Assessment of median lethal concentration (CL50) of pollutants on Macrobrachium tenellum juveniles

Luis Eduardo Ruiz-González, Saúl Rogelio Guerrero-Galván, Karen Noemí Nieves-Rodríguez, Angélica Berenice Mejía-Acosta, Fernando Vega-Villasante

Submited: 2018-07-24 16:37:10 | Published:

DOI: https://doi.org/10.3856/vol46-issue3-fulltext-12

Abstract


Due to the presence of pollutants in aquatic systems, this research aims to analyze toxicity levels of Faena Clásico® , Asuntol® , sodium hypochlorite and diesel on Macrobrachium tenellum juveniles. For the purpose of this study, specimens from 2 to 4 cm in length were used. For glyphosate, hypochlorite and coumaphos bio-assays, a total of 8 individuals were placed per experimental unit, however, only 5 individuals were placed for diesel. Dead individuals were counted at the end of 24 h of exposure. All bioassays were performed in quintuplicate plus a negative control. The mean lethal concentration (LC50) was calculated by a Probit analysis and standard error. The mean lethal concentrations obtained are given at 6 h of exposure for 16 mL L-1 of diesel aqueous extract; and 24 h of exposure, solutions of Asuntol® 6 mg L-1, Classic Faena® 32 mg L-1 and sodium hypochlorite 59 mg L-1. Results show that the different chemicals assessed generate harmful damage to M. tenellum, since agrochemical compounds can cause alterations in the composition of ecosystems, reducing biodiversity in a temporarily or permanently manner.

Ruiz-González L, Guerrero-Galván S, Nieves-Rodríguez K, Mejía-Acosta A, Vega-Villasante F. Assessment of median lethal concentration (CL50) of pollutants on Macrobrachium tenellum juveniles. Lat. Am. J. Aquat. Res.. 2018;46(3): 589-592. Available from: doi:10.3856/vol46-issue3-fulltext-12 [Accessed 5 Jul. 2020].
Ruiz-González, L., Guerrero-Galván, S., Nieves-Rodríguez, K., Mejía-Acosta, A., & Vega-Villasante, F. (2018). Assessment of median lethal concentration (CL50) of pollutants on Macrobrachium tenellum juveniles. Latin American Journal of Aquatic Research, 46(3), 589-592. doi:http://dx.doi.org/10.3856/vol46-issue3-fulltext-12