Total mercury concentrations in fish from Urrá reservoir (Sinú river, Colombia). Six years of monitoring
Journal Title: Revista MVZ Cordoba - Year 2015, Vol 20, Issue 3
Abstract
Objective. The aim of this study was to monitor the total mercury (T-Hg) concentrations in fish from the Urrá reservoir, after impoundment. Materials and methods. Five fish species at different trophic levels were sampled from 2004 to 2009 and analyzed by cold-vapor atomic absorption spectroscopy for T-Hg concentrations in muscle tissue. Water quality parameters were evaluated. Results. The highest (1.39±0.69 μg/g ww) and lowest (0.15±0.02 μg/g ww) T-Hg concentrations were detected in Hoplias malabaricus (piscivorous) and Cyphocharax magdalenae (iliophagous/detritivorous) respectively, whereas Leporinus muyscorum (omnivorous) had an intermediate level (0.40±0.11 μg/g ww). The organic matter content in the water increased with time and depth, whereas dissolved oxygen and pH decreased. A covariance analysis (with fish length as a covariate) shows a steady increase of T-Hg levels in all the studied species after impoundment. Conclusions. The T-Hg concentrations in the evaluated fish species, increased after impoundment. The water quality variables showed conditions favoring Hg methylation and its biomagnification, this last was evident in the fish food chain of the reservoir.
Authors and Affiliations
José Marrugo-Negrete, Ph. D *| University of Córdoba, Facult of Basic Sciences, Water Applied and Environmental Chemistry Group, Cra 6 # 76-103, Monteria, Colombia.Correspondence: jlmarrugon@hotmail.com, Amado Navarro-Frómeta, Ph. D| Technological University of Izúcar Matamoros. Prolongación Reforma # 168, neighborhood Santiago Mihuacán, Izúcar of Matamoros, México., Javier Ruiz-Guzmán, M. Sc| University of Córdoba, Facult of Basic Sciences, Water Applied and Environmental Chemistry Group, Cra 6 # 76-103, Monteria, Colombia.
Keywords
Related Articles
- EP ID EP3423
- DOI -
- Views 334
- Downloads 20
EFFECT OF WINTER AND SUMMER ON THE REPRODUCTIVE BEHAVIOR OF THE CROSSBRED BULLS
Objective. To evaluate summer and winter effect on the seminal quality of crossbred bulls in the Sinu valley river. Materials and methods. Eight bulls of genetic composition 75% Bos indicus and 25% of Bos taurus, were in...
UTILITY OF EFFECTIVE MICROORGANISMS EM® IN AN AVIAN FARM OF CORDOBA: PRODUCTIVES PARAMETERS AND ENVIROMENTAL CONTROL.
Objective. To evaluate the efficiency of effective microorganisms (EM®), in environmental management and on production and economic parameters of broiler chickens. Materials and methods. A study of type assignment random...
Enterotoxigenic Genes in strains of Staphylococcus spp., isolated from cheese made in Pamplona-Colombia
Objective. To determine the incidence of coagulase-positive strains of enterotoxigenic Staphylococcus in doble crema (double cream) cheese samples produced in Pamplona. Materials and methods. Bacterial isolation was perf...
Relationship between gene polymorphism and milk production traits in Teleorman Black Head sheep breed
Objective. This study is a preliminary step of a larger national program aimed to develop a strategy for “in situ” preservation of Teleorman Black Head sheep population. In this paper we estimated the effect of β-lactogl...
Monitoring rumen environment in finishing Lidia bulls
Objective. The aim of this work was to characterize the changes in rumen pH and temperature in finishing Lidia breed bulls reared on pasture and fed a total mixed ration (TMR). Materials and methods. Five 4-year-old Lidi...