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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

Biomagnification

Βιομεγέθυνση

Βιοσυσσώρευση

Issue date

2010-11-19

Collection

School/Department--School of Sciences and Engineering--Department of Biology--Post-graduate theses

Type of Work--Post-graduate theses

Views

311

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