Concentrations of 17 elements in muscle, gills, liver and gonads of five economically important fish species from the Danube River

Abstract

Key-words:heavy metal, carp, catfish, Danube, pollutionThe Danube River in the vicinity of the city of Belgrade receives large amounts of untreated or poorly treated communal and industrial waste waters. The aim of this study was to assess elemental accumulation patterns in a number of economically important fish species in this area that belong to different trophic levels. Concentrations of 17 elements (Al, As, B, Ba, Cd, Co, Cr, Cu, Fe, Li, Mn, Mo, Ni, Pb, Se, Sr and Zn) were assessed in liver, muscle, gills and gonads of silver carp (Hypophthalmichthys molitrix), freshwater bream (Abramis brama), white bream (Blicca bjoerkna), common carp (Cyprinus carpio) and wels catfish (Silurus glanis) from the Danube River in Serbia by the use of ICP-OES. Silver carp specimens were differentiated from the other four species by high concentrations of Al and Fe in the liver. Common carp specimens were differentiated by high concentrations of Zn in gills, muscle and liver. Distribution of elements among different tissues had a consistent pattern among the species. Concentrations of Pb, Cd, As, Zn, Cu and Fe in muscle were at acceptable levels for human consumption, while concentrations of Fe and Zn were above maximum acceptable concentrations in liver and gonads. RÉSUMÉ Les concentrations de 17 éléments dans le muscle, le foie, les branchies et les gonades de cinq espèces de poissons économiquement importants du Danube Mots-clés : métaux lourds, carpes, silure, Danube, pollutionLe Danube à proximité de la ville de Belgrade reçoit de grandes quantités d'eaux usées communales et industrielles non traitées ou mal traitées. Le but de cette étude était d'évaluer les schémas d'accumulation des éléments dans un certain nombre d'espèces de poissons économiquement importants dans cette région, qui appartiennent à différents niveaux trophiques. Les concentrations de 17 élé-ments (Al, As, B, Ba, Cd, Co, Cr, Cu, Fe, Li, Mn, Mo, Ni, Pb, Se, Sr et Zn) ont été évaluées dans le foie, le muscle, les branchies et les gonades de la carpe argentée (Hypophthalmichthys molitrix), la brème commune (Abramis brama), la brème bordelière (Blicca björkna), la carpe commune (Cyprinus carpio) et silure glane (Silurus glanis) du Danube en Serbie par l'utilisation de l'ICP-OES. Les spécimens de carpes argentées se différencient des quatre autres espèces par des concentrations élevées d'aluminium et de fer dans le foie. Les spécimens de carpes communes sont caractérisés par de fortes concentrations de Zn dans les branchies, les muscles et le foie. La répartition des éléments entre différents tissus a un schéma

Arsenic and Other Trace Elements in Five Edible Fish Species in Relation to Fish Size and Weight and Potential Health Risks for Human Consumption

“…In our study the highest concentration of As was determined in liver (only in pikeperch samples) which is in accordance with results of Lenhardt et al [25] and Al Sayegh Petkovšek et al [41], who found the highest concentrations of As in liver and gills. For other examined species As is uniformly distributed among tissues, as seen in study of Has-Shön et al [42].…”

“…The highest Al concentrations were found in gills, which are in line with previous studies of Višnjić-Jeftić et al [6], Jarić et al [7], Lenhardt et al [25], and Sunjog et al [47], but not in line with Saygi et al [48], who found the highest concentrations of Al in liver. Muscle samples from catfish (1.93 mg·kg -1 ww) had higher concentrations of Al than Danube samples (ND -not detected) [25], but lower than other samples from the Danube (7.50 μg·g -1 dw) [27].…”

“…The highest element concentrations are accumulated in metabolically active tissues such as liver and gills, while muscles commonly have lower element concentrations. Such a pattern has been observed in a number of other studies covering a wide spectrum of fish species [3,7,25,[32][33][34][35][36][37][38][39][40].…”

“…Muscle samples from catfish (1.93 mg·kg -1 ww) had higher concentrations of Al than Danube samples (ND -not detected) [25], but lower than other samples from the Danube (7.50 μg·g -1 dw) [27]. Al concentrations in freshwater bream (7.37 mg·kg -1 ww) were higher than in from Danube samples (ND -not detected) [25], while concentrations of Al in pikeperch muscle samples (2.49 mg·kg -1 ww) were lower than in Danube samples (7.50 μg·g -1 dw) [27]. An essential trace element, selenium, is important for mammals, birds, and fish.…”

“…Only a few studies on element content in organisms living in waters of Serbia have been carried out [6,7,[24][25][26][27].…”