Zinc monitoring on adults of Rana esculenta complex
Abstract
Concentration of zinc was examined on adults of Rana esculenta complex. Frogs were caught from two locations: the Túr river and an oxbow lake, called Miskafoki Holt-Tisza. The Túr river in North-East Hungary was contaminated with heavy metals, especially zinc, resulted in by mining activities. Zinc concentration was measured in the skin, thigh-bone, thigh-muscle, foot-bone, liver and frogs’ toes. There were no statistically significant difference in the zinc concentration in the skin, thigh-bone, thigh-muscle, footbone, and liver between the studied populations. The zinc concentration was significantly higher in the toes of the frogs in the Túr (mean ± SD: Túr 0.8 ± 0.13 µg/toe, Miskafoki Holt-Tisza 0.24 ± 0.04 µg/toe). Our results suggest that the level of zinc concentration is probably not harmful to the frog populations.
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