A comparative assessment of heavy metal accumulation in soft parts and byssus of mussels from subarctic, temperate, subtropical and tropical marine environments (original) (raw)
Related papers
2021
Highlight Heavy metals (Cu, Zn, Pb, and Cd) in the seawater, sediment, and soft part of marine mussels were analyzed Bioaccumulation Factor (BAF), Estimated Daily Intake and Target Hazard Quotient (THQ) were calculated Heavy metals in the seawater, sediment and marine mussels were found in varying concentrations Health risk assessment indexes showed low values which means insignificant health hazard Abstract Marine mussels are known as one of the biological indicators of heavy metals pollution in the aquatic environment and the sources of protein for human consumption. This study aimed to investigate the concentration of heavy metals (Cu, Zn, Pb, and Cd) in the seawater, sediment, and soft parts of the marine mussels ( Perna viridis, Meretrix sp ., and Anadara granosa ), as well as to evaluate its health risk of consumption from Madura Strait, Indonesia. The seawater, sediment, and marine mussels were obtained from four sites and heavy metal concentrations were analyzed using Atomic...
Continental Shelf Research, 2011
Concentrations of five heavy metals (Hg, Cd, Pb, Cu and Zn) were determined in tissues of wild mussels (Mytilus galloprovincialis) collected at 41 stations located on the Spanish Atlantic and Northern coasts to assess the levels and spatial distribution of metals in the environment. This study, performed in 2005, constituted a contribution to the last international OSPAR pollution monitoring survey. A pool of mussel soft tissue was prepared using 50 or more individuals, representing the size range present at the sampling points. Quantification was carried out after a nitric acid digestion by atomic absorption spectrometry, AAS (Cd and Pb by electrothermal AAS; Cu and Zn by flame AAS; and total mercury by the cold vapour technique). The quality of the chemical analyses was assessed by interlaboratory exercises carried out on a regular basis. In general, the levels of the metals were higher for the Northern region than for the Atlantic one (except for a sampling site close to Vigo, one of the main Galician industrial areas). Some Galician sampling points (Atlantic coast, NW of Spain) located far from human inputs showed high Cd concentrations, which were attributed to the annual upwelling processes in this region. The levels of Cu increased from Northwest to East, whereas Zn concentrations were very homogeneous throughout the two studied geographical regions. These results were confirmed using multivariate studies (PCA and cluster analysis), as well as international 'background assessment concentrations' criteria.
Marine Ecology-progress Series, 1995
Seasonal variations in metal concentrations in soft tissues of marine mussels can be due, to a great extent, to seasonal changes in flesh weight. Consequently, this event results in an unpredictable overestimation of metal bioavailability when the metal concentration in soft tissues is considered as an index of such metal bioavallability. The Abra estuary (Bizkaia, Bay of Biscay, Spain) was used as a natural experimental basin with well-known differences in the levels of metallic pollutants. The level of metal bioavailability was determined at various sites at different times of the year. For this purpose the conventional approach of recording metal concentrations in soft tissues and the approach based on the calculation of metal/shell-weight indices, first proposed by Fischer (1983), were applied. We concluded that seasonal changes in organism condition (Flesh Condition Index) cause unpredictable oscillations in the metal concentration in soft tissues. For this reason the direct use of metal concentration values is not recommended to assess metal bioavailability. The metal/shell-weight indices, however, were not affected by seasonal changes in the flesh weight of sentinel mussels and thus may provide a more realistic indication of metal bioavailability. In the present study, different metal bioavailabilities, assessed by metal/shell-weight indices, were found at different sampling sites, according to the influence of industrial activities. Seasonal trends in metal/shell-weight indices (attributed to different metal inputs at different tlmes) were also recorded. In conclusion, metal/shell-weight indices, characterized by a high sensitivity and a low noise-to-signal ratio, are a simple and rehable tool for assessing metal bioavailability in 'Mussel Watch' monitonng programmes.
