Species Composition and Seasonal Dynamics of Ticks (Ixodoidea) at Abernosa, Ethiopia.
1997
Sisay Asres and Feseha Gebreab
A study was conducted to obtain knowledge base on the tick fauna present relative abundance and seasonal dynamics on cattle at Abemosa ranch For the purpose adult ticks were collected in 12 regular and over six extraordinary samplings from December 1986 to December 198 7. Fiver major cattle tick species of four genera were recovered viz Rbipicephalus simus, Rbipcephalus evertsi, Amblyomma variegatum Hyalomma. m. rufipes and Boophilus decoloratus A striking seasonally in the overall-abundance was observed from June to August. A rise in the number of adults of A. variegatum was seen from March to May R. Simus from Juneto September and Hyalomma m. rufipes from August 'to September (P 0.05). Of tbe ma]or climatic variables, minimum temperature and rainfall significantly influenced the abundance of the overall ticks fauna particularly that of Rsimus, H.m. rufipes and Amblymnma variegatum The effect of minimum temperature was found to be much more pronounced in the case of Revertsi and Bdecoloratus Further study on A.variegatum and B.decoloratus, the two economically most important tick species for Ethiopia, encompassing dessication vulnerable larvae is required to precisely determine the pattern of the ticks seasonal dynamics. When this becomes clear impossible to implement an effective integrated tick management system for the area.
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