Trace Metals (Cu, Cd, Pb, Zn, and Ni,) Concentrations in the Sea Cucumber Holothuria tubulosa (Gmelin, 1791) of the Algerian West Coast (original) (raw)
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Egyptian Journal of Aquatic Biology & Fisheries; Vol. 25(3): 619 – 633 (2021), 2021
The present work was organized to evaluate the trace metal contaminations of Cu, Cd, Pb, Zn, and Ni in the organs of Holothuria tubulosa (Gmelin, 1791), at two sites on the Algerian west coast; Ain Franine (AF) and Sidi Lakhdar (SL). The obtained concentrations revealed the presence of heterogeneous metal contents and showed that the most important concentrations were relatively detected in zinc, with values of the male gonads at the level of AF (16.39 ± 2.38 mg / kg PF) for winter and SL (4.65 ± 0.59mg / kg PF) for summer. The lowest zinc values were recorded on the integument for the two sites. The highest Cu values were recorded in spring on the integument of two groups of Holothuria tubulosa. Nickel concentrations showed a high value in the integuments in males (1.08 ±0.03mg / kgP.F) at AF during summer and at SL in spring (0.93 ± 0.02mg / kg PF). While they recorded the lowest values in winter for sea cucumbers of FA and in spring for those of SL for the same organ. The lead concentrations revealed high values on the integument with (1.77 ± 0.56 mg / kg PF) in winter for SL sea cucumbers and (1.36 ± 0.04 mg / kg PF) in summer for those from AF. Moreover, cadmium targeted the same organ as lead where high values were noticed on the integuments during fall for the two communities of sea cucumbers of the order of (0.51 ± 0.03 mg / kg PF) to AF and from (0.43 ± 0.01mg / kg PF) to SL. The analysis of the metal concentrations obtained revealed that, despite the difference in biotope, the two communities of Holothuria tubulosa did not present a significant difference (P> 0.005) for all the metals considered.
This study was performed to determine the concentrations of some trace metals (Cd, Cu, Pb, Ni, Zn, and Fe) in Holothuria tubuosa (Gmelin, 1788) belonging to Echinoderm species and in sediments that they live at three different stations (Gelibolu, Umur Bey/Lapseki, and Dardanos) on Dardanelles Strait between April 2013 and March 2014. The mean trace metal concentrations determined in H. tubulosa and sediment were as follows: Cd 0.18 mg/kg, Cu 2.43 mg/ kg, Pb 2.09 mg/kg, Ni 14.58 mg/kg, Zn 16.86 mg/kg, and Fe 73.46 mg/kg and Cd 0.70 mg/kg, Cu 5.03 mg/kg, Pb 14.57 mg/kg, Ni 27.15 mg/kg, Zn 54.52 mg/kg, and Fe 3779.9 mg/kg, respectively. It was detected that the statistical difference between trace metals determined seasonally in muscle tissue of H. tubulosa was significant (p > 0.05). As a result of the study, it was detected that H. tubulosa is a bioindicator species in determining Ni trace metal in sediment. The results were compared to the limit values of National and International Food Safety, and it was detected that Cd and Ni concentrations measured in sediment were above LEL of Ni and Cd concentrations according to Sediment Quality Guidelines.
