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Abstract

Concentrations of eleven trace elements (Zn, M n, Cu, Fe, Cr, Ni, Co, Hg, Pb, Cd and As) as well as the principal components of fish flesh (water%, dry matter%, fat%, protein%, ash% and Ca and M g concentration) were determined in muscles of six fish species (Scardinus knezevici, Alburnus scoranza, Cyprinus carpio, Rutilus prespensis, Anguilla anguilla and Perca fluviatilis) collected from Skadar Lake in 2016. This study, being the first of its kind in fish from M ontenegrin lakes, gave the following overall ranking of the investigated elements in fish muscle: Zn > Fe > M n > Cu > Hg > Cr > As > Ni > Pb > Cd. Several significant inter-metal correlations were observed, while significant relationships between metal concentrations and fish age and size were established predominantly for essential elements. Significant inter-species differences in accumulation of analyzed trace elements were confirmed for Zn, M n, Fe and As. The total metal accumulation was the highest in roach and the lowest in perch, while European eel was found to accumulate more arsenic than other fish species. The consumption of fish from Skadar Lake doesn't pose a risk to human health.

Metal accumulation in relation to size and body condition in an all-alien species community

“…In line with other studies (Jovičić et al 2015;Léopold et al 2015;Jia et al 2017), we found only a few significant relationships between metal concentrations and total length (a proxy for age). In line with previous literature (Rakocevic et al 2018), significant relationships were mainly found for essential elements, while no clear or not-significant relationships were found for the non-essentials. The absence of clear patterns is likely due to fish belonging to the same age class (adults) except for I. punctatus, for which comparable concentrations in both young and old animals were found.…”

“…The only exceptions were Mg and Co in S. glanis, which showed negative relationships, suggesting that life-history changes may play a considerable role. Previous literature showed, however, that this relationship can be highly variable (Alhashemi et al 2012;Luczynska et al 2016;Dragun et al 2016;Rakocevic et al 2018). One possible explanation is that fish could have physiological mechanisms that reduce the impact of metals on body condition (Tenji et al 2020).…”

Trace Elements and Fatty Acid Profile of Argyrosomus regius (Asso, 1801) from Mediterranean Aquaculture

“…The concentration levels of essential TEs (Zn > Fe > Cu > Mn) in meager muscle found in this study are similar to those described in the literature [41]. Mean Zn concentration (4.5 ± 0.7 mg kg −1 ww) is also consistent with data measured in fish from conventional aquaculture (5.3 ± 0.4 mg kg −1 ww) [17].…”

Method Validation and Determination of Several Elements in Farmed Fish by Inductively Coupled Plasma Mass Spectrometry (Icp-Ms)

“…Besides, the concentration of Ni in the tissues was low, which could support the information that the highest amount of Ni was detected in the gill instead of the tissue due to the result of metallothioneins that trapped heavy metals (Saleh & Marie, 2015). Moreover, Co was not detected in any of the fish muscles, which was in agreement with the study of (Rakocevic, Sukovic, & Maric, 2018).…”