Heavy metal concentrations in sharks, rays and chimaeras from the western Mediterranean Sea

Carrasco-Puig, Pol; Colmenero, Ana I.; Ruiz-García, David; Molera-Arribas, Alejandro J.; Hernández-Martínez, Ana M.; Raga, Juan A.; Barría, Claudio

doi:10.1016/j.marpolbul.2023.115942

Cited by 7 publications

(1 citation statement)

References 64 publications

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“…Data on metal levels are for the first time reported herewith for the species O. ferox and H. nakamurai, whereas for O. centrina and A. supercilliosus, available data are scarce [30,31] (Table S1). The M. mobular (WD = 285 cm) sample, a species for which data are rare for the Mediterranean [32], which remains severely understudied (especially concerning metal evaluations) [33], exhibited the highest concentrations of Fe, Zn, As and Cs in the muscle tissue and of V in the gills.…”

Section: Trace Metals Concentrationsmentioning

confidence: 99%

Trace Metals Distribution in Tissues of 10 Different Shark Species from the Eastern Mediterranean Sea

Roubie,

Karavoltsos,

Sakellari

et al. 2024

Fishes

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As long-living apex predators, sharks tend to bioaccumulate trace metals through their diet. The distribution of Al, As, Cd, Co, Cr, Cs, Cu, Fe, Mn, Ni, Pb, V, Zn and Hg in different tissues (muscle, liver, heart, gills and gonads) of large-size (58–390 cm) sharks, some of which rare, of the eastern Mediterranean Sea was studied. Trace metals analyses in samples originating from ten different Chondrichthyes species were performed by inductively coupled plasma–mass spectrometry (ICP-MS) and Cold Vapor Atomic Absorption Spectrometry (CVAAS) for Hg. Data on trace metal levels are for the first time reported herewith for the species O. ferox and H. nakamurai. Higher median concentrations of trace metals were generally determined in the liver. The concentrations of Hg, Cs and As in the muscle increased proportionally with body length. Statistically significant differences between sexes were recorded for Hg, Cr, Ni and As (p = 0.015) in the muscle tissues of P. glauca. Muscle tissue Hg concentrations exceeded the EU maximum limit (1 μg g−1 wet weight) in 67% of the individuals sampled, with the highest concentrations detected in O. ferox and S. zygaena, whereas regarding Pb (limit 0.30 μg g−1 ww), the corresponding percentage was 15%. Arsenic concentrations were also of concern in almost all shark tissues examined.

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