Moroccan Journal of Chemistry, 2019
A total of six trace metal elements (Cd, Cr, Cu, Pb, Zn and Ni) were analyzed in the green algae Ulva lactuca (Linnaeus, 1753) and in the tissues of three gastropods: Stramonita hemastomas (Linnaeus, 1766), Phorcus turbinatus (Born 1778) and the limpet Patella caerulea (Linnaeus, 1758)sampled from four stations located along the coastal areas of eastern Algeria (North-Eastern Mediterranean Sea). Data were processed through multivariate approaches such as Principal Component Analysis (PCA) and Linear Discriminant Analysis (LDA) on PCA factors. The results obtained showed a very heterogeneous distribution of pollutants. Highly significant correlations were determined for the different species studied, depending on heavy metals, stations and seasons. In green algae, U. lactuca has been associated with higher levels of Ni, Cr and Zn in the sampling station 'St.T', while an accumulation of Pb and Cu was detected in St.2. Cr was significantly higher in St.3. In winter and spring, mol-lusks had the highest contamination levels. Monodonta and Patella in the stations St.1, St.2 and St.3 showed higher contents in Ni, Zn and Cu, respectively. In addition, Thais and Patella in stations St.T and St.3had a higher contamination with Pb, Crand Cd, respectively. Statistical comparison was performed using the non-parametric Kruskall Wallis and Mann-Whitney tests. This work confirms that U. lactuca, S. haemastoma, P. turbinatus and P. caerulea are good biomonitoring tools of trace metal contamination in Mediterranean marine areas
Bulletin of …, 2008
Concentrations of seven metals (Cd, Cu, Cr, Pb, Ni, Zn, Hg) were monitored monthly during 2 years in two bivalves, Cerastoderma edule and Scrobicularia plana collected from the Souss estuary (South Morocco) before and after the commissioning of a sewage treatment plant in November 2002. According to trace metals, changes in concentrations were observed mainly in S. plana, characterised by a decrease of Cu, Hg and Pb when Cd was clearly increasing. Conversely, no clear changes were observed in C. edule during the same periods. This study suggests the use of S. plana in the monitoring of trace metal contamination of such coastal marine environments.
Fresenius Environmental Bulletin
This paper presents results of trace metal monitoring in the coastal waters of the eastern Adriatic (Croatian coast), during the 2001-2005 period, using the Mediterranean blue mussel (Mytilus galloprovincialis) as indicator species. Levels of essential (Cu, Zn) and non-essential (Cd, Cr, THg, Pb) metals were determined in a whole soft tissue of mussels collected from 20 locations along the eastern Adriatic coast. Examination of the spatial pattern of contaminants revealed two types of metal distribution. Lead, chromium, copper, zinc and total mercury were significantly elevated in the urban and industrial areas. Concentrations of Cr and Cd were more uniformly distributed across all sites. Elevated concentrations of Cd were also found in mussels from rural areas located far away from known anthropogenic sources of contamination. Although elevated concentrations of all trace metals were recorded in the areas with high input of industrial, harbor and urban wastes, the obtained data pro...
BMC Ecology, 2006
Background: Within semi-closed areas like the Mediterranean Sea, anthropic wastes tend to concentrate in the environment. Metals, in particular, are known to persist in the environment and can affect human health due to accumulation in the food chain. The seagrass Posidonia oceanica, widely found in Mediterranean coastal waters, has been chosen as a "sentinel" to quantify the distribution of such pollutants within the marine environment. Using a technique similar to dendrochronology in trees, it can act as an indicator of pollutant levels over a timeframe of several months to years. In the present study, we measured and compared the levels of eight trace metals (Cr, Ni, Cu, Zn, As, Se, Cd, and Pb) in sheaths dated by lepidochronology and in leaves of shoots sampled from P. oceanica meadows collected from six offshore sites in northern Corsica between 1988 and 2004; in the aim to determine 1) the spatial and 2) temporal variations of these metals in these areas and 3) to compared these two types of tissues. Results: We found low trace metal concentrations with no increase over the last decade, confirming the potential use of Corsican seagrass beds as reference sites for the Mediterranean Sea. Temporal trends of trace metal concentrations in sheaths were not significant for Cr, Ni, Cu, As or Se, but Zn, Cd, and Pb levels decreased, probably due to the reduced anthropic use of these metals. Similar temporal trends between Cu levels in leaves (living tissue) and in sheaths (dead tissue) demonstrated that lepidochronology linked with Cu monitoring is effective for surveying the temporal variability of this metal. Conclusion: Leaves of P. oceanica can give an indication of the metal concentration in the environment over a short time period (months) with good accuracy. On the contrary, sheaths, which gave an indication of changes over long time periods (decades), seem to be less sensitive to variations in the metal concentration in the environment. Changes in human consumption of metals (e.g., the reduction of Pb in fuel) are clearly reflected in both organs. These results confirm that P. oceanica is a good bioindicator of metals and a good biomonitor species for assessing Cu in the environment.
