Sensitivity of Danio rerio (Teleostei, Cyprinidae) during two stages of development based on acute toxicity tests.

Sensitivity of Danio rerio (Teleostei, Cyprinidae) during two stages of development based on acute toxicity tests.

Bulletin of environmental contamination and toxicology (2014-08-30)

R Freiry, J A A Stelzer, L Maltchik, A Arenzon

ABSTRACT

The sensitivity of Danio rerio to three chemicals was compared at two growth stages [larval (10 ± 2 after hatching) and post-larval (60 ± 4 days after hatching)] based on acute toxicity tests. Thirty-nine 48 h acute toxicity tests were performed with the substances CuSO4, NaCl and KCl. The 48 h LC50 values at the two growth stages were compared by independent samples t-tests. The results showed a clear decrease in sensitivity when post-larval organisms were used. Since acute toxicity test methods for D. rerio that recommend using post-larval stage fish do not represent the most sensitive stage of the test organism, our study suggests a revision of the methods to use larval fish.

MATERIALS

Product Number

Brand

Product Description

60126

Sigma-Aldrich

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