The chronic toxicity of emamectin benzoate to three marine benthic species using microcosms

文献类型： 外文期刊

第一作者： Cheng, Bo

作者： Cheng, Bo;Cheng, Bo;Cheng, Bo;Van den Brink, Paul J.;Van Smeden, Jasper;Deneer, John;Belgers, Dick;Roessink, Ivo;Matser, Arrienne;Van den Brink, Paul J.;Foekema, Edwin

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关键词： Sediment bioassay; Emamectin benzoate; Benthic invertebrates; Arenicola marina; Corophium volutator; Cerastoderma edule

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.291； 五年影响因子：6.393 ）

ISSN： 0147-6513

年卷期： 2020 年 194 卷

页码：

收录情况： SCI

摘要： The commercial farming of Atlantic salmon, Salmo solar, may require the periodic application of emamectin benzoate (EB) treatments to reduce the effects of biological pests, such as sea lice. As a result, EB is detected in sediments beneath these fish farms at considerable levels. Literature sediment toxicity data for EB for marine benthic species is only available for 10-day sediment toxicity tests, which might be too short to assess field effects. Here, we present a sediment toxicity test to determine 28-day mortality and growth effect concentrations for the non-target polychaete worm Arenicola marina, the crustacean Corophium volutator and the mollusk Cerastoderma edule using a marine microcosm setup. Results indicate that no concentration-dependent increase of mortality and growth rate was apparent to A. marina and C. edule. But for C. volutator, a concentration-dependent increase in mortality was observed, resulting in a calculated 28-d LC50 of 316 mu g/kg dry sediment (95% confidence interval: 267-373 mu g/kg dry sediment). There were significant effects on C. volutator growth rate at concentrations of 100 mu g/kg dry sediment and above (NOEC = 30 mu g/kg dry sediment). These observations show that C. volutator is more sensitive to EB than A. marina, which differs from results reported in previous studies. Comparison to the most sensitive NOEC (30 mu g/kg dry sediment) found for C. volutator (organisms of 8-11 mm length), shows that the Environmental Quality Standard, derived by the Scottish Environment Protection Agency in 2017 which based on freshwater species data (NOEC = 1.175 mu g/kg dry sediment), are relatively strict and is sufficiently protective for the marine species tested in this paper.

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