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. 2010 Dec 8;119(5):615–621. doi: 10.1289/ehp.1002590

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Acute toxicity test for hatching rate (percentage of surviving embryos hatched) alterations in zebrafish embryos after exposure to various concentrations of Pb. Values represent (mean ± SD) time required (hpf) to reach levels of hatching (n = 3, with 50 subsamples per replicate).

^aData were excluded because analysis of this end point was confounded by concurrent mortality rates in the treatment group. *p ≤ 0.05 compared with controls.