Heavy metals in fish from the Barents Sea (summer 1994)

150

New information on the concentrations of Cd, Cu, Hg and Zn in the liver, kidney and muscles of eight marine benthic and pelagic sub-Antarctic fish species are presented to determine the importance of these metals in the marine systems of the Kerguelen Islands. Compared to the reported metal concentrations in other Antarctic fish species, the present results are globally within the same range of concentrations, although Cd displayed a very high interspecific variability in liver and kidney. Indeed, the highest Cd concentrations in liver, ranging from 10.0 to 52.1 mg g dry y1 wt. but also the lowest Cd concentrations in muscles (-0.030 mg g dry wt.) have been displayed by the pelagic y1 Myctophidae Gymnoscopelus piabilis. Metal concentrations differences might be related to diet and feeding habits of benthic and pelagic fish species. However, Cd and Hg concentrations in the edible muscle are lower than the French limit values ((0.155 mg Cd g dry wt. and (1.51 mg Hg g dry wt.) for these toxic metals as well as for edible y1 y1and non-commercially interesting fish species. Results for Cd in fish tissues are consistent with the hypothesis of Cdenrichment in the polar food webs typically explained by essential elements depletion. In fact, Zn concentrations in fish from the Kerguelen Islands are comparable to those of other areas but low Cu concentrations in fish livers, ranging from 0.9 to 24.7 mg g dry wt., might indicate low availability of this essential element in these sub- y1Antarctic waters. ᮊ

Section: Interference On the Origin Of The Metalsmentioning

confidence: 52%

Section: Interference On the Origin Of The Metalsmentioning

confidence: 99%

Distribution of trace elements in the tissues of benthic and pelagic fish from the Kerguelen Islands

Bustamante¹,

Bocher²,

Cherel³

et al. 2003

150

“…13, the minimum Hg toxicity threshold in fish muscle of 0.5 μg/g ww, based on the review by Sandheinrich and Wiener (2010), is seldom exceeded in Arctic marine fish species. Similarly, a survey of Hg in the muscle of fish species from the Barents Sea reported that mean Hg concentrations did not exceed 0.25 μg/g ww in any species (Zauke et al, 1999). Arctic freshwater species tended to have higher Hg concentrations than marine species (Fig.…”

Section: Comparison Of Fish Effect Levels With Mercury Concentrationsmentioning

confidence: 81%

What are the toxicological effects of mercury in Arctic biota?

Dietz

Sonne

Basu

et al. 2013

321

202

► Unpublished and published data were compiled for Arctic fish, birds, and mammals. ► These data were compared to available toxicological threshold limits. ► Toothed whales, polar bears, and some bird and fish species exceeded the limits. ► Increasing mercury concentrations are observed for some Arctic species. ► These exceeded thresholds and increasing Hg trends are of concern. a b s t r a c t a r t i c l e i n f o This review critically evaluates the available mercury (Hg) data in Arctic marine biota and the Inuit population against toxicity threshold values. In particular marine top predators exhibit concentrations of mercury in their tissues and organs that are believed to exceed thresholds for biological effects. Species whose concentrations exceed threshold values include the polar bears (Ursus maritimus), beluga whale (Delphinapterus leucas), pilot whale (Globicephala melas), hooded seal (Cystophora cristata), a few seabird species, and landlocked Arctic char (Salvelinus alpinus). Toothed whales appear to be one of the most vulnerable groups, with high concentrations Science of the Total Environment 443 (2013) [775][776][777][778][779][780][781][782][783][784][785][786][787][788][789][790]

“…For other areas such as the Barents Sea recent information on metals in offshore zooplankton and crustaceans is largely lacking, in contrast to other components of the marine food web like inshore benthic invertebrates , fish (Zauke et al, 1999), sea birds and marine mammals (Booth and Zeller, 2005).The Barents Sea is an important area for commercial fisheries; with total annual yields reaching 3-4 million tons, it is comparable to Icelandic waters and the Norwegian Sea (Gjosaeter, 1995;Hansen et al, 1996). Because potential contamination of fish with heavy metals due to the marine food web might be crucial for the future exploitation of this resource, information on this issue is urgently needed.…”

Section: Introductionmentioning

confidence: 99%

Heavy metals in zooplankton and decapod crustaceans from the Barents Sea

Zauke

Schmalenbach

2006

Trace metals (Cd, Cu, Pb and Zn) were analysed in zooplankton samples and decapod crustaceans collected on cruises of "RV Walther Herwig III" to the Barents Sea (Summer 1991(Summer , 1994(Summer and 2000. We found a substantial spatial heterogeneity in the decapod crustacean Pandalus borealis, with increasing Cd concentrations from the south (North Cape Bank; 0.7 mg kg -1 DW) to the north (north of Svalbard; 4.7 mg kg -1 ), supporting the hypothesis that the frequently reported Cd-anomaly in polar crustaceans might be extended to the Barents Sea. Regarding various crustaceans and zooplankton collectives (2000) a distinct interspecific heterogeneity of metals was obvious, with lowest Cd concentrations in euphausiids and chaetognaths and highest ones in decapods and hyperiid amphipods; lowest Cu concentrations in chaetognaths and copepods and highest ones in euphausiids and decapods; and lowest Zn concentrations in euphausiids and decapods and highest ones in some copepods. For Pb many values were below or close to the limit of detection, suggesting that Pb concentrations about 0.4 mg kg -1 might serve as a regional background value. Results for Cd, Cu and Zn in copepods of this study are largely within the reported range, but high Cd concentrations in copepods from summer in contrast to reported lower ones during winter/spring may be related either to changing accumulation strategies of the copepod species involved or to seasonally changing Cd absorption in copepods from food.keywords: biomonitoring; trace metals; zooplankton; Cd-anomaly; spatial, intra-and interspecific heterogeneity