scholarly journals Bioaccumulation and health risk assessment of trace elements in Mytilus galloprovincialis as sea food in the Al Hoceima coasts (Morocco)

2021 ◽  
Vol 240 ◽  
pp. 01002
Author(s):  
Ghizlane Azizi ◽  
Mostafa Layachi ◽  
Mustapha Akodad ◽  
Antonio Ignacio Martín-García ◽  
David R. Yáñez-Ruiz ◽  
...  
Keyword(s):  
Trace Elements ◽  
Mytilus Galloprovincialis ◽  
Physiological State ◽  
Environmental Parameters ◽  
Sampling Period ◽  
Human Consumption ◽  
Food And Agriculture ◽  
Sampling Campaign ◽  
Al Hoceima ◽  
Monthly Variations

The monthly variations in metal concentration of Cadmium (Cd), Zinc (Zn) and Chromium (Cr) were determined in tissues of Mytilus galloprovincialis and seawater obtained from the mussel farm installed along the Al Hoceima coasts, during the sampling period of 2018. The heavy metals encountered in the bivalves were higher than those observed in their environment with a decreasing order of Zn > Cr > Cd. The results also showed a decreasing trend for the metals studied during the summer sampling campaign. The maximum values were obtained during the wet periods. The monthly variations in trace metals observed in the mussel tissues were due to environmental parameters and the physiological state of the bivalves. Our results revealed that the average concentrations of pollutants found in M. galloprovincialis were below the limits allowed by the Food and Agriculture Organization of the United Nations (FAO) which are 2.0, 1000 and 1.0 mg/kg, for Cd, Zn and Cr, respectively in molluscan shellfish for human consumption. Therefore, the trace elements present in the tissues of Al Hoceima shore mussels do not represent a risk to human health associated with their consumption, even during the period of their maximum bioaccumulation. Our work highlights the potential use of Mytilus galloprovincialis in the Biomonitoring of metallic pollutants in this region of the northern Moroccan coasts.

scholarly journals Relationships between Environmental Factors and Pathogenic Vibrios in the Northern Gulf of Mexico

2010 ◽  
Vol 76 (21) ◽  
pp. 7076-7084 ◽  
Author(s):  
C. N. Johnson ◽  
A. R. Flowers ◽  
N. F. Noriea ◽  
A. M. Zimmerman ◽  
J. C. Bowers ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Water Column ◽  
Vibrio Vulnificus ◽  
Environmental Parameters ◽  
Sampling Period ◽  
Pathogenicity Factor ◽  
Hemolysin Gene ◽  
Thermostable Direct Hemolysin ◽  
Pathogenic Vibrios ◽  
Abundance And Distribution

ABSTRACT Although autochthonous vibrio densities are known to be influenced by water temperature and salinity, little is understood about other environmental factors associated with their abundance and distribution. Densities of culturable Vibrio vulnificus containing vvh (V. vulnificus hemolysin gene) and V. parahaemolyticus containing tlh (thermolabile hemolysin gene, ubiquitous in V. parahaemolyticus), tdh (thermostable direct hemolysin gene, V. parahaemolyticus pathogenicity factor), and trh (tdh-related hemolysin gene, V. parahaemolyticus pathogenicity factor) were measured in coastal waters of Mississippi and Alabama. Over a 19-month sampling period, vibrio densities in water, oysters, and sediment varied significantly with sea surface temperature (SST). On average, tdh-to-tlh ratios were significantly higher than trh-to-tlh ratios in water and oysters but not in sediment. Although tlh densities were lower than vvh densities in water and in oysters, the opposite was true in sediment. Regression analysis indicated that SST had a significant association with vvh and tlh densities in water and oysters, while salinity was significantly related to vibrio densities in the water column. Chlorophyll a levels in the water were correlated significantly with vvh in sediment and oysters and with pathogenic V. parahaemolyticus (tdh and trh) in the water column. Furthermore, turbidity was a significant predictor of V. parahaemolyticus density in all sample types (water, oyster, and sediment), and its role in predicting the risk of V. parahaemolyticus illness may be more important than previously realized. This study identified (i) culturable vibrios in winter sediment samples, (ii) niche-based differences in the abundance of vibrios, and (iii) predictive signatures resulting from correlations between environmental parameters and vibrio densities.

