Abstract
Palmate newt larvae were exposed to a series of different concentrations of ammonium nitrate under laboratory conditions. Survival data analysis, which took account of the probability that an individual survives beyond a certain time and the likelihood of death as a function of age, was used to model time to death for each of the treatments. Initial mass and ammonium nitrate concentration were found to be highly significant: hazard of death decreased with increased mass and increased ammonium nitrate concentration. These results are discussed in terms of the possible impact of this fertilizer on newt populations in agricultural areas
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