Table 1 Shell diameter (D), shell height (H) (mean ± SD), population density (adults m⁻²), and timing characteristics of the reproductive period (R.P.) of Helix lucorum and Cepaea vindobonensis from the two study sites, Edessa and Axios. Number of individuals is given in parenthesis

Shell diameter (D)

37.88 ± 1.85^a

44.80 ± 2.10^b

23.98 ± 0.98^c

24.00 ± 0.96^c

Shell height (H)

33.32 ± 1.91^a

40.72 ± 2.98^b

20.20 ± 1.08^c

20.50 ± 0.93^c

Population density

7.40 ± 1.27

5.54 ± 1.44

2.85 ± 0.43

3.29 ± 0.65

Beginning of R.P.

Mid-April

Late March

Mid-April

Late March

End of R.P.

August

Early June

Mid-June

Early June