scholarly journals Life histories and distribution of ostracods with depth in western Lake Geneva (Petit-Lac), Switzerland: a reconnaissance study

Crustaceana ◽  
2014 ◽  
Vol 87 (8-9) ◽  
pp. 1095-1123 ◽  
Author(s):  
Laurent Decrouy ◽  
Torsten W. Vennemann
Keyword(s):  
Life History ◽  
Water Temperature ◽  
Water Depth ◽  
Organic Matter Content ◽  
Environmental Parameters ◽  
Late Winter ◽  
Lake Geneva ◽  
Monthly Basis ◽  
Sampling Campaign ◽  
Western Lake

Because environmental conditions within a given basin are different for each season and at different water depth, knowledge of the life history and depth distribution of target species is important for environmental and palaeoenvironmental interpretations based on ostracod species assemblages and/or the geochemical compositions of their valves. In order to determine the distribution of species with depth as well as the life history of species from Lake Geneva, a one-year sampling campaign of living ostracods was conducted at five sites (2, 5, 13, 33 and 70 m water depth) on a monthly basis in the Petit-Lac (western basin of Lake Geneva, Switzerland). Based on the results, the different species can be classified into three groups. Littoral taxa are found at 2 and 5 m water depth and include, in decreasing numbers of individuals,Cypridopsis vidua(O. F. Müller, 1776),Pseudocandona compressa(Koch, 1838),Limnocythere inopinata(Baird, 1843),Herpetocypris reptans(Baird, 1835),Potamocypris smaragdina(Vávra, 1891),Potamocypris similis(G. W. Müller, 1912),Plesiocypridopsis newtoni(Brady & Robertson, 1870),Prionocypris zenkeri(Chyzer & Toth, 1858) andIlyocyprissp. Brady & Norman, 1889. Sublittoral species are found in a majority at 13 m water depth and to a lesser extend at 33 m water depth and include, in decreasing numbers of individuals,Fabaeformiscandona caudata(Kaufmann, 1900),Limnocytherina sanctipatricii,Candona candida(O. F. Müller, 1776) andIsocypris beauchampi(Paris, 1920). Profundal species are found equally at 13, 33 and 70 m water depth and includes, in decreasing numbers of individuals,Cytherissa lacustris(Sars, 1863),Candona neglectaSars, 1887 andCypria lacustrisLilljeborg, 1890. The occurrence ofLimnocytherina sanctipatricii(Brady & Robertson, 1869) is restricted from late winter to late spring when temperatures are low, whileC. vidua,L. inopinata,P. smaragdina,P. similis,P. newtoniandIlyocyprissp. occur predominantly from spring to early autumn when temperatures are high. Individuals ofC. neglecta,C. candida,F. caudata,P. compressa,C. lacustris,H. reptansandCp. lacustrisoccur throughout the year with juveniles and adults occurring during the same period (C. neglectaat 70 m,C. lacustrisat 13, 33 and 70 m, andH. reptansat 2, 5 and 13 m water depth) or with juveniles occurring during a different period of the year than adults (C. neglectaat 13 and 33 m andC. candida,F. caudataandP. compressaat their respective depth of occurrence). Among the environmental parameters investigated, an estimate of the relationship between ostracod autoecology and environmental parameters suggests that in the Petit-Lac: (i) water temperature and substrate characteristics are important factors controlling the distribution of species with depth, (ii) water temperature is also important for determining the timing of species development and, hence, its specific life history, and (iii) water oxygen and sedimentary organic matter content is less important compared to the other environmental parameter monitored.

scholarly journals First Record Of Meroplius Fukuharai (Iwasa 1984) (Diptera: Sepsidae) On Romanian Territory

