Macro- and microelements in eel (Anguilla anguilla) from the northern regions of Poland

• Autorzy: Polak-Juszczak L. , Robak S.
• Języki publikacji: EN

Abstrakty

EN

The abundance of the eel (Anguilla anguilla) in Europe has been on the decline in recent years, to the extent that this fish species is now considered to be threatened with extinction. Hence, the current implementation of the Eel Management Plan in Poland, whose aim is to restore w stocks of this fish. The main natural habitats of eel are the transitional waters of the Vistula and Szczecin lagoons and lakes in northern Poland. The eel is highly valued by many consumers for the taste and texture of its meat. The aim of the study was to determine differences in concentrations of macro- and microelements and toxic metals in muscles of the eel as a function of each specimen’s length, mass and the origin. The results of the study also served an evaluation of the health benefits and risks to consumers of eel meat with regard to the content of macro- and microelements and toxic metals. Specimens of the eel (Anguilla anguilla) were caught in 2011-2013, in five regions of Poland: the southern Baltic, inland lakes in northeast Poland, the Vistula and Szczecin lagoons, and in the Vistula River. The concentrations of Ca, P, Mg, Na, K, Fe, Sr, Zn and As were determined with optical emission spectrometry. The flameless atomic absorption spectrometry method was used to measure concentrations of Cu, Cd and Pb. The content of Hg and Se were determined with atomic absorption, those of mercury with cold vapour, and of selenium with hydride generation. The concentrations of macro- and microelements in most instances, with the exception of P and Zn, were negatively correlated with the eel’s length and mass, which indicated that small fish contained more minerals than large specimens. The eel is a rich source of phosphorus, zinc, selenium and iron, and it can supply significant quantities of the daily requirements of human consumers for these minerals. The other minerals occurred in eel muscle at levels that ranged from 2 to 6% of human daily requirements. Among the toxic metals, mercury was the cause for concern, while cadmium and lead occurred at low levels in all of the specimens examined regardless of their size. The mean concentration of mercury ranged from 0.147 to 0.273 mg kg-1 and was positively correlated with specimen length and mass. The content of mercury in large eel exceeded 0.500 mg kg-1, while small eel (up to 70 cm) contained lower levels of mercury. Large eel exceeding 70 cm can pose a threat to the consumer’s health because of mercury, and especially its organic from of methylmercury. This is why consumers should limit long-term consumption of larger eel, while it is safe to consume smaller specimens since they contain less mercury and more minerals than do large eel.

Słowa kluczowe

EN

macroelement; microelement; eel; Anguilla anguilla; Northern Poland; Poland

• Wydawca: -
• Czasopismo: Journal of Elementology
• Rocznik: 2015
• Tom: 20
• Numer: 2
• Opis fizyczny: p.385-394,ref.

Twórcy

autor

Polak-Juszczak L.

• Department of Food and Environmental Chemistry, National Marine Fisheries Research Institute, Kollataja 1, 81-332 Gdynia, Poland

autor

Robak S.

• Department of Ichthyology, Inland Fisheries Institute in Olsztyn, Olsztyn, Poland

