Pesticides have been identified as one of the major reasons for the worldwide decline of amphibian populations. In terms of aquatic amphibian exposure, most ecotoxicological studies concentrate on testing tadpoles in Gosner stage (GS) 25. To examine the representativeness of GS25, we exposed five aquatic stages of European common frogs (Rana temporaria) to the viticultural fungicide folpet (Folpan® 80 WDG) in a dose–response setup. The 96-h mortality data identified the hatchling stage GS20 as the most sensitive aquatic stage (LC50 of GS15: 2.68 mg/L, GS20: 1.01 mg/L, GS25: 1.22 mg/L, GS36: 2.11 mg/L, GS42: > 2.6 mg/L). Because these results suggest that the commonly used stage is not sufficient for a protective environmental risk assessment of pesticides, comprehensive investigations are needed to provide adequate regulatory guidance.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 54 • No. 3