Population dynamics of the sheep gadfly <i>Oestrus ovis</i> L., 1761 in Siberia
Abundance indices of imaginal and larval stages of sheep gadfly from different populations in Siberia are discussed with an IA (abundance index) for the imagos in the range 0.05-0.28 and for larvae in the range 5.7-36.7. The dependence of sheep gadfly abundance on weather-climatic and economic conditions of sheep husbandry is shown. The changes in abundance indices for different years do not exceed 25-30 % of the average long-term population sizes in the absence of restrictive measures. The close dependence between average abundance indices of imaginal and larval stages of gadfly is clearly demonstrated by a linear regression equation. Each population has individual parameters, and these data allow one to determine the value of each parameter according to the characteristics of another.