Abstract
Population characteristics of Porcellium collicola (Verhoeff 1907) was analysed to describe the sex ratio and the fluctuation of the proportions of male, gravid female, postgravid female and non-reproductive female individuals. Material was collected by pitfall traps in 2011, in seven sampling sites in a heterogeneous woodland by the Deseda lake, near Kaposvár, Somogy County, South-Transdanubia, Hungary. During the sampling period 2898 specimens of P. collicola were trapped. The sex ratio was female biased (1:6,3). Surface activity of males was high in April and May and later their proportion gradually decreased until November. Gravid females were detected from the end of April to August and their number peaked in June. Percentage of postgravid females reached its highest value in the end of June and July. The proportion of non-reproductive females was high during the entire sampling period.
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