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Survival and Contaminants in Imperiled and Common Riverine Fishes Assessed with an In Situ Bioassay Approach
Environmental Toxicology and Chemistry ( IF 4.1 ) Pub Date : 2021-05-06 , DOI: 10.1002/etc.5104
Casey A Grieshaber 1 , W Gregory Cope 2 , Thomas J Kwak 3 , Tiffany N Penland 1 , Ryan J Heise 4 , J Mac Law 5
Affiliation  

An in situ bioassay approach was used to determine whether aquatic contaminant stressors in a large Atlantic river ecosystem affect the survival of 3 fish species: the largemouth bass (Micropterus salmoides, juveniles), the fathead minnow (Pimephales promelas, adults), and the robust redhorse (Moxostoma robustum, juveniles). Hatchery-propagated fish were placed into cages to assess site-specific survival in the Yadkin-Pee Dee River of North Carolina and South Carolina, USA. Contaminants were measured in caged fish and sediment and surface water at each site. No apparent longitudinal trends in fish survival were detected, and contaminant concentrations varied among sites. Juvenile largemouth bass and robust redhorse did not survive past 13 and 23 d, with corresponding Kaplan-Meier median survival estimates of 9.7 and 12.1 d, respectively. Survival of adult fathead minnows deployed in cages alongside the juvenile fish averaged 43% at the end of the 28-d exposure, with a 22-d median survival estimate. The intersex condition, an indicator of endocrine disruption, was not observed in any adult fathead minnow. Contaminant accumulation in surviving fathead minnows was apparent, with highest accumulated concentrations of polychlorinated biphenyls (34.6–93.4 ng/g dry wt), organochlorine pesticides (19.9–66.1 ng/g dry wt), and mercury (0.17–0.63 μg/g dry wt). Contaminants and other water quality stressors in this river system appear to detrimentally impact juvenile fish survival, with presumed effects at the fish assemblage and community levels. Environ Toxicol Chem 2021;40:2206–2219. © 2021 SETAC

中文翻译:

用原位生物测定法评估濒危和常见河流鱼类的存活率和污染物

使用原位生物测定方法来确定大型大西洋河流生态系统中的水生污染物压力源是否影响 3 种鱼类的生存:大嘴鲈鱼(Micropterus salmoides,幼鱼)、黑头鲦鱼(Pimephales promelas,成鱼)和健壮的红马 ( Moxostoma robustum),青少年)。在美国北卡罗来纳州和南卡罗来纳州的 Yadkin-Pee Dee 河中,将孵化场繁殖的鱼放入网箱中以评估特定地点的存活率。对每个地点的笼养鱼、沉积物和地表水中的污染物进行了测量。没有检测到鱼类存活的明显纵向趋势,并且污染物浓度因地点而异。幼年大嘴鲈鱼和健壮的红马在 13 天和 23 天后都没有存活,相应的 Kaplan-Meier 中位存活估计分别为 9.7 和 12.1 天。在 28 天暴露期结束时,与幼鱼一起被部署在笼子中的成年黑头鲦鱼的平均存活率为 43%,估计中值为 22 天。在任何成年黑头鲦鱼中都没有观察到双性人状况,这是内分泌紊乱的一个指标。幸存的黑头鲦鱼的污染物积累很明显,多氯联苯(34.6-93.4 ng/g 干重)、有机氯农药(19.9-66.1 ng/g 干重)和汞(0.17-0.63 μg/g 干重)的积累浓度最高重量)。该河流系统中的污染物和其他水质压力源似乎对幼鱼的生存产生不利影响,推测对鱼类群落和社区水平有影响。环境毒物化学2021;40:2206–2219。© 2021 SETAC
更新日期:2021-05-06
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