Journal of Coastal Life Medicine, 2017
To determine heavy metal concentrations in holothurians (Holothuria arenicola, Holothuria pardalis, Holothuria verrucosa, Holothuria atra, Ohshimella ehrenbergii, Holothuria cinerascens, Stolus buccalis and Holothuria leucospilota), sediments and sea water samples from both Buleji and Sunehri coasts bordering Northern Arabian Sea during January to December 2014 and to assess the level of bioaccumulation using bioaccumulation factors. Methods: Fe, Mn, Zn, Cu, Cd and Pb levels were determined by Perkin Elmer AAnalyst 700 Atomic Absorption Spectrophotometer. Biota concentration factor (BCF) and biota sediment accumulation factor (BSAF) were also calculated. Results: The mean concentrations of heavy metals in body wall of sea cucumber ranged from 0.11 to 2.67, 0.43 to 8.93, 14 to 73, 0.76 to 7.12, 0.52 to 3.02 and 11 to 46 µg/g dry wright for Cd, Cu, Fe, Mn, Pb and Zn, respectively. The greatest biota-sediment bioaccumulation factor (BSAF) value for Zn (3.29) was observed in H. leucospilota at Buleji during pre-monsoon, indicating the species as microconcentrator. The BSAF values for Cd in sea cucumber ranged from 0.042 to 1.492. Conclusions: The results suggested that the studied sea cucumber species ranged from being microconcentrators to deconcentrators. The BSAF values of Cu, Fe, Mn and Pb were low, indicating the species as deconcentrators. Zn in all species from Sunehri coast is "very bioaccumulative" (BCF > 5 000) during all sampling periods. Cu, Fe, Mn and Pb can be considered "bioaccumulative" (BCF < 5 000).
2012
A study was conducted to determine the contamination of Mediterranean mussels (Mytilus galloprovincialis) by some essential and non-essential heavy metals collected from the large Oran Harbour (Oran Bay, Algerian west coast) in November (fall) 2009 and 2010. A total of fifty individuals of mussels, Mytillus galloprovincialis were sampled and metals such as Zinc (Zn), Copper (Cu), Lead (Pb) and Cadmium (Cd) concentration were determined using a flame atomic absorption spectrophotometer equipped with a graphite furnace. The observed mean concentration of Zn, Cu, Pb and Cd in the soft tissues of mussels was respectively, 95.24±1.85, 5.27±0.18, 16.74±1.74 and 0.66±0.04 μg/g dry weight in samples of 2009 and 83.35±2.19, 1.15±0.12, 11.65±0.55 and 0.68±0.04 μg/g dry weight in those of 2010. These concentrations were relatively low compared to those found in mussels of other parts of the world and below certified safety guidelines except the Pb concentrations which exceeded the permissible ...
E3S Web of Conferences
Concentration of Copper, Lithium and Manganese were determined in the whole soft tissues of Mytilus galloprovincialis, collected from the two sites (Bni Ansar and Kariat Arekmane) of the Marchica lagoon of Morocco. The mussels were sampled on December and July of 2019. The ability of mussels to accumulate metals was arranged in the following order: Li < Cu < Mn. The levels of heavy metals in M. galloprovincialis were higher (P<0.05) in December (7.38, 2.63 and 11.10 mg/kg d.w., for Cu, Li and Mn, respectively) than July (5.56, 1.85 and 7.24 mg/kg d.w., for Cu, Li and Mn, respectively) because of the environmental parameters of the seawater and the physiological status of the animal. The trends of accumulations of investigated metals in mussel were higher (P < 0.05) in samples from Bni Ansar than from Kariat Arekmane sites, because of the urban and industrial discharge that submitted the zone of lagoon near to the Bni Ansar city. The Mn concentration in the mussel exceede...