Total mercury and selenium concentrations in Sarpa salpa and Balistes capriscus and in their respective Digenean endoparasites Robphildollfusium fractum and Neoapocreadium chabaudi from Tunisia

  title={Total mercury and selenium concentrations in Sarpa salpa and Balistes capriscus and in their respective Digenean endoparasites Robphildollfusium fractum and Neoapocreadium chabaudi from Tunisia},
  author={Jordi Torres and Hichem Kacem and Catarina Eira and Lass{\^a}d Neifar and Jordi Miquel},
  journal={Acta Parasitologica},
The present study reports the levels of mercury and selenium in Sarpa salpa and Balistes capriscus collected along the coast of Mahdia and Sfax (Tunisia). The systems constituted by S. salpa and Robphildollfusium fractum and by B. capriscus and Neoapocreadium chabaudi were tested as potential bioindicators to monitor environmental Hg pollution in marine ecosystems. Mercury and selenium concentrations were assessed in kidney, liver and muscle of 51 S. salpa and of 45 B. capriscus as well as in… Expand
Effect of Intestinal Tapeworm Clestobothrium crassiceps on Concentrations of Toxic Elements and Selenium in European Hake Merluccius merluccius from the Gulf of Lion (Northwestern Mediterranean Sea).
Values indicate that the edible part of infested hake presents a lower amount of Cd and Pb in relation to noninfested hakes, and the muscular Se:Hg molar ratio in the infested subsample was higher than that in hakes without cestodes. Expand
Patterns of distribution and accumulation of trace metals in Hysterothylacium sp. (Nematoda), Phyllodistomum sp. (Digenea) and in its fish host Hoplias malabaricus, from two neotropical rivers in southeastern Brazil.
It is found that uninfected fish had statistically higher concentrations of metals than infected ones, and in those who are infected, the size of the parasitic infrapopulations correlated negatively with the concentrations of trace metals obtained in the hosts tissues, that is, the concentrations in fish showed a tendency to decrease as the parasiticinfrapopulation increased, or vice versa. Expand
Environmental Parasitology: intestinal helminth parasites of the siganid fish Siganus rivulatus as bioindicators for trace metal pollution in the Red Sea
Of the present three host–parasite systems, only the Siganus rivulatus–Sclerocollum rubrimaris system seems to be promising for biomonitoring of metal pollution in the Red Sea. Expand
Trace element and metal sequestration in vitellaria and sclerites, and reactive oxygen intermediates in a freshwater monogenean, Paradiplozoon ichthyoxanthon
Se sequestration of trace elements and reactive oxygen intermediate production in the monogenean, Paradiplozoon ichthyoxanthon, was demonstrated and the results suggest either trace element accumulation takes place across the tegument or results from the action of the host’s immune response on the parasite. Expand
Parasites and pollution: the effectiveness of tiny organisms in assessing the quality of aquatic ecosystems, with a focus on Africa
Overall, parasites from African freshwater and marine ecosystems have merit as effect and accumulation indicators; however, more research is required to detail the effects of exposure on sensitive biological processes within these organisms. Expand
Parasite responses to pollution: what we know and where we go in ‘Environmental Parasitology’
The suitability of parasites as accumulation indicators and their possible application to demonstrate biological availability of pollutants; the role of parasite as pollutant sinks; the interaction between parasites and biomarkers focusing on combined effects of parasitism and pollution on the health of their hosts; and the use of parasitesAs indicators of contaminants and ecosystem health are addressed. Expand


Trace element concentrations in Proteocephalus macrocephalus (Cestoda) and Anguillicola crassus (Nematoda) in comparison to their fish host, Anguilla anguilla in Ria de Aveiro, Portugal.
Eel consumption in Ria de Aveiro represents no risk for humans although they may represent a real contamination risk for wildlife, and Anguilla anguilla is proposed as another promising bioindicator system to evaluate environmental Cr, Ni, Pb and Zn exposure in estuarine areas where both species co-occur. Expand
Mercury contamination in human hair and some marine species from Sfax coasts of Tunisia: levels and risk assessment
The key findings were: (1) the mercury contents of the examined fish and seafood species frequently exceeded the regulatory guideline value of 0.5 mg/kg, (2) no site-specific differences in hair mercury contents were found, and (3)Fish and seafood consumption is probably the major contributor of mercury exposure in this population. Expand
Accumulation of some heavy metals in Hysterothylacium aduncum (Nematoda) and its host sea bream, Sparus aurata (Sparidae) from North-Eastern Mediterranean Sea (Iskenderun Bay)
The sea bream’s nematode and Sparus aurata, sampled from the Iskenderun Bay, Mediterranean, in March 2008 were analyzed by inductively coupled plasma–atomic emission spectrometry for their some heavyExpand
Competition for minerals between Acanthocephalus lucii and its definitive host perch (Perca fluviatilis).
  • B. Sures
  • Biology, Medicine
  • International journal for parasitology
  • 2002
It emerged that not only is there competition for essential elements between acanthocephalans inside the gut but there is also competition for these elements between the host and its parasites. Expand
Antagonistic interaction of mercury and selenium in a marine fish is dependent on their chemical species.
Basic biokinetic measurements revealed that Se had direct interaction with Hg(II) during dietary assimilation rather than with MeHg and that different Se species had variable effects on Hg assimilation. Expand
Accumulation of heavy metals by intestinal helminths in fish: an overview and perspective
  • B. Sures
  • Medicine, Biology
  • Parasitology
  • 2003
This review summarises the present knowledge about parasites as bioindicators and compares the accumulation properties of parasites and established free living indicators, and presents possible answers to the question why it could be advantageous to have new and even more sensitive indicators for environmental monitoring purposes. Expand
Toxic metal (Pb, Cd, As and Hg) and organochlorine residue levels in hake (Merluccius merluccius) from the Marmara Sea, Turkey
Toxic metal and organochlorine residue levels of fish are significantly higher than levels from the Mediterranean Sea and the high levels of o,p and p,p DDD compounds, which are metabolites of DDT, indicate its illegal use. Expand
Heavy metals in fish (Solea vulgaris, Anguilla anguilla and Liza aurata) from salt marshes on the southern Atlantic coast of Spain.
Comparisons were made of metal concentrations in water and sediment with those in the muscle and livers of three species of fish caught in four seawater reservoirs, finding high metal-enrichment factors in the livers as compared to muscle. Expand
Mercury and Selenium - A Review on Aspects Related to the Health of Human Populations in the Amazon.
The literature supports the notion that low environmental Se is linked to susceptibility to Hg toxicity and that Se levels could be used as a bioindicator to monitor the health of Hg exposed subjects, but further epidemiological studies are needed to clarify how changes in Se levels modify the toxicity of environmental Hg. Expand
Selenium/mercury molar ratios in freshwater, marine, and commercial fish from the USA: variation, risk, and health management
It is suggested that relying on the Se/Hg molar ratio as a method of predicting reduced risk from Hg toxicity is problematic because of the great variation among and within fish species, and the variation is not predictable because Hg varies by season, size of the fish, and location of the Fish (which is not available for commercial fish). Expand