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Co-occurrence of agile frog (Rana dalmatina Fitz. in Bonaparte) with common frog (Rana temporaria L.) in breeding sites in Southern Poland

Bartoń Kamil, Rafiński Jan

Polish Journal of Ecology

2006

Vol. 54, nr 1

151-157

A location (area 10 km^2) of the agile frog (Rana dalmatina Fitz. in Bonaparte) in a southwest part of the Sandomierz Valley (Southern Poland), was surveyed during 4 breeding seasons (1999-2002). Eighteen breeding sites of brown frogs were inspected for their characteristics, presence and numbers of egg-batches, and time of egg deposition. Breeding sites were typically temporary, small, and shallow waters (area 5-30 m^2, depth <50 cm). The agile frog was found to co-occur only with the common frog (Rana temporaria L.) in most of the sites. Based on the number of egg-batches, the agile frog was more numerous (total of 315 batches in year 2002) than the common frog (163). Over the four years of the study, there were no significant fluctuations in the numbers of eggs. The two species did not differ significantly in their choice of the habitats, except for the sites with low water pH, used predominantly by the agile frog. Habitat niche overlap was high (Pianka.s O = 0.86). In the acid pea In the acid peat bogs (water pH about 4.5) most of the eggs degenerated.

Combined effects of lead ions and UV radiation on general met abolism in common frog Rana temporaria Linnaeus, 1758 Larvae

Formicki G., Stawarz R., Zamachowski W.

Chemia i Inżynieria Ekologiczna

2006

Vol. 13, nr 1-2

23-27

General metabolism and lead accumulalion was studied in common frog tad-poles irradiated with UV (UV-A of 0.24 kJ . m-2, UV-B of 2.7 kJ . m-2) during lead poisoning (1 mg/dm3 Pb2+) and during recovery after lead poiso-ning. General melabolism of larvae during lead poisoning ranged between 0.061 +- 0.004 and 0.079 +- 0.016 mg O2/g . h-1 and the differences between experimental groups were insignificant. Significanl differences occurred after the 24, 48 and 72 hours of recovery period after the Pb2+ poisoning. General metabolism of tadpoles exposed lo UV during recovery period after lead poisoning was increasing, after initial drop (0.059 +- 0.010 mg 02/g. h-1), reaching the highesl level of 0.192 +- 0.028 mg O2/g . h-1 after 72 h. The level of accumulated lead ranged from 0.305 +- 0.156 to 0.521 +- 0.263 mg/g d.m. UV did not influence significanlly on lead accumulation and removal.

Zbadano metabolizm ogólny i poziom skumulowanego ołowiu u larw żaby trawnej naświetlanych promieniowaniem UV (UV-A - 0.24 kJ . m-2, UV-B - 2.7 kJ . m-2) w czasie zatruwania ołowiem (1 mg/dm3 Pb2+) i w okresie od-truwania. Larwy w czasie zatruwania ołowiem zużywały od 0.061 +- 0.004 do 0.079 +- 0.016 mg O2/g . h-1. Różnice pomiędzy poszczególnymi grupami nie były statystycznie istotne. Znaczące różnice zaobserwowano po 24, 48 i 72 godzinach odtruwania. Poziom metabolizmu ogólnego larw eksponowanych na UV w czasie odtruwania początkowo się obniżył (0.059 +- 0.010 mg O2/g . h-1), a następnie wzrósł osiągając największe wartości po 72 godzinach od-truwania (0.192 +- 0.028 mg O2/g . h-1). Badane larwy skumulowały od 0.305 +- 0.156 do 0.521 +- 0.263 mg/g s.m. ołowiu. Nie stwierdzono znaczącego wpływu UV na kumulację i usuwanie jonów ołowiu z organizmu badanych larw.