Toxic metal (Pb, Cd, As and Hg) and organochlorine residue levels in hake (Merluccius merluccius) from the Marmara Sea, Turkey


Aksu A. , Balkis N. , Taskin O. S. , Ersan M. S.

ENVIRONMENTAL MONITORING AND ASSESSMENT, cilt.182, ss.509-521, 2011 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 182
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1007/s10661-011-1893-1
  • Dergi Adı: ENVIRONMENTAL MONITORING AND ASSESSMENT
  • Sayfa Sayıları: ss.509-521

Özet

Toxic metals (Pb, Cd, As and Hg) and organochlorine residue levels were measured in hake (Merluccius merluccius) from the Marmara Sea. Biota samples were collected by a trawling cruise of the R/V ARAR in August and December 2009. The concentrations of toxic metals varied between Pb, 3.23-14.4; Cd, < 0.01-2.14; Hg, 0.01-0.18 and As, 0.01-0.21 mu g g (-aEuro parts per thousand 1), UNEP 1985). In contrast, As and Hg levels were found to be lower than the critical limits for two periods. Cd contents of fish from the Marmara Sea were also comparable to or slightly lower than contents of fish from the Southern Black Sea Shelf. The results of organochlorine residues ranged between total HCH, < 0.05 and 99 ng g (-aEuro parts per thousand 1); endrin, < 0.001 and 381 ng g (-aEuro parts per thousand 1); alpha-endosulphan, < 0.05 and 90 ng g (-aEuro parts per thousand 1); beta-endosulphan, < 0.05 and 15.3 ng g (-aEuro parts per thousand 1); o,p DDE, 3.5 and 52.4 ng g (-aEuro parts per thousand 1); p,p DDE, 7.4 and 139 ng g (-aEuro parts per thousand 1); o,p DDD, 1.5 and 90.2 ng g (-aEuro parts per thousand 1) and p,p DDD, 2.7 and 86 ng g (-aEuro parts per thousand 1) wet weight. The rivers for the distribution of organochlorine levels in the Marmara Sea ordered from highest to lowest as Dil R. > Susurluk R. > Biga R. > Gonen R. The high levels of o,p and p,p DDE, and o,p and p,p DDD compounds, which are metabolites of DDT, indicate its illegal use. Toxic metal and organochlorine residue levels of fish are significantly higher than levels from the Mediterranean Sea.