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Changes in zooplankton communities along a mercury contamination gradient in a ...

The main objective of this paper was to evaluate the impact of mercury on the zooplankton communities’ structure and functioning and their bioaccumulation patterns along a contamination gradient in a temperate coastal lagoon. Our results demonstrated that total abundance was not negatively affected by Hg contamination, since the most contaminated areas presented the highest values, being the copepod Acartia ton...

Organochlorine contaminants in different tissues from Platichthys flesus (Pisce...

Polychlorinated biphenyls (PCBs) and hexachlorobenzene (HCB) are organic contaminants that tend to accumulate in fish. Estuaries are exposed to high anthropogenic activities, therefore tending to accumulate more contaminants than the adjacent coastal waters. Platichthys flesus, a fish with high economic value, was analysed for PCBs and HCB along its different age groups, in liver, gills, gonads and muscle. Youn...

PCB bioaccumulationin three mullet species — A comparison study

Polychlorinatedbiphenyls(PCBs)arelipophiliccontaminantsthattendtoaccumulateinorganisms.PCBs weredetectedin Chelon labrosus, Liza aurata and Liza ramada, alongdifferentagegroups. L. ramada presentedthehighestconcentration,anditincreasedwithage,whereas C. labrosus and L. aurata concentration remainedconstant. L. ramada high concentrationcanbeattributedtoitsecologicalniche, since thisspeciesisabletoaccumulatePCBsa...

Análise elementar de sumos e águas

Os frutos e vegetais contêm diversos elementos minerais na sua composição, pelo que a sua ingestão pode melhorar a regulação mineral, reduzir as doenças cardiovasculares e o risco de contrair certos tipos de cancro. Também o crescente consumo de sumos de fruta tem sido associado à redução do risco de contrair vários tipos de cancro [1] e daí o interesse público nestes produtos. Contudo, a equivalência à fruta f...

Sargassum muticum and Osmundea pinnatifida food-grade extracts with antioxidant...

Antibacterial activity of different water based seaweeds extracts against human...

Influence of sex and age on PCBs accumulation in the commercial fish Chelon lab...

Thicklip grey mullet, Chelon labrosus, is an important commercial fish species and has been studied worldwide. However, no recent studies have been made regarding polychlorinated biphenyls (PCBs) in wild C. labrosus. Due to that, the concentration of 13 PCBs congeners was measured in muscles and livers, of males and females, of C. labrosus of different ages, allowing the estimation of PCB bioaccumulation throug...

Introducing "UrbanEnviron@Lisbon 2008" a GIS-platform for environmental and hum...

Environmental assessment of Ni and Cd in topsoil and ground-level dust from urb...

Monomethylmercury behaviour in sediments collected from a mercury-contaminated ...

Surface sediments and sediment cores were collected in a mercury (Hg)- contaminated lagoon, namely Largo do Laranjo – Ria de Aveiro, Portugal and analysed in order to establish the monomethylmercury (MeHg) behaviour in this kind of environment. In surface sediments, this compound was only detected in one place (13.2 ng g-1 (dry weight)). In this site, it was determined one of the lowest redox potentials (22 mV)...