Effect of Intestinal Tapeworm <i>Clestobothrium crassiceps</i> on Concentrations of Toxic Elements and Selenium in European Hake <i>Merluccius merluccius</i> from the Gulf of Lion (Northwestern Mediterranean Sea)

Torres, Jordi; Eira, Catarina; Miquel, Jordi; Ferrer-Maza, Dolors; Delgado, Eulàlia; Casadevall, Margarida

doi:10.1021/acs.jafc.5b03886

Cited by 15 publications

(8 citation statements)

References 42 publications

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“…The Hg concentrations observed in the present study were consistent with previous results reported in the same organisms from the Adriatic Sea (Storelli and Barone, 2013;Storelli et al, 2007), Farwa Island (Lybian coast; Banana et al, 2016), the Gulf of Lion (Torres et al, 2015;Cresson et al, 2014), the Aegean Sea (Yabanli and Alparslan, 2015), Menorca (Junqué et al, 2017) and deep-sea sites from the Mediterranean basin (Koenig et al, 2013;Naccari et al, 2015).…”

Section: Mercurysupporting

confidence: 93%

Drivers of the accumulation of mercury and organochlorine pollutants in Mediterranean lean fish and dietary significance

Junqué

Garí

Llull³

et al. 2018

Science of The Total Environment

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An integrated assessment of lean fish of commercial value as Hg and organochlorine compound source into the population of the Balearic Islands were reported. Dependences between pollutant concentrations, trophic level, fish species, specimen weight and physical-chemical properties were evaluated. Hg and total DDTs showed highest variability between fish species whereas PCBs and HCB displayed more constant median values. The organochlorine compounds found in highest concentrations were those with highest hydrophobicity, consistently with their higher bioaccumulation potential. These pollutant concentrations were higher in Mediterranean than Atlantic fish. Higher median total DDT and PCBs concentrations were also observed in the third than the second trophic level species. The observed concentrations were below the threshold recommended by the EU for human consumption (75ng/g wet weight). The Hg concentrations were higher in Mediterranean than Atlantic fish, with average values of 1.5μg/g ww and 0.43μg/g ww, respectively. Forty-one percent of the specimens from the Mediterranean and 25% of dusky grouper specimens from the Atlantic Ocean showed Hg concentrations above the EU recommended limits for human consumption, either 0.5μg/g ww or 1μg/g ww. In the third trophic level, a significant dependence between median Hg concentrations and weight of each studied species was observed, which remained significant in specimen weight correlations. Independent species correlations of Hg concentrations vs individual weight generally showed higher concentrations at higher weight. Weight/size of the individuals was therefore an important factor for Hg accumulation but the trend was modulated by a species effect. Extrapolation of the observed Hg concentrations in Mediterranean fish to Provisional Tolerable Weekly Intakes (PTWIs) showed higher intakes than the thresholds recommended by EFSA for adults and children, 110% and 140%, respectively. The estimated PTWIs for MeHg corresponded to 310% and 400% of the recommended threshold values. The PTWI values for organochlorine compounds were lower than those recommended.

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Section: Mercurysupporting

confidence: 93%

Drivers of the accumulation of mercury and organochlorine pollutants in Mediterranean lean fish and dietary significance

Junqué

Garí

Llull³

et al. 2018

Science of The Total Environment

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“…However, the range of elements differed between parasite taxa. The cestodes accumulated primarily elements which are known for their toxicity to many organisms such as Cu and Fe, these results are coincided with Torres et al (2015), Abdel-Gaber et al (2016) and Courtney-Hogue (2016) who reported high accumulation rates of heavy metals in cestode parasites and demonstrated its ability to be used for monitoring purposes. In contrast, nematodes mainly bioconcentrated elements which are part of several enzymes and other macromolecules and which are considered as essential elements such as Cd, Pb, Ni, Mn, Zn and Ca for many organisms, these results agreed with AbdelGhaffar et al (2015) who reported the highest rate of metal uptake by nematode parasites mainly for Cd, Pb, Mn and Zn.…”

Section: Discussionsupporting

confidence: 78%

Morphological re-description of Electrotaenia malapteruri (Cestoda: Proteocephalidae) and Dujardinnascaris malapteruri (Nematoda: Heterocheilidae) infecting the Electric catfish Malapterurus electricus and heavy metal accumulation in host and parasites in relation to water and sediment analysis in Lake Manzala, North Delta, Egypt

