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Identifier 000361534
Title Heavy metals in tissues of demersal fish from the Thermaikos Gulf : detection of changes with trophic level
Alternative Title Μέτρηση βαρέων μετάλλων σε βενθικά είδη ψαριών του Θερμαϊκού κόλπου
Author Βέτση, Ευανθία
Thesis advisor Καρακάσης, Ιωάννης
Παυλίδης, Μιχάλης
Σωμαράκης, Στυλιανός
Abstract Heavy metals were investigated in twenty-nine demersal marine fish species collected by trawl from the Thermaikos Gulf. Metal concentrations were analyzed in the muscle, gills, liver, skin and scales. Metals accumulated mostly in the gills, followed by the liver and finally the muscle. Patterns of biomagnification were evident in this demersal food web for some species and metals. Concentrations of some metals in the edible portion of the fish exceeded limits provided by food safety authorities. The presence of contaminants in the sediment and water of the gulf of the Thermaikos could be potential contributors to the accumulation of metals in fish species. The degree to which accumulation occurs is dependent on fish swimming activity, feeding behaviour, physiology, and water quality.
Language English
Subject Bioaccumulation
Issue date 2010-11-19
Collection   Faculty/Department--Faculty of Sciences and Engineering--Department of Biology--Post-graduate theses
  Type of Work--Post-graduate theses
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