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首页> 外文期刊>Environmental toxicology and chemistry >Coupled Application of Antioxidant Defense Response and　Embryo Development in Amphipod Crustaceans in the　Assessment of Sediment Toxicity
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Coupled Application of Antioxidant Defense Response and　Embryo Development in Amphipod Crustaceans in the　Assessment of Sediment Toxicity

机译：抗氧化防御反应和胚胎发育在Amphipod甲壳类动物中的评估中沉积物毒性评估的应用

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摘要

Survival rate, frequency of malformed embryos, and antioxidant defense system responses in the benthic amphipod Gmelinoides fasciatus from the Baltic Sea were measured to examine the effects of toxic sediments, and to assess the usefulness of these endpoints in sediment toxicity biotesting. A highly contaminated sediment sample from the Baltic Sea was diluted with sediment from a clean site to come up with a series of 5 test sediments with dilutions from 1:32 to 1:1024, and the reference sediment. The 1:32 dilution of the test sediment was analyzed for organotins (2862 mu g tin [Sn] kg dry wt (-1)), polycyclic aromatic hydrocarbons (6064 mu g kg dry wt (-1)), and selected trace metals (e.g., copper 352 mg kg dry wt (-1)). The survival rate of G. fasciatus (10-d toxicity test) was 100% in the reference and 1:1024 treatments, and began to decline from the 1:256 dilution onward. In a 28-d experiment, various types of morphological malformations were observed in 11 to 80% of the amphipod embryos in the 1:64, 1:128, and 1:256 dilutions, with only 5% in the reference treatment. Also, elevated activities in the antioxidant defense system enzymes glutathione S-transferase and catalase were observed in amphipods exposed to the contaminated sediments compared with the reference treatment, with responses at lower contamination levels compared with the appearance of malformations in the embryos. The results obtained illustrate the effectiveness of the combined application of embryonic malformations and antioxidant defense system biomarkers in amphipods in the assessment of sediment toxicity, and potentially also of sublethal effects of chemical contamination in aquatic ecosystems. Environ Toxicol Chem 2019;00:1-12. (c) 2019 SETAC
机译：测量了来自波罗的海的Benthic Amphipodgegoides Fasciatus的生存率，畸形胚胎和抗氧化剂防御系统反应，以检查有毒沉积物的影响，并评估这些肢体毒性生物活性的这些终点的有用性。从干净的沉积物稀释来自干净的部位的高度污染的沉积物样品，将一系列5个测试沉积物，1：32至1：1024和参考沉积物。分析1:32的测试沉积物的稀释，用于有机键（2862μg锡[Sn] Kg Dry WT（-1）），多环芳烃（6064μg干燥WT（-1）），以及选定的痕量金属（例如，铜352mg kg干燥wt（-1））。 G. fasciatus（10-D毒性测试）的存活率在参考文献中为100％，1：1024治疗，并开始从1：256稀释下降。在28-D实验中，在1:64,1：128和1：256稀释液中在11至80％的Amphipod胚胎中观察到各种形态畸形，仅在参考处理中仅为<5％。此外，在与参考处理相比，在暴露于污染沉积物的两种接触到污染的沉积物的两窝上观察到抗氧化剂防御系统酶的升高的活性，与胚胎中畸形的外观相比，在较低的污染水平下的反应。得到的结果说明了胚胎畸形和抗氧化防御系统生物标志物在沉积物毒性评估中的组合应用胚胎畸形和抗氧化剂防御系统生物标志物的有效性，并且可能也具有化学污染在水生生态系统中的亚致致致致致致致致致致致致致敬。环境毒素科学2019; 00：1-12。 （c）2019 Setac

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