Assessment of abundance and distribution of the Roman snail (Helix pomatia L.) in Poland. II. Podlaskie voivodeship

The results of research on abundance, distribution and structure of the Roman snail (Helix pomatia L.) populations, conducted in 2011 in Podlaskie voivodeship, are presented. All the communes were thoroughly checked in the spring and summer. In 374 sample sites 4,109 individuals of H. pomatia were recorded. The average density for the voivodeship was approximately 0.6 individual per 1 are (= 6 thousand individuals/1 km2). The biomass of adult individuals was estimated at 900 tons. Most of the surveyed local populations were stable or dynamic, characterised by a high proportion of juveniles.