caa a22 4500 469061189 CHVBK 20180323132857.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF01195789 doi (NATIONALLICENCE)springer-10.1007/BF01195789 The effects of nutritional status of rabbits and sheep on their resistance to the ticks Rhipicephalus evertsi evertsi and R. appendiculatus [Elektronische Daten] [Y. Rechav, L. Hay] Rabbits and sheep were exposed to low-and high-protein diets and subsequently infested three times with adults ofRhipicephalus appendiculatus andRhipicephalus evertsi evertsi. The mean weight ofR.e. evertsi females which dropped from rabbits maintained on a high-protein diet decreased from 515.0±24.9 mg (naive) to 381.5±25.0 (second infestation) to 340.3±23.3 mg (third infestation) while the weight of ticks fed on animals which were exposed to a low-protein diet did not change significantly (2.7%). The mean weight of engorged females ofR. appendiculatus which completed their blood meal on rabbits (high protein) decreased from 520.9±31.8 (naive) to 369.3±39 mg (3rd infestation), a significant decrease of 29.1% compared to a 12.3% decrease in weight between the 1 st and 3rd infestation of females fed on animals on a low-protein diet.Rhipicephalus e. evertsi fed on sheep exhibited the same phenomenon. The mean decrease in weight of 4rd-infestation ticks which dropped from sheep fed lucerne was 26.2% compared to 16.6% for ticks from sheep which were fed on grass. Hosts maintained on a low-protein diet failed to acquire resistance to ticks, lost weight and developed anaemia while those on a high-protein diet developed resistance, maintained weight and did not develop anaemia. The nutritional stress of the hosts and its application in South Africa are discussed. Elsevier Science Publishers B.V. All rights reserved, 1992 Rechav Y. Department of Biology, Medical University of Southern Africa, P.O., 0204, Medunsa, South Africa aut Hay L. Department of Biology, Medical University of Southern Africa, P.O., 0204, Medunsa, South Africa aut Experimental & Applied Acarology Kluwer Academic Publishers 15/3(1992-09-01), 171-179 0168-8162 15:3<171 1992 15 10493 https://doi.org/10.1007/BF01195789 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01195789 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rechav Y. Department of Biology, Medical University of Southern Africa, P.O., 0204, Medunsa, South Africa aut NATIONALLICENCE 700 1- Hay L. Department of Biology, Medical University of Southern Africa, P.O., 0204, Medunsa, South Africa aut NATIONALLICENCE 773 0- Experimental & Applied Acarology Kluwer Academic Publishers 15/3(1992-09-01), 171-179 0168-8162 15:3<171 1992 15 10493 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer