Long term trends of Hg uptake in resident fish from a polluted estuary.
Mar Pollut Bull
; 73(1): 263-72, 2013 Aug 15.
Article
en En
| MEDLINE
| ID: mdl-23809330
Mercury contamination of fish is dependent upon a system's ability to transform inorganic Hg into biologically available forms; however, fish biometrics also play an important role. To assess long term trends in Hg concentrations in sand flathead (Platycephalus bassensis) a polynomial model, corrected for fish length, was used to evaluate temporal trends and spatial variability, while growth rates were estimated using the Von Bertalanffy length-at-age model. Hg concentrations showed no decrease over time, and generally remained near recommended consumption levels (0.5 mg kg(-1)). Previously reported spatial differences in Hg concentrations were not supported by the data once the models were corrected for fish length. Growth rate variation accounted for a large part of the previously published spatial differences. These results suggest that inclusion of fish biometrics is necessary to facilitate an accurate interpretation of spatial and temporal trends of contaminant concentrations in long term estuarine and marine monitoring programs.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Contaminantes Químicos del Agua
/
Monitoreo del Ambiente
/
Peces
/
Mercurio
Límite:
Animals
Idioma:
En
Revista:
Mar Pollut Bull
Año:
2013
Tipo del documento:
Article
País de afiliación:
Australia
Pais de publicación:
Reino Unido