The Ria Formosa lagoon is an ecosystem whose water quality reflects the anthropogenic influence upon the surrounding areas. In this lagoon, the clam Ruditapes decussatus has a great economical importance and has been widely used as a biomonitor. A multibiomarker approach (d-aminolevulinic acid dehy- dratase, metallothionein, lipid peroxidation, acetylcholinesterase, alkali-labile phosphates, DNA damage) was appli...
Aquatic Toxicology 63 (2003) 307-318 ; Metallothioneins (MT) were obtained after purification from metal-exposed clams (Ruditapes decussatus) using gelpermeation and ion-exchange chromatography. Four cadmium /metallothioneins (CdMTs) were resolved by ionexchange chromatography and they all had similar molecular weights, high cadmium content and an absorption spectra indicative of the presence of characteristic...
No artigo são enunciados alguns dos desafios que o século XXI apresenta em termos da poluição dos oceanos, muito em particular da zona costeira. São referidas algumas fontes de contaminação das águas, que constituem outras tantas ameaças: lançamento ao mar de metais pesados, acidentes com petroleiros, acidentes em centrais nucleares. São igualmente mencionados os efeitos de grandes perturbações ambientais, o de...
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