INVESTIGADORES
MALANGA Gabriela Fabiana
artículos
Título:
Seasonal and pollution-induced variations in biomarkers of transplanted mussels within the beagle channel
Autor/es:
GIARRATANO E; GIL M; MALANGA G
Revista:
MARINE POLLUTION BULLETIN
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2011 vol. 62 p. 1337 - 1344
ISSN:
0025-326X
Resumen:
The occurrence of biomarker variations linked to environmental factors makes it difficult to distinguish
the effect of pollution. In an attempt to evaluate spatial and seasonal effects of environmental parameters
on biomarker responses, mussels Mytilus edulis chilensis coming from an aquaculture farm were transplanted
to several points within Ushuaia Bay (Beagle Channel) for 6 weeks in summer and winter. Activities
of superoxide dismutase, catalase, glutathione-S-transferase and levels of lipid peroxidation were
measured in gills and digestive gland. Cu, Zn, Fe, Cd and Pb concentrations were also assessed. Results
indicated a significant effect of seasons on biological responses as well as in metal bioaccumulation
showing the influence of natural factors such as dissolved oxygen, temperature and food availability.
The interdependence of those environmental factors is important for the homeostasis of thermoconformers,
especially regarding their oxidative metabolism and should also be taken into consideration to distinguish
natural from pollution-induced variations.