BIOLOGICAL RESPONSES OF A SIMULATED MARINE FOOD CHAIN TO LEAD ADDITION
BIOLOGICAL RESPONSES OF A SIMULATED MARINE FOOD CHAIN TO LEAD ADDITION
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DOI：
10.1002/etc.537
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发表时间：
2011-07-01
影响因子：
4.1
通讯作者：
Paez-Osunat, Federico
中科院分区：
文献类型：
--
作者：
Soto-Jimenez, Martin F.;Arellano-Fiore, Claudia;Paez-Osunat, Federico
本研究旨在评估沿着一个简化的四级食物链对铅的生物学反应，该食物链来自初级生产者--微藻Tetraselmis suecica，其生长在含有< 1 μ g/L铅的对照培养基中并暴露于亚致死剂量（20微克/升的铅），并作为模拟食物链的基础，通过初级，二级和三级消费者，即，卤虫，卤虫，白腿虾，凡纳滨对虾，和咕噜鱼，海缪龙scudderi，分别。铅暴露T. suecica的存活率比对照培养物低40%;用这种饮食喂养的Franciscana比对照组低25 - 30%。铅暴露和控制虾和鱼的生长速度没有差异，没有明显的总体形态变化暴露标本。然而，暴露的虾和鱼的死亡率分别比对照组高出20%和15%。此外，在暴露的虾和鱼中观察到行为改变，包括摄食量减少或停止摄食、呼吸水中空气、运动性降低和不稳定的游泳。虾类和鱼类全身铅含量与富尔顿条件因子呈负相关，也表明铅的积累对暴露生物产生了胁迫作用。Environ.毒理学. 2011;30：1611-1617。(C)2011年SETAC
This investigation sought to assess the biological responses to Pb along a simplified four-level food chain, from the primary producer, the microalgae Tetraselmis suecica, grown in a control medium with < 1 mu g/L of Pb and exposed to a sublethal dose (20 mu g/L of Pb) and used as the base of a simulated food chain, through the primary-, secondary-, and tertiary-level consumers, namely, the brine shrimp, Artemia franciscano; the white-leg shrimp, Litopenaeus vannamei; and the grunt fish, Haemulon scudderi, respectively. Growth of Pb-exposed T. suecica was 40% lower than that of the control cultures, and survival of A. franciscana fed this diet was 25 to 30% lower than the control. No differences in the growth rates of Pb-exposed and control shrimp and fish and no gross morphological changes were evident in the exposed specimens. However, the exposed shrimp and fish had 20 and 15% higher mortalities than their controls, respectively. In addition, behavioral alterations were observed in exposed shrimp and fish, including reduction in food consumption or cessation of feeding, breathing air out of the water, reduction of motility, and erratic swimming. The negative correlation between Pb concentration in whole body of shrimp and fish and Fulton's condition factor suggested also that the exposed organisms were stressed because of Pb accumulation. Environ. Toxicol. Chem. 2011;30:1611-1617. (C) 2011 SETAC