Effects of triphenyltin and pH on the growth and development of rana lessonae and rana esculenta tadpoles

摘要

We tested the susceptibility of parental (Rana lessonae) and hemiclonal hybrid tadpoles of the R. Esculenta complex to triphenyltin (TPT), a fungicide commonly used in agriculture, at renewed concentrations of 0.11, 0.81, and 1.87 μg/L over the entire larval period. Because habitats of R. Lessonae are often characterized by a low pH and disturbed habitats such as gravel pits by high pH, we also tested whether pH 6.4 or pH 8.1 modifies their susceptibility to triphenyltin. We measure survival to metamorphosis, body mass at day 30, body mass at metamorphosis, and time to metamorphosis of individually reared tadpoles.