Effects of atrazine and nitrate on northern leopard frog (Rana pipiens) larvae exposed in the laboratory from posthatch through metamorphosis

By John Allran, W. Karasov. 2000

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MULTIPLE STRESSORS AND SALAMANDERS: EFFECTS OF AN HERBICIDE, FOOD LIMITATION, AND HYDROPERIOD (2004, background): “Furthermore, atrazine can be quite persistent, with estimated half-lives in aquatic environments often exceeding 100 days (Diana et al. 2000), and can bioconcentrate in amphibian larvae (Allran and Karasov 2000).”
Nitrate toxicity to aquatic animals: a review with new data for freshwater invertebrates. (2005, background): “Allran and Karasov (2000), studying NaNO3 toxicity to larvae of the leopard frog Rana pipiens exposed from first-feeding stage through metamorphosis, found that a nominal nitrate concentration of 30 mg NO3-N/l had no significant effect on development rate, percent metamorphosis, time to…”
AGRICULTURAL PONDS SUPPORT AMPHIBIAN POPULATIONS (2004, background): “These concentrations were lower than concentrations documented in the laboratory to have negative effects on amphibian morbidity and mortality (Howe et al. 1998, Larson et al. 1998, Allran and Karasov 2000, 2001).”