Accumulation of some heavy metals in Hysterothylacium aduncum (Nematoda) and its host sea bream, Sparus aurata (Sparidae) from North-Eastern Mediterranean Sea (Iskenderun Bay)

Abstract

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 heavy metal (Cd, Cr, Cu, Fe, Hg, Mn, Mg, Pb, and Zn) levels. The metal concentrations of the parasites were compared to different organs (liver, muscle, gill, intestine, and skin) of the fish hosts. There were significant differences in Cd, Cr, Cu, Fe, Mn, Zn, Hg, Mg, and Pb concentrations in tissues of fish and its parasite. The parasite Cd, Cu, and Pb concentration was higher than the other tissues. Furthermore, significant differences were detected in the heavy metal accumulations between the parasitized and unparasitized fish tissues in Cd, Cu, Hg, and Pb concentrations. The Cd, Hg, and Pb concentrations were found in fish muscle at mean concentrations over the permissible limits proposed by the Food and Agriculture Organization.

Molecular identification of Hysterothylacium aduncum specimens isolated from commercially important fish species of Eastern Mediterranean Sea using mtDNA cox1 and ITS rDNA gene sequences

“…In the literature, Hysterothylacium aduncum has been reported from the Northeastern Atlantic [8,9], the Mediterranean Sea [10][11][12][13][14][15][16][17][18], the Black Sea [19], the Adriatic Sea [20], the Pacific and Atlantic waters of North America [21,22], Northwest Pacific, [23] and the Pacific Ocean costs of Japan [24].…”

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

“…Acanthocephalans are presently recognized for their excellent metal accumulation capacities in both field and experimental conditions and adult cestodes as well as nematodes also seem to be promising bioindicators for some toxic elements (Eira et al 2009;Dural et al 2011). However, there is no data concerning adult trematodes parasites of fish.…”

Updates on Aquatic Parasites in Fisheries: Implications to Food Safety, Food Security and Environmental Protection

“…Several studies have shown significantly higher quantity of heavy metal accumulation in tissues of endoparasites than their final hosts [8,9,91]. Among these is the higher concentration of lead and cadmium in Monobothrium wageneri and Bothriocephalus scorpil (cestodes) from the intestine of tench (Tinca tinca) and turbot (Scophthalmus maximus) than in the muscle, liver, and intestine of their fish host [3,4], and higher lead, cadmium, and cupper in Hysterothylacium aduncum (nematode) than its host sea bream (Sparus auratus) [91].…”

“…Among these is the higher concentration of lead and cadmium in Monobothrium wageneri and Bothriocephalus scorpil (cestodes) from the intestine of tench (Tinca tinca) and turbot (Scophthalmus maximus) than in the muscle, liver, and intestine of their fish host [3,4], and higher lead, cadmium, and cupper in Hysterothylacium aduncum (nematode) than its host sea bream (Sparus auratus) [91]. Also, there were reports on an elevated selenium concentration in the cestode B. acheilognathi in comparison to the tissues of its fish definitive host [92].…”