The acute toxicity of marine-grade creosote, expressed as the 96-h LC50, is 0.018 mg/L for mysids (Mysidopsis bahia Molenock), 0.24 mg/L for pink shrimp (Penaeus duorarum Burken-road) and 0.72 mg/L for sheepshead minnows (Cyprinodon variegatus, Lacépède). The 96-h EC50 (shell deposition) for Eastern oysters (Crassostrea virginica Gmelin) is 0.71 mg/L. Mysid bioassays and chemical analyses estimate the half-life (≤ 1 week) for marine-grade creosote in seawater.
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Borthwick et al. (1982) studied this question.
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