Fish Physiology and Biochemistry ( IF 2.9 ) Pub Date : 2021-06-18 , DOI: 10.1007/s10695-021-00968-z Marcelo Barbosa Henriques 1 , Karina Fernandes Oliveira Rezende 2 , Leonardo Castilho-Barros 1 , Edison Barbieri 3
The objective of this study was to analyze the sublethal effects of propiconazole on Deuterodon iguape, a native fish common in Brazil, which has potential for aquaculture and use as a bioindicator. The hypothesis was to test whether D. iguape has a metabolism similar to Danio rerio so that its use in bioassays may be validated. Lethal concentration (LC50) and metabolic rates were studied in fish exposed to propiconazole. Specific oxygen consumption and ammonia excretion for D. iguape and D. rerio increased by 0.01 µg L−1 and then decreased as the propiconazole concentration increased. The decrease in the averages of specific oxygen consumption at the concentration of 0.1 µg L−1 represented a reduction in the metabolic rate compared to the control of 71% for D. iguape and 40% D. rerio. For the ammonia excretion, at the same concentration, there was a reduction of 68.7% and 45.4% for D. iguape and D. rerio, respectively. When comparing ammonia excretion of the two species for each concentration of propiconazole, there was a significant difference (p < 0.05) in relation to the control and for the highest concentration (0.1 µg L−1). As for specific oxygen consumption, there was a statistically significant difference only for the concentration of 0.1 µg L−1. D. iguape proved to be a good and useful bioindicator for ichthyologists or ecologists in studies of moderate pesticide contamination in freshwater aquatic environments, as its metabolic response was similar to D. rerio.
中文翻译:
丙环唑对lambari Deuterodon iguape代谢的亚致死作用(Eigenmann 1907),一种来自巴西的本地物种
本研究的目的是分析丙环唑对巴西常见的原生鱼类Deuterodon iguape的亚致死作用,该鱼类具有用于水产养殖和用作生物指示剂的潜力。该假设是为了测试D. iguape是否具有类似于Danio rerio的代谢,以便可以验证其在生物测定中的应用。在暴露于丙环唑的鱼中研究了致死浓度 (LC50) 和代谢率。D. iguape和D. rerio 的特定耗氧量和氨排泄量增加了 0.01 µg L -1,然后随着丙环唑浓度的增加而降低。浓度为 0.1 µg L 时比氧消耗的平均值降低-1表示与D. iguape和 40% D. rerio的对照相比,代谢率降低了 71% 。对于氨排泄,在相同浓度下,D. iguape和D. rerio分别减少了 68.7% 和 45.4% 。当比较每种丙环唑浓度的两种物质的氨排泄时 ,相对于对照和最高浓度(0.1 µg L -1)存在显着差异(p < 0.05 )。至于比耗氧量,仅0.1 µg L -1的浓度存在统计学上的显着差异。D.伊瓜佩被证明是鱼类学家或生态学家研究淡水水生环境中度农药污染的良好和有用的生物指标,因为其代谢反应类似于D. rerio。