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Mortality in the rockpool shrimp Palaemon elegans following long-term exposure to low doses of the anti-parasitic drug teflubenzuron
Aquaculture Environment Interactions ( IF 2.2 ) Pub Date : 2020-01-30 , DOI: 10.3354/aei00343
OB Samuelsen , AE Parsons , AL Agnalt , T Tjensvoll , BT Lunestad , R Hannisdal

Anti-parasitic drugs used to control sea lice infestations in the salmonid aquaculture industry are a growing environmental concern due to their potential impacts on non-target crustacean species. This study examined the lethal effects of teflubenzuron, a common in-feed pharmaceutical drug used on Norwegian salmon farms, on a non-target species, rockpool shrimp Palaemon elegans, following an extended exposure period. The standard daily dose for treating salmon is 10 μg teflubenzuron g−1 fish. Adult shrimp were fed 1 of 6 low doses of teflubenzuron (0, 0.0025, 0.005, 0.05, 0.094, 0.188 and 1.88 μg g−1) twice a week for a period of 66 d. Cumulative mortality reached 15, 27, 82 and 100% amongst shrimp exposed to the highest treatment groups (0.05, 0.094, 0.188 and 1.88 μg g−1, respectively). Cumulative mortality amongst shrimp exposed to the 2 lowest teflubenzuron doses and control feed was low (5%). Dose response curves based on measured concentrations within the shrimp were used to calculate a series of lethal threshold concentrations (LCx). The LC5, LC50 and LC90 concentrations of teflubenzuron causing low, median and high levels of mortality in rockpool shrimp were estimated to be 1.2, 18.4 and 150.6 ng g−1, respectively. These concentrations are similar to those reported in wild crustacean species, including shrimp species in the vicinity of Norwegian fish farms, both during and after teflubenzuron medication, suggesting that exposure to low doses of this compound can pose a significant risk to wild shrimp populations.

中文翻译:

石池虾线虫长期接触低剂量抗寄生虫药七氟苯脲后的死亡率

用于控制鲑鱼养殖业中海虱侵扰的抗寄生虫药物由于对非目标甲壳类物种的潜在影响而日益受到环境问题的关注。本研究检查了七氟苯脲(一种用于挪威鲑鱼养殖场的常见饲料药物药物)在长时间暴露后对非目标物种岩池虾线虫的致死作用。治疗鲑鱼的标准日剂量是 10 μg teflubenzuron g-1 鱼。成年虾每周两次喂食 6 种低剂量七氟苯脲(0、0.0025、0.005、0.05、0.094、0.188 和 1.88 μg g-1)中的一种,持续 66 天。在暴露于最高处理组(分别为 0.05、0.094、0.188 和 1.88 μg-1)的虾中,累积死亡率达到 15%、27%、82% 和 100%。暴露于 2 个最低剂量的七氟苯脲和对照饲料的虾的累积死亡率较低 (5%)。基于虾内测量浓度的剂量反应曲线用于计算一系列致死阈值浓度 (LCx)。七氟苯脲的 LC5、LC50 和 LC90 浓度导致岩池虾的低、中和高死亡率,估计分别为 1.2、18.4 和 150.6 ng g-1。这些浓度与野生甲壳类动物物种(包括挪威养鱼场附近的虾类)中报告的浓度相似,无论是在服用七氟苯脲期间还是用药后,这表明接触低剂量的这种化合物会对野生虾种群构成重大风险。基于虾内测量浓度的剂量反应曲线用于计算一系列致死阈值浓度 (LCx)。七氟苯脲的 LC5、LC50 和 LC90 浓度导致岩池虾的低、中和高死亡率,估计分别为 1.2、18.4 和 150.6 ng g-1。这些浓度与野生甲壳类动物物种(包括挪威养鱼场附近的虾类)中报告的浓度相似,无论是在服用七氟苯脲期间还是用药后,这表明接触低剂量的这种化合物会对野生虾种群构成重大风险。基于虾内测量浓度的剂量反应曲线用于计算一系列致死阈值浓度 (LCx)。七氟苯脲的 LC5、LC50 和 LC90 浓度导致岩池虾的低、中和高死亡率,估计分别为 1.2、18.4 和 150.6 ng g-1。这些浓度与野生甲壳类动物物种(包括挪威养鱼场附近的虾类)中报告的浓度相似,无论是在服用七氟苯脲期间还是用药后,这表明接触低剂量的这种化合物会对野生虾种群构成重大风险。Rockpool 虾的中位数和高死亡率估计分别为 1.2、18.4 和 150.6 ng g-1。这些浓度与野生甲壳类动物物种(包括挪威养鱼场附近的虾类)中报告的浓度相似,无论是在服用七氟苯脲期间还是用药后,这表明接触低剂量的这种化合物会对野生虾种群构成重大风险。Rockpool 虾的中位数和高死亡率估计分别为 1.2、18.4 和 150.6 ng g-1。这些浓度与野生甲壳类动物物种(包括挪威养鱼场附近的虾类)中报告的浓度相似,无论是在服用七氟苯脲期间还是用药后,这表明接触低剂量的这种化合物会对野生虾种群构成重大风险。
更新日期:2020-01-30
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