89 research outputs found
European eels and heavy metals from the Mar Menor lagoon (SE Spain)
the levels of lead (Pb), cadmium (Cd) and mercury (Hg), all known to be harmful heavy metals, in European eels from the Mar Menor lagoon were investigated. On the other hand, the dietary selenium (Se) status is highly related to Hg toxicity (Ralston
and Raymond, 2010), and the antagonist effect of Se on Hg is well known since many years ago. The molar ratio Se:Hg may provide an accurate index of risk from fish consumption, and the Selenium Health Benefit Value (HBVSe, Ralston et al., 2016) has been recently considered as a good instrument to better understand of the Se available that remains after its interaction with Hg. Thus, due to the importance of factors affecting public health, information regarding Se concentrations, Se:Hg ratio and the HBVSe were also analysed.Heavy metal pollution is related to the fall in European eel (Anguilla anguilla) populations. The Mar Menor
lagoon (SE Spain) is home to an endangered population of this species, which is still caught for human consumption.
The presence of Pb, Cd and Hg in the livers and muscles and the Se:Hg ratio in muscle of 150 eels from
this lagoon were determined. Pb concentrations were higher than those reported from other populations in the world, while Cd and Hg concentrations in the tissues analysed were lower. In terms of food safety, Se concentrations play an important role in sequestering Hg in eels from this lagoon.This work was supported by âPrograma de Apoyo a la InvestigaciĂłnVersiĂłn del editor2,35
Rentabilité sociale des plans de gestion
Diffusion du document : INRA UnitĂ© d'Economie et Sociologie rurales Rue Adolphe Bobierre CS 61103 35011 Rennes Cedex (FRA)En France, la gestion de la pĂȘche en eau douce est gĂ©nĂ©ralement confiĂ©e aux associations de pĂȘcheurs. RegroupĂ©es en fĂ©dĂ©rations dĂ©partementales, ces associations agissent sous le contrĂŽle pour la protection du milieu aquatique et le dĂ©veloppement de la pĂȘche. Le Conseil supĂ©rieur de la pĂȘche (CSP) a dĂ©veloppĂ© une mĂ©thode synthĂ©tique d'Ă©laboration des plans de gestion piscicole. Depuis 1995, plus de la moitiĂ© des dĂ©partements français s'est engagĂ©e dans ce programme avec l'aide technique et financiĂšre du CSP. La dĂ©marche est centrĂ©e sur l'exploitation du potentiel de production naturelle en poissons sauvages. On chiffre le montant des travaux Ă rĂ©aliser pour restaurer les fonctionnalitĂ©s du milieu et mettre en place une gestion patrimoniale. Un calcul coĂ»t/bĂ©nĂ©fice, prenant en compte la valeur particuliĂšre du poisson sauvage par rapport au poisson alevinĂ©, permet d'Ă©valuer la rentabilitĂ© sociale des plans de gestion dans l'Indre et l'HĂ©rault, deux dĂ©partements oĂč les situations Ă©cologiques et halieutiques sont contrastĂ©es
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