Studies on the Survival and Biological Behaviour of Hyalamma anatolicum Anatolim (Koch 1984) (Acari: Ixodidae).

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Ahmed, Ahmed ELGhali
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Hya1onuna.a. anatolicum is considered to be the most economically important tick in the Sudan, as it is the main vector of' the fatal disease, bovine tropical theileriosis Theileria anu1ata . This work was conducted to study the effects of different temperature and relative humidity regime on different aspects of' the biology of this tick. During the experiment, the different stages of H. a. anatolicum were fed on rabbits ears. Then different stages (flat or engorged) were exposed to 15 °C, 27 °C, 35 °C and 40°C 38 °C in water balance) and 97.8%, 73.5% and 63.5% R. Hs. The different developmental parameters, water-relations, survival and behaviour were studied under these different conditions. The results of' this study showed that H.a. anatolicum when fed on rabbits behaves as 2-host and 3-host tick. Temperature signif'icant1y affects all developmental parameters. The effect of' R.H. on these parameters was almost slight. 35 °C and 97.8% R.H. was the optimum condition; for all developmental parameter except eggs coversion efficiency which was highest at 27°C and 97.8% R.H. Temperature and R.H. affect the relationship between the female engorged weight and both eggs weight and oviposition periods. Both temperature and R.H. significantly affect the water-relation of larvae, nymphs, males and females and also affect survival of the nymphs. The effect of temperature was significant on larvae survival, while that of R.H. was slight. Dehydrate flat adult ticks could respond easily to differences in R.H. and showed hygropositive reactions.
Studies on the Survival and Biological Behaviour of Hyalamma anatolicum Anatolim