2015 ◽  
Vol 57 (2) ◽  
pp. 121-125
Author(s):  
Lavinia Iancu ◽  
Cristina Purcarea
Keyword(s):  
Relative Humidity ◽  
Air Temperature ◽  
Environmental Parameters ◽  
Sampling Period ◽  
First Record ◽  
Research Area ◽  
Insect Species ◽  
First Report ◽  
South Eastern ◽  
Species Dynamics

Abstract The present study represents the first report on the presence of Meroplius fukuharai (Diptera: Sepsidae) in Romania. The research area was located in Bucharest. Meroplius fukuharai was recorded during an experiment for investigating necrophagous insect species dynamics. Adult specimens were sampled during the summer (August 2013) from swine carcasses at the beginning of the advanced decay stage. The species had a sporadic occurrence, only four male specimens being sampled and identified both morphologically and genetically during the four-month survey. The recorded environmental parameters during the sampling period showed an air temperature of 28-33°C and a relative humidity of 53-57%. This report on the presence of M. fukuharai in Romania leads to the expansion of its known distribution range in the South Eastern part of Europe.

scholarly journals Wave Modeling for the Establishment Potential Area of Offshore Aquaculture in Indonesia

Fluids ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 229
Author(s):  
Muhammad Zikra ◽  
Haryo Dwito Armono ◽  
Fahrizal Pratama
Keyword(s):  
Environmental Parameters ◽  
Wave Model ◽  
Human Consumption ◽  
Total Production ◽  
Sustainable Aquaculture ◽  
Wave Modeling ◽  
Establishment Potential ◽  
Offshore Aquaculture ◽  
Potential Area ◽  
Suitable Location

Aquaculture is expected to further improve in the future and can provide 57 percent of fish for human consumption by 2025. In Indonesia, the aquaculture sector produced 5.77% of the world total production in 2014 and increases annually by, on average, 0.62%. Prigi Bay, located in the south of east Java, is one potential area to develop sustainable aquaculture in Indonesia. This study presents numerical wave modeling to investigate the potential area for offshore aquaculture in Prigi Bay. The method used Delft3D Flow and CG WAVE model to simulate wave and current. The superimposed analysis is used to select potential areas between the results of the model and the criteria of environmental parameters. The result shows that the location which meets the aquaculture criteria is located at coordinates 8.311° S–8.322° S and 111.734° E–111.747° E. This site has a depth of around 18–26 m with current velocity between 0.10 and 0.14 m/s and significant a wave height between 0.2–0.4 m. This location is the most suitable location for aquaculture in the Prigi Bay.

Trace Element Concentrations in Mussels (Mytilus galloprovincialis) from the Gulf of Trieste, Slovenia

2019 ◽  
Vol 82 (3) ◽  
pp. 429-434 ◽  
Author(s):  
ZLATKA BAJC ◽  
ANDREJ KIRBIŠ
Keyword(s):  
Inductively Coupled Plasma ◽  
Mytilus Galloprovincialis ◽  
Adriatic Sea ◽  
Sampling Site ◽  
Maximum Level ◽  
Human Consumption ◽  
Northern Adriatic Sea ◽  
Potential Health ◽  
Northern Adriatic ◽  
Inductively Coupled

ABSTRACT The concentrations of the trace elements zinc (Zn), arsenic (As), manganese (Mn), copper (Cu), chromium (Cr), nickel (Ni), cobalt (Co), cadmium (Cd), lead (Pb), mercury (Hg), and iron (Fe) were examined in Mediterranean blue mussels (Mytilus galloprovincialis) from the Northern Adriatic Sea to determine whether there were site differences and seasonal variations in metal concentrations and to evaluate the potential health risks of consumption of these mussels to humans. Mussels were collected between January and October 2015 from three Slovenian shellfish harvesting areas and from a lighthouse near Debeli Rtič. The concentrations of elements were determined using inductively coupled plasma mass spectrometry. The amount of each element decreased in the following order: Fe > Zn > (As, Mn) > (Cu, Cr) > (Ni, Co) > (Cd, Pb) > Hg. Statistical analysis revealed that time, that is, the month of sampling, significantly affected the concentrations of elements in mussels (P < 0.05). The concentrations of Cr, Mn, Fe, Ni, Hg, and Pb were highest between January and March and lowest between May and September. The concentrations of other elements in mussels were not higher or lower for several consecutive months, but occasionally (some months) lower or higher content was detected. The sampling site had a statistically significant effect only on the content of Cd, Pb, and Hg in mussels (P < 0.05). The lowest level of these elements was found in mussels from Seča, and the highest levels of Hg and Pb were found in mussels from Debeli Rtič. Debeli Rtič is, among all sampling points, closest to the outflow of the Soča River that brings heavy metals into the Northern Adriatic Sea from a closed Hg mine. Because the concentrations of Pb, Cd, and Hg in all analyzed samples were below the maximum level permitted by Commission Regulation No 1881/2006, mussels were suitable for human consumption.