MOJ biology and medicine, 2023
The concentrations of Cu, Cd, Zn, Pb, Ni and Fe in the different soft tissues of Perna viridis from the west and east coast of The Straits of Johore (SOJ) were determined. Crystalline style (CS) recorded higher accumulation of Cu (west: 58.2 mg/kg dry weight; east: 56.0 mg/ kg dry weight), Cd (west: 9.45 mg/kg dry weight; east: 3.93 mg/kg dry weight), Pb (west: 49.5 mg/kg dry weight; east: 7.07 mg/kg dry weight) and Ni (west: 40.0 mg/kg dry weight; east: 20.2 mg/kg dry weight) than those other soft tissues. Byssus meanwhile recorded high levels of Zn (west: 173 mg/kg dry weight; east: 193 mg/kg dry weight) and Fe (west: 3213 mg/kg dry weight; east: 1221 mg/kg dry weight). By comparing the accumulation of heavy metal concentrations in all the eight tissues, CS and byssus recorded the highest accumulation of heavy metals among all tissues, followed by other tissues namely foot, gill, gonad, mantel, muscle and remainder, which recorded relatively low level on heavy metal concentrations. Generally, the soft tissues recorded higher heavy metal concentrations on the east coast than on the west coast of the SOJ. This indicated a high bioavailability and contamination of the potentially toxic heavy metals on the east coast which was due to various human activities.
Environmental Science and Pollution Research, 2010
Purpose The aim of this study was to compare the level of metal contamination in two bays in the middle part of the Eastern Adriatic coastal zone in Croatia using the gills of mussels Mytilus galloprovincialis as indicator tissue. Despite the existing sources of contamination, previous studies with caged mussels only indicated moderate metal contamination of the Kaštela Bay, contrary to the Trogir Bay in which marina and shipyard present a probable source of Cu- and Zn-contamination. Methods The measurements of metallothioneins (MTs) and metals that induce MT synthesis (Cu, Zn, and Cd) were performed in the heat-treated gill cytosol and total proteins (TPs) in the untreated gill cytosol. MTs were determined by differential pulse voltammetry, Cu and Zn by flame atomic absorption spectrometry (AAS), Cd by graphite furnace AAS, and TPs by Bradford spectrophotometric procedure. Results The results collected in four sampling campaigns (autumn periods from 2001 to 2004) indicated that MT levels in mussel gills (expressed on dry mass basis 2.3 ± 0.3 mg g−1) were comparable with basal levels reported in the literature (2.5 ± 0.8 mg g−1). Observed interindividual, temporal, and spatial MT variability could be associated with different confounding factors, such as the time of sampling, total protein concentration, and mussel size rather than cytosolic levels of Cu and Zn. Metal levels, expressed on wet mass basis, in the heat-treated gill cytosol ranged from 1.33 to 11.31 μg g−1 for Zn, from 0.72 to 2.96 μg g−1 for Cu, and from 0.036 to 0.100 μg g−1 for Cd. The highest Zn level was measured at Vranjic (Kaštela Bay)—the site influenced by untreated domestic wastewater, while somewhat increased Zn and the highest Cu levels were found at marina and shipyard locations (Trogir Bay). The highest Cd level was measured at Inavinil (Kaštela Bay). Conclusions The observed association of gill MT levels with several biotic and abiotic factors limits its use as the biomarker of low-level metal exposure. Therefore, the use of the metal concentrations in the heat-treated gill cytosol of Mediterranean mussels should be considered for the assessment of the low-level metal contamination of coastal marine areas.
Journal of Applied Sciences Research
The essential (Cu and Zn) and the non-essential (Pb and Ni) trace metal concentrations were studied in the mussel Donax trunculus from sites exposed to different urban and industrial pollution. Results have indicated that the unpolluted location has recorded the lowest metal levels. However, the concentrations of Pb, Ni, and Zn were significantly higher in site exposed to industrial pollution compared to the other sites. Males have accumulated more nickel than females, from the industrial polluted site, whereas females have higher Cu and Zn compared to males, from the relatively clean site. This study suggests that D. trunculus might be used for trace metal monitoring in Annaba estuaries, and it is not recommended for human consumption in the sites close to Annaba city. Trace metals accumulation pattern in Donax is not only under metal enrichment effect, but it also affected by sex differences.
