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(W/MF172) Population parameters of the beetle Pterostichus oblongopunctatus F. from metal contamined and reference areas. Lagisz, Malgorzata1, Laskowski, Ryszard1, Kramarz, Paulina1, Tobor, Maria1, 1 ABSTRACT- Adult individuals of carabid beetles (Pterostichus oblongopunctatus F.) were sampled from five sites along the soil pollution gradient. Metals concentrations in soils ranged from approximately 150 mg/kg to 10500 mg/kg Zn, 136 to 2600 mg/kg Pb, and 0.84 to 81.9 mg/kg Cd. To study population parameters all animals were kept in laboratory (controlled temperature, humidity, fotoperiod) and fed with uncontamined food. The number of eggs per week per female was significantly higher in population from uncontamined site and also was positively related to female body mass. Hatching rate for eggs was decreasing with increasing contamination (p=0.0388). No significant effect of pollution was found on the larvae survival rates. However, the survival rate was negatively related to female collection date (p<0.05). The body weight of adults from F1 generation originating from uncontamined sites was significantly higher, whereas the weight of their mothers (P generation) was lower. Increasing metal contamination in terms of parents` habitats had no significant effect on development time of F1. The hatching weight of adult F1 beetles decreased with increasing development time (p<0.001). Broods originating from the most contamined sites had significantly smaller proportion of males, while in other broods the sex ratio was 1:1. Key words: Carabidae, metals contamination, population parameters, fitness |