Abdel‐Gaber

Abdel-Ghaffar

Shazly

et al. 2017

Acta Parasitologica

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Parasites are one of the most serious limiting factors in aquaculture. The Electric catfish Malapterurus electricus was subjected to study the prevalence and mean intensity of parasitic infections throughout the whole year of 2015. Heavy metals accumulation in host fish and parasites were determined in relation to water quality and sediments of two different sites of Lake Manzala (Manzala and Bahr El-Baqar), Egypt. A total of 100 specimens of Electric catfish were collected and examined for the presence of helminth parasites. Two parasite species were recovered and morphologically identified. These were cestoda Electrotaenia malapteruri and nematode Dujardinnascaris malapteruri. Heavy metal analysis in water and sediments showed that measured heavy metals in Bahr El-Baqar were found in risky levels higher than permissible limits and Manzala site. Sediments were found to contain a higher level of metals than water samples. Heavy metals accumulation in recovered parasites and their host were also determined and showed significantly higher concentrations in parasites compared to their host tissues. According to bioconcentration factors, E. malapteruri showed that highest accumulation rate for all recorded elements up to 302. Essential elements like Cu and Fe were found in significantly higher concentrations in D. malapteruri, whereas E. malapteruri accumulated elements Cd, Pb, Ni, Mn, Zn and Ca to a significantly higher degree. Accordingly, the ratios (C[D.malapteruri]/C[E. malapteruri]) for most essential elements were higher than 0.5. Therefore, fish cestodes can be regarded as useful bio-indicators more than nematodes when evaluating the environmental pollution of aquatic ecosystems by heavy metals.

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“…Such a decrease in metal concentration in the tissues of acanthocephalan-infected fish, due to metal uptake by acanthocephalans, has been reported in several studies (e.g. Sures & Siddall, 1999; Sures et al ., 1999, 2003; Eira et al ., 2009; Brázová et al ., 2015; Torres et al ., 2015; Paller et al ., 2016). However, our study revealed strong negative relationships between metal (Cd or Pb) concentration in tissues of infected fish (intestine, liver, muscle) and S. saudii infrapopulation size, i.e.…”

Section: Discussionmentioning

confidence: 99%

Sclerocollum saudii Al-Jahdali, 2010 (Acanthocephala: Cavisomidae) as a sentinel for heavy-metal pollution in the Red Sea

et al. 2018

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Currently, fish helminth parasites, especially cestodes and acanthocephalans, are regarded as sentinel organisms to elucidate metal pollution in aquatic ecosystems. Here, 34 specimens of the fish Siganus rivulatus were collected in the Red Sea, from a seriously polluted, small lagoon named Sharm-Elmaya Bay, at Sharm El-Sheikh, South Sinai, Egypt; 22 (64.7%) were infected by Sclerocollum saudii (Acanthocephala: Cavisomidae). Thus, 22 natural infrapopulations (26-245 individuals) of this parasite were collected from infected fish. Samples of water and sediments from the bay, samples of muscle, intestine and liver from each fish, and samples from the parasite were taken for analysis of heavy metals (cadmium (Cd) and lead (Pb)). Both Cd and Pb concentrations in sediments were higher than those in water. The concentration of these metals were significantly higher in tissues (intestine, liver and muscle) of non-infected fish than those in infected fish, with Pb concentrations consistently higher than those of Cd, and both were drastically decreased in the order: liver > intestine > muscle. Metal concentrations in this acanthocephalan were much higher than those in its fish host. There were strong negative relationships between metal concentrations in tissues (intestine, liver and muscle) of infected fish and infrapopulation size, and between metal concentrations in the acanthocephalan and its infrapopulation size. These relationships strongly suggest competition for these metals between the fish host and its acanthocephalan parasite, and intraspecific competition among acanthocephalan individuals for available metals in the fish intestine. Bioconcentration factors were relatively high, since the mean Cd concentration in S. saudii was 239, 68 and 329 times higher than those in intestine, liver and muscle tissues, respectively, of its fish host. Also, mean Pb concentration was 55, 13 and 289 times higher than those in these tissues, respectively. The host-parasite system described here seems to be promising for biomonitoring of metal pollution in the Red Sea.

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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)

Cited by 15 publications

References 42 publications

Drivers of the accumulation of mercury and organochlorine pollutants in Mediterranean lean fish and dietary significance

Drivers of the accumulation of mercury and organochlorine pollutants in Mediterranean lean fish and dietary significance

Sclerocollum saudii Al-Jahdali, 2010 (Acanthocephala: Cavisomidae) as a sentinel for heavy-metal pollution in the Red Sea

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