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| Main Authors: | , , , , |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Marine pollution bulletin
2026
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| Online Access: | https://pubmed.ncbi.nlm.nih.gov/42172917/ |
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Table of Contents:
- Organochlorine contamination in common and rare fish species of the Crimean coastal waters (Black Sea). Malakhova, L Tamoikin, I Voitsekhovskaya, V Malakhova, T Vdodovich, I Organochlorine compounds (OCs) remain persistent pollutants in semi-enclosed seas like the Black Sea, where limited water exchange promotes their accumulation. This study provided the first assessment of OCs contamination in four poorly studied teleost fish species from Crimean coastal waters: demersal brown meagre (Sciaena umbra), benthopelagic sharpsnout seabream (Diplodus puntazzo), benthopelagic European hake (Merluccius merluccius), and the invasive demersal Korean rockfish (Sebastes schlegelii). DDTs, HCHs, HCB, and six indicator PCBs were quantified in liver, gonads, muscle, and visceral fat using gas chromatography with a micro-electron capture detector (GC-μECD). Analytical quality was assured by calibration curves with R ≥ 0.995, confirmation by GC-MS, and successful participation in the IAEA interlaboratory exercise. OCs were detected in all samples with marked interspecific and tissue-specific variability. The highest concentrations on a wet weight basis were found in Korean rockfish (252 ng/g ΣDDT and 651 ng/g ΣPCB in liver). The contamination profile was dominated by p,p'-DDE and highly chlorinated PCBs (101, 138, 153), indicating aged pollution inputs. β-HCH and HCB were detected only in European hake, suggesting a distinct contamination pathway, potentially linked to Mediterranean migration. OCs concentrations exceeded open-ocean background levels by one to two orders of magnitude but remained below the Eurasian TR CU food safety limits for marine fish (ΣDDT ≤200 ng/g ww, ΣPCB ≤2000 ng/g ww). Notably, in native brown meagre, visceral fat contained 35 times lower PCBs than muscle (93 vs. 3259 ng/g lipid). Our results demonstrate that legacy OCs continue to circulate in the Black Sea ecosystem despite decades-long bans. The biological characteristics of the expanding M. merluccius and the invader S. schlegelii, as distinct from those of allochthonous species such as D. puntazzo and S. umbra, necessitate monitoring of pollutant accumulation processes, because new species can alter the established chains of matter and energy transfer in the ecosystem.