Abstract (en):
Mature specimens of three catfishes: Capitán de la Sabana (Eremophilus mutisii), Bagre Rayado (Pseudoplatystoma orinocoense and P. metaense) and Capaz (Pimelodus grosskopfii) (n=9-27/species) were sampled in the areas of Bogotá River, Puerto López (Meta) and Betania Dam (Huila, Colombia), respectively. Levels of blood lead, plasma cholinesterase (ChE) activity and erythrocytic micronuclei were investigated. Water samples from each location were analyzed for physico-chemical parameters, metals (lead, cadmium, iron and zinc), total petroleum hydrocarbons (TPHs), benzo[a]pyrene, screening test for organophosphates/carbamates and the herbicides glyphosate and atrazine. The main findings in the fish were the presence of lead above 3.3 μg/dL in the blood of 93 % of the Capitanes, 44% of the Bagres and 28% of the Capaces, as well as a lower ChE activity in the Capitán as compared to Bagre Rayado and Capaz. No significant numbers of micronuclei were found in any of the species. In the water samples, 7- 14 ppm equivalents of TPHs were found in the Bogotá River (Suesca) and 1.5 - 3.5 ppm in the Meta River. Levels of glyphosate (0.5 â 4.0 ppb) were found in the Meta River. The xenobiotic nature of lead makes its presence in the fish an abnormal finding, as is the presence of TPHs and glyphosate in the water samples.
Abstract (es):
Se evaluaron ejemplares adultos de las especies capitán de la Sabana (Eremophilus mutisii), bagre rayado (Pseudoplatystoma orinocoense y P. metaense) y capaz (Pimelodus grosskopfii) (n=9-27/especie), provenientes del río Bogotá (Cundinamarca), Puerto López (Meta) y represa de Betania (Huila, Colombia), respectivamente. Se investigó la presencia de plomo en sangre, actividad colinesterasa (ChE) plasmática y micronúcleos eritrocíticos. Adicionalmente se evaluaron en muestras de agua los parámetros físico-químicos, metales (plomo, cadmio, hierro y zinc), hidrocarburos totales de petróleo (TPHs), benzo[a]pireno, organofosforados/carbamatos y los herbicidas glifosato y atrazina. Los principales hallazgos en los ejemplares fueron la presencia de plomo en sangre (93% capitanes, 44% bagres rayados y 28% capaces) con niveles por encima de 3,3 μg/dL, y una disminución significativa de la actividad ChE en el capitán de la sabana con respecto al bagre rayado y al capaz. No se presentó un número significativo de micronúcleos en alguna de las especies. En las aguas, se encontraron 7-14 ppm equivalentes de TPHs en río Bogotá y 1,5-3,5 ppm equivalentes en río Meta. También fueron encontradas trazas de glifosato (0,5-4,0 ppb) en áreas aledañas al río Meta. La naturaleza xenobiótica que tiene el plomo hace que su presencia en la sangre de los peces sea un hallazgo anormal, así como la presencia de TPHs y glifosato en algunas de las aguas muestreadas.
Keywords:
Pimelodidae, Trichomycteridae, Contaminantes, Plomo, Colinesterasa (es)
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How to Cite
González M., J., Landines, M. A., Borbón, J., Correal, M. L., Sánchez, C., & Rodríguez, L. (2014). Evaluation of indicators of exposure to contaminants in three species of Colombian catfishes (Pisces: Siluriformes). Biota Colombiana, 15(Supl. 1). Retrieved from https://revistas.humboldt.org.co/index.php/biota/article/view/341
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