Niveles de cadmio en peces de alto consumo en aguas continentales en la provincia de Los Ríos
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2019-09
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Facultad de Ciencias Naturales. Universidad de Guayaquil
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La investigación se realizó en cuatro puntos en los ríos del Cantón Babahoyo, Provincia de los Ríos, Ecuador en el cual se determinó la concentración de Cd en el hígado y músculo de H. microlepis y P. bolengeri. La concentración del metal en el tejido muscular de ambas especies fue menor al límite de cuantificación del método (<0,014 mg/Kg). La mayor concentración de Cd en hígado se observó en la especie P. boulengeri (0,63±0,188 mg/kg) y la menor concentración en H. microlepis (0,003±0,036 mg/kg), existen diferencias significativas en la concentración de Cd de los hígados de ambas especies (F= 33,74; p= 0,000). Letras diferentes indican diferencias significativas según ANOVA de una vía y test a posteriori de Tukey (p<0,05). La concentración de Cd en hígado se encontró por encima del límite máximo permisible (0,05 mg/Kg) establecido por la Unión Europea. La correlación entre peso y talla fue directamente proporcional entre si (r=0,963; p=0,000) la concentración de Cd en hígado fue inversamente proporcional a la talla y peso y la madurez sexual se presentó directamente proporcional a la concentración de Cd (r=0,880; p=0,000).
The research was carried out at four points in the rivers of the Babahoyo Canton, Province of Los Ríos, Ecuador in which the concentration of Cd in the liver and muscle of H. microlepis and P. bolengeri was determined. The metal concentration in the muscle tissue of both species was lower than the quantification limit of the method (<0.014 mg / kg). The highest concentration of Cd in the liver was observed in the species P. boulengeri (0.63 ± 0.188 mg / kg) and the lowest concentration in H. microlepis (0.003 ± 0.036 mg / kg), there are significant differences in the concentration of Cd of the livers of both species (F = 33.74; p = 0.000). Different letters indicate significant differences according to one-way ANOVA and a posterior test of Tukey (p <0.05). The concentration of Cd in liver was found above the maximum permissible limit (0.05 mg / Kg) established by the European Union. The correlation between weight and height was directly proportional to each other (r = 0.963; p = 0.000) the concentration of Cd in the liver was inversely proportional to height and weight and sexual maturity was directly proportional to the concentration of Cd (r = 0.880; p = 0.000).
The research was carried out at four points in the rivers of the Babahoyo Canton, Province of Los Ríos, Ecuador in which the concentration of Cd in the liver and muscle of H. microlepis and P. bolengeri was determined. The metal concentration in the muscle tissue of both species was lower than the quantification limit of the method (<0.014 mg / kg). The highest concentration of Cd in the liver was observed in the species P. boulengeri (0.63 ± 0.188 mg / kg) and the lowest concentration in H. microlepis (0.003 ± 0.036 mg / kg), there are significant differences in the concentration of Cd of the livers of both species (F = 33.74; p = 0.000). Different letters indicate significant differences according to one-way ANOVA and a posterior test of Tukey (p <0.05). The concentration of Cd in liver was found above the maximum permissible limit (0.05 mg / Kg) established by the European Union. The correlation between weight and height was directly proportional to each other (r = 0.963; p = 0.000) the concentration of Cd in the liver was inversely proportional to height and weight and sexual maturity was directly proportional to the concentration of Cd (r = 0.880; p = 0.000).
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CADMIO, PECES DE AGUAS CONTINENTALES, VARIACIONES BIOMÉTRICAS, HOPLIAS MICROLEPIS, PSEUDOCURIMATA BOULENGERI