Detection of Ixodes ricinus ticks on Sredny Island highlights possible independent populations in northern taiga.
The detection of 2 nymphs and 3 adult Ixodes ricinus ticks (L., 1758) above the generally accepted northern boundary of the range on Sredny Island of the Keret Archipelago (66°16'50–66°17'55 N, 33°37'50–33°42'40 E) in the Kandalaksha Bay of the White Sea is described. The possibility of the existence of independent populations of the sheep tick in the conditions of the northern taiga is shown on the basis of the temperature needs of ticks for the realization of life cycles, as well as the sum of temperatures for periods with an average daily air temperature steadily above 10 °C and the duration of these periods.
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Samoylova et al. (2025) studied this question.
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