Trace Metal Residues in Marine Mussels: A Global Survey
Environmental Toxicology and Chemistry, 2021
Pressures from anthropogenic activities are causing degradation of estuarine and coastal ecosystems around the world. Trace metals are key pollutants that are released and can accumulate in a range of environmental compartments and are ultimately accumulated in exposed biota. The level of pressure varies with locations and the range and intensity of anthropogenic activities. This study measured residues of trace metals in Mytilus mussel species collected from a range of locations around the world in areas experiencing a gradient of anthropogenic pressures, that we classified as low, moderate or high impact. The data showed no grouping per impact level when sampling sites in all countries were incorporated in the analysis, but there was significant clustering per impact level for most countries. Overall, high impact areas were characterized by elevated concentrations of zinc, lead, nickel and arsenic, while copper and silver were detected in higher concentrations in medium impact areas. Finally, while most metals were in lower concentrations in areas classified as low impact, cadmium was typically elevated in these areas. This study provides a unique snapshot of worldwide levels of coastal metal contamination through the use of Mytilus species, a well-established marine biomonitoring tool.
Ecotoxicology and Environmental Safety, 2010
Mussels coming from a mussel farm at Brown Bay (Beagle Channel) were transplanted to four sites inside Ushuaia Bay for 2 and 4 weeks. The objective of this study was to assess the quality of coastal waters of Ushuaia Bay by measuring catalase activity, lipid peroxidation, total lipid content, bioaccumulation of heavy metals and condition index in transplanted mussel Mytilus edulis chilensis. Biomarkers except condition index showed significant differences among exposure times as well as among tissues. Digestive gland presented the highest catalase activity, malondialdehyde level and total lipid content. Digestive gland also was the main target tissue of accumulation of iron and copper, while gill accumulated the highest levels of zinc. A principal component analyzes with the whole set of data allowed to separate stations based on physicochemical conditions and biochemical responses of each studied area.
Science of The Total Environment, 2000
The occurrence of changes in flesh and shell weights and in other biometric parameters of mussels, Mytilus gallopro¨incialis, has been related to different metal levels found in their soft tissues. The effects of clean and Zn-polluted environments and laboratory experiments where Zn-polluted mussels were exposed to sublethal concentrations of Zn, Cu and Cd were investigated. Zinc-polluted mussel shell weights increased significantly after a 51-day depuration period. Exposure of Zn-polluted mussels to Zn or Cd, however, caused a slightly reduced shell growth in comparison with depurating mussel Cu-exposures not causing any reduction in growth. Apart from metal concentrations, metalrshell weight indices have been used to assess metal bioavailability. Metal concentrations recorded in the soft tissues of depurating mussels increased without a source of 'extra' metals, while the Znrshell-weight index was reduced, as expected from a depuration process, Cu and Cdrshell-weight indices remaining constant. Experimental exposure to Zn, Cu and Cd caused augmented values of Zn, Cu and Cdrshell-Ž weight indices, respectively. These different findings were attributed to changes in flesh weight related with gamete . spawning that would produce inconsistent estimates of whole metal concentration in soft tissues. Since changes in the tissue composition and in growth rates do not affect ZnrCu ratios and metalrshell-weight indices, these parameters are proposed as reliable indices of metal bioavailability for 'Mussel-Watch' monitoring programmes. The most sensitive parameter is the metalrshell-weight index, which is, therefore, highly recommended to be used in 'Mussel-Watch' monitoring programmes in order to determine metal bioavailability in seawaters. ᮊ M. Soto 0048-9697r00r$ -see front matter ᮊ 2000 Elsevier Science B.V. All rights reserved. Ž . PII: S 0 0 4 8 -9 6 9 7 9 9 0 0 4 8 9 -1 ( ) M. Soto et al. r The Science of the Total En¨ironment 247 2000 175᎐187 176