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Acute Toxicity of Nitrite and Ammonia to Daphnia similoides of Different Developmental Stages: Using the Modified Gaussian Model to Describe

Abstract

To gain an insight into the tolerance of Daphnia to nitrite and ammonia, a modified Gaussian model was used to describe the trends of changes in LC50s of nitrite and ammonia to Daphnia similoides at different developmental stages. LC50s of NO2–N and NH3–N increased with age before maturation and then decreased at maturation. A modified Gaussian model provided an accurate fit for the changes in LC50s of NO2–N and NH3–N, in which the parameters have definite biological meanings. From this model, we can gain an insight into the maximum LC50 and the age that has the maximum LC50 and predict LC50s at any specific ages. We suggest that such a model might be used to describe the trend in acute toxicity of some other zooplankton species at different stages.

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Acknowledgments

We would like to express our sincere thanks to the anonymous reviewers for their useful comments and suggestions on the article. This study was supported by the National Basic Research Program of China (2008CB418102). We declare that there is no potential conflict of interest.

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Correspondence to Zhou Yang.

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Xiang, F., Yang, W., Chen, Y. et al. Acute Toxicity of Nitrite and Ammonia to Daphnia similoides of Different Developmental Stages: Using the Modified Gaussian Model to Describe. Bull Environ Contam Toxicol 84, 708–711 (2010). https://doi.org/10.1007/s00128-010-0017-x

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Keywords

  • Acute toxicity
  • Modified Gaussian model
  • Nitrite
  • Ammonia
  • Daphnia similoides