scholarly journals Trace Element Characterization in Household Dusts in Industrial Areas Along Highways in Bangladesh and their Health Implications

2019 ◽  
Vol 43 (1) ◽  
pp. 47-58 ◽  
Author(s):  
Md Badiuzzaman Khan ◽  
Md Reazul Islam ◽  
Bilkis Ara Begum ◽  
Md Abdullah Miah
Keyword(s):  
Trace Elements ◽  
Anthropogenic Sources ◽  
Health Impacts ◽  
Vehicular Emission ◽  
Industrial Areas ◽  
X Ray ◽  
Sampling Campaign ◽  
Carcinogenic Effects ◽  
Academy Of Sciences ◽  
Different Sources

A study was carried out in the industrial areas in order to determine the composition of trace elements in dusts deposited at homes, identifying different sources of elements and also for their possible health impacts. A total of 14 deposited dust samples were collected from households near industrial areas of Tangail and Gazipur districts during sampling campaign. Samples were analyzed using X-ray Fluorescence and the highest concentration was observed for Fe whereas the overall rank of the concentrations is Fe>Ca>K>Ti>Zn>Pb>Zr>Sr>Rb>Cu>Y>As>Cr>Ni. The Correlation analysis, enrichment factor and factor analysis indicated that anthropogenic sources especially industrial activity, vehicular emission and household cooking are the main sources of trace elements in the study areas. The non-carcinogenic and carcinogenic health risks indicated that children are more vulnerable for non-carcinogenic effects whereas the values of cancer risk for both the child and adult are below the acceptable limit of European Union. Journal of Bangladesh Academy of Sciences, Vol. 43, No. 1, 47-58, 2019

Total Reflection X-ray Spectrometry (TXRF) for Trace Elements Assessment in Edible Clams

2014 ◽  
Vol 68 (11) ◽  
pp. 1241-1246 ◽  
Author(s):  
Eva Marguí ◽  
Alexandra de Fátima Marques ◽  
Maria de Lurdes Prisal ◽  
Manuela Hidalgo ◽  
Ignasi Queralt ◽  
...  
Keyword(s):  
Trace Elements ◽  
Preliminary Investigation ◽  
Total Reflection ◽  
Mass Spectrometry Analysis ◽  
Human Consumption ◽  
Ultratrace Analysis ◽  
Present Contribution ◽  
Analytical Methodology ◽  
Element Determination ◽  
X Ray

The present contribution presents a preliminary investigation of the chemical composition with respect to major, minor, trace, and ultratrace elements in several clam species that are frequently used for human consumption in Portuguese markets and worldwide. In order to use a simple and rapid analytical methodology for clam analysis, energy dispersive X-ray fluorescence (EDXRF) spectrometry and total reflection X-ray fluorescence (TXRF) spectrometry were selected as analytical techniques. The analytical capabilities of TXRF spectrometry were evaluated for the determination of minor and trace elements in commercial edible clams. We compared the direct analysis of powdered suspensions (using different sample amounts and dispersant agents) with the analysis of the digested samples for trace element determination. Inductively coupled plasma mass spectrometry analysis of clam digests was also performed to evaluate the analytical possibilities of TXRF spectrometry for trace and ultratrace analysis.

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