Responses of freshwater animals to sodium cyanide solutions III. tadpoles of Rana temporaria

Abstract

Experiments with tadpoles of Rana temporaria with sodium cyanide solutions gave generally similar results to those with fish and Gammarus. Tadpoles, however, are less sensitive than than fish but more sensitive than gammarus. The response limit for frog tadpoles is about 0.00001N. Changes of temperature, pH and dissoved oxygen had effects on their reactions similar to those seen with fishes and Gammarus