-08), 149-155 0031-1820 99:S1<149 1989 99 PAR https://doi.org/10.1017/S0031182000072206 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0031182000072206 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chiera J. W. The International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya NATIONALLICENCE 700 1- Newson R. M. The International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya NATIONALLICENCE 700 1- Karuhize G. R. University of Nairobi, P.O. Box 30197, Nairobi, Kenya NATIONALLICENCE 773 0- Parasitology Cambridge University Press 99/S1(1989-08), 149-155 0031-1820 99:S1<149 1989 99 PAR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence SWISSBIB 386399263 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge