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 384
- Downloads 20
RESTRICCIÓN DEL AMAMANTAMIENTO EN VACAS DEL SISTEMA CRÍA LIBRE
In order to increase the pregnancy rate which it was found diminished by the incidence of a long anoestrus postpartum in lactating cows in the farm Andalucía, the technology or «restriction of the suckling period to 30 m...
Evaluation of three protocols for hormonal induction of spermiation in yaque Leiarius marmoratus
Objective. To assess the effects of hormonal induction using pituitary carp extract (PCE) and sGnRHa + domperidone (OVA) on the release of seminal fluid and its characteristics. Materials and methods. Treatments were: T1...
ENVIRONMENTAL FACTORS THAT AFFECT THE AGE OF FIRST CALVING AND CALVING INTERVAL IN COWS UNDER THE DOUBLE-PURPOSE SYSTEM
Objective. To determinate the factors that influence the age at first calving (AFC) and first calving interval (FCI) in female cows under the double purpose system on the farm “Rodeo”, municipality of Magangué, Bolivar,...
RAPID DNA EXTRACTION AND PCR VALIDATION FOR DIRECT DETECTION OF Listeria monocytogenes IN RAW MILK
Objective. The aim of this study was to validate a method for detecting L. monocytogenes in raw milk. Materials and methods. The extraction procedure carried out using a chaotropic agent like NaI, to reduce fat in the sa...
Efficiency of superovulatory response to P-24 protocol in fixed time embryo transfer in Brahman cattle
Objective. To evaluate the efficiency of superovulatory response to P-24 protocol in fixed time embryo transfer in Brahman cattle. Materials and methods. Twelve Brahman cows donors with more than 60 days postpartum were...