RESUMEN
El objetivo de este estudio fue evaluar el desarrollo testicular y describir la calidad del parénquima testicular de machos cabríos alimentados con pasto, maíz molido y agua obtenidos de campos contaminados con residuos de minería. Se evaluó la concentración de plomo, arsénico y cadmio en sangre y tejido testicular, así como otros indicadores como testosterona, el parénquima testicular, la concentración espermática y porcentaje de espermatozoides malformados. Se encontró mayor concentración de cadmio (Cd) en el parénquima testicular, posiblemente debido a la mayor capacidad de bioacumulación de este metal. El promedio de concentración de testosterona fue de 0.16 mg/dL. El parénquima testicular presentó vacuolización del citoplasma, degeneración del epitelio germinativo con escasas células de Sertoli y Leydig, así como ausencia de espermatogénesis y espermatozoides. La concentración espermática estuvo por debajo de lo reportado como normal. La concentración de espermatozoides y testosterona pudo variar debido a un bajo conteo de células de Leydig y Sertoli. El consumo de alimento y agua contaminados con residuos de minería, permiten que metales pesados como cadmio y arsénico se acumulen en los testículos afectando negativamente el parénquima testicular, pero no el tamaño testicular. (AU)
The aim is to evaluate the testicular development and described the quality of the testicular parenchyma of male goats consuming grass, ground corn and water obtained from fields contaminated with mining residues. The concentration of lead, arsenic and cadmium in blood and testicular tissue was evaluated as well as other indicators such as testosterone concentration, testicular parenchyma, sperm concentration and abnormalities sperm. A higher concentration of cadmium (Cd) were found in the testicular parenchyma, possibly due to the increased bioaccumulation capacity of this metal. The average testosterone concentration was 0.16 mg/dL. The testicular parenchyma presented vacuolization of the cytoplasm degeneration of the germinative epithelium with few Sertoli and Leydig cells, as well as absence of spermatogenesis and spermatozoa. The sperm concentration was below that was reported as normal. The concentration of sperm and testosterone could vary due to a low number of Sertoli and Leydig cells. The intake of food and water contaminated with mining residues, allow heavy metals such as cadmium and arsenic to accumulate in the testicles negatively affect testicular parenchyma, but not testicular size in male goats. (AU)
Asunto(s)
Animales , Masculino , Metales Pesados , Testículo , Testosterona , CabrasRESUMEN
Rare earth elements (REE) were used to assess attenuation processes in a passive system for acid mine drainage treatment (Jales, Portugal). Hydrochemical parameters and REE contents in water, soils and sediments were obtained along the treatment system, after summer and winter. A decrease of REE contents in the water resulting from the interaction with limestone after summer occurs; in the wetlands REE are significantly released by the soil particles to the water. After winter, a higher water dynamics favors the AMD treatment effectiveness and performance since REE contents decrease along the system; La and Ce are preferentially sequestered by ochre sludge but released to the water in the wetlands, influencing the REE pattern of the creek water. Thus, REE fractionation occurs in the passive treatment systems and can be used as tracer to follow up and understand the geochemical processes that promote the remediation of AMD.