Bibliografia

• Barska I., Skrzynski I. 2003. Contents of methylmercury and total mercury in Baltic Sea fish and fish products. Bull. Sea. Fish. Inst., 3(160): 3-16.
• Brucka-Jastrzębska E, Kawczuga D, Rajkowska M, Protasowicki M. 2009. Levels of microelements (Cu, Zn, Fe) and macroelements (Mg, Ca) in freshwater fish. J Elem., 14(3): 437-447.
• Burger J., Gaines K.F., Boring C.S., Step hens Jr. W.L., Snodgrass J., Gochfeld M. 2001. Mercury and selenium in fish from the Savannah River: species, trophic level, and location differences. Environ. Res., 87: 108-118.
• Durrieu G., Maury-Breachet R., Girardin M., Rochard E., Boude u A. 2005. Contamination by heavy metals (Cd, Zn, Cu, and Hg) of eight fish species in the Gironde estuary (France). Estuaries, 28: 581-591.
• EFSA 2009. Cadmium in food Scientific Opinion of the Panel on Contaminants in the Food Chain. EFSA J., 980: 1-139.
• http://www.efsa.europa.eu/en/efsajournal/doc/980.pdf (Accessed 22 January 2014). EFSA 2010. Scientific Opinion on Lead in Food. EFSA Panel on Contaminants in the Food Chain (CONTAM). EFSA J., 8(4), 1570: 1-151.
• http://www.efsa.europa.eu/en/efsajournal/doc/1570.pdf (Accessed 22 January 2014).
• EFSA 2012. Scientific Opinion on the risk for public health related to the presence of mercury and methylmercury in food. EFSA J., 10(12), 2985: 1-241. http://www.efsa.europa.eu/fr/efsajournal/doc/2985.pdf (Accessed 22 January 2014).
• ICES 2010. Report of the 2010 session of the Joint EIFAC ⁄ ICES Working Group on Eels. 9-14 September 2010, Hamburg, Germany, CM 2010 ⁄ ACOM: 18.
• Farkas A., Salanki J., Varanka I. 2000. Heavy metal concentrations in fish of Lake Balaton. Lakes Reserv. Res. Manage., 5: 271-279.
• Green NW , Knutzen J. 2003. Organohalogenus and metals in marine fish and mussels and some relationships to biological variables at reference localities in Norway. Mar. Pollut. Bull., 46: 362-377.
• Has-Schon E., Bogut I., Strelec I. 2006. Heavy metal profile in five fish species included in human diet, domiciled in the end flow of River Neretva (Croatia). Arch. Environ. Contim. Toxicol., 50: 545-551.
• Jarosz M. 2001. Nutrition standards for the Polish population. National Food and Nutrition Institute in Poland. Accessed 02 January 2014. (in Polish) http://mail.izz.waw.pl/~it/NORMY/NormyZywieniaNowelizacjaIZZ2012.pdf
• Kwaśniak J., Falkowska L., Kwaśniak M. 2012. The assessment of organic mercury in Baltic fish by use of an in vitro digestion model. Food Chem., 132: 752-758.
• Linde A.R., Sanchez-Galan S., Garcia-Vazquez E. 2004. Heavy metal contamination of European eel (Anguilla anguilla) and brown trout (Salmo trutta) caught in wild ecosystems in Spain. J. Food Protect., 67: 2332-2336.
• Pinho A.P., Guimaraes JR.D., Marins A.S., Costa P.A.S., Olavo G., Vale ntin J. 2002. Total mercury in muscle tissue of five shark species from Brazilian offshore waters: effects of feeding habit, sex, and length. Environ. Res., 89(3): 250-258.
• Polak-Juszczak L. 2007. Chemical characteristics of fishes new to the Polish market. Acta Sci. Pol. Piscaria, 6(2): 27-32.
• Polak-Juszczak L. 2012. Bioaccumulation of mercury in the trophic chain of flatfish from the Baltic Sea. Chemosphere, 89: 585-591.
• Rajkowska M., Protasowicki M. 2013. Distribution of metals (Fe, Mn, Zn, Cu) in fish tissues in two lakes of different trophy in Northwestern Poland. Environ. Monit. Assess., 185: 3493-3502.
• Rodriguez I.B., Raber G., Goessler W. 2009. Arsenic speciation in fish sauce samples determined by HPLC coupled to inductively coupled plasma mass spectrometry. Food Chem., 112: 1084-1087.
• Storell i M. M., Barone G., Piscitell i G., Marcotrigiano G. 2007. Mercury in fish: concentration vs. fish sizes and estimates of mercury intake. Food Addit. Contam., 24: 1353-1357.
• Szlinde r-Richert J., Usydus Z., Male sa-Ciećwierz M., Polak-Juszczak L., Ruczyńska W. 2011. Marine and farmed fish on the Polish market: Comparison of the nutritive value and human exposure to PCDD/Fs and other contaminants. Chemosphere, 85: 1725-1733.
• Usero J., Izquierdo C., Morill o J., Gracia I. 2003. Heavy metals in fish (Solea vulgaris, Anguilla anguilla and Liza aurata) from salt marshes on the Southern Atlantic coast of Spain. Environ. Int., 29: 949-956.

Identyfikatory

DOI

10.5601/jelem.2014.19.2.652