The seasonal dynamics of Haemaphysalis punctata, Rhipicephalus bursa and Dermacentor marginatus (Acari, Ixodidae) on sheep of Pais Vasco (Spain)
1990 - Volume: 31 Issue: 1 pages: 17-24
seasonal activity, climatic data
The seasonal dynamics of ticks from sheep in the Pais Vasco (North of Spain) and the correlation with the climatic data were studied. Haemaphysalis punctata Iarvae display a very short seasonal activity, lasting from August to mid-September,
with no significant correlations to climatic variables. The nymphs of this tick species follow a bimodal activity pattern, clearly in correlation with maximum temperature and rainfall. The adults are present during the cool-wet and warm-wet seasons and their activity is correlated to minimum air temperature. Adults of Rhipicephalus bursa showed also a bimodal seasonal pattern which extends July to September. Dermacentor marginatus is present only the late-winter (February) until mid-April. Both R. bursa and D. marginatus showed so many significant correlations as to attribute the regulation of activity to any group of factors.
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