Quantitative data on the geographic distribution of the European brown hare in the Czech Republic were analysed using a geographic information system with respect to selected environmental factors and natural foci of tularaemia. The highest population densities of the European brown hare were found in geographic areas of up to 200 m of elevation above sea (231.47 individuals/10 km 2), climatic district No. 1 (227.91 individuals/10 km2), annual snow cover duration of 40-60 days (183.95 individuals/10 km2), mean annual precipitation of 450-700 mm (174.71 individuals/10 km2), annual sunshine duration of 1801-2000 hour (169.72 individuals/10 km 2) and mean annual air temperature of over 10.0 °C (245.00 individuals / /10 km2). A correlation (r = 0.443, n = 395, t = 9.797, p = 0.01) between the population density of the European brown hare and numbers of natural foci of tularaemia in the Czech Republic was found. In other words, tularaemia seems to be dependent on the population density of the European brown hare.
Pikula, J., Beklová, M., Holešovská, Z., & Treml, F. (2004). Ecology of european brown hare and distribution of natural foci of tularaemia in the Czech Republic. Acta Veterinaria Brno, 73(2), 267–273. https://doi.org/10.2754/avb200473020267