scholarly journals Effect of Industrial Wastewater on Fish in Karoon River

2015 ◽  
Vol 17 (1) ◽  
pp. 109-120
Author(s):  
Zahra Khoshnood ◽  
Reza Khoshnood
Keyword(s):  
Industrial Wastewater ◽  
Total Mercury ◽  
Anthropogenic Activities ◽  
Industrial Site ◽  
Hypophthalmichthys Molitrix ◽  
Karoon River ◽  
Muscle Tissues ◽  
Barbus Grypus ◽  
Standard Values ◽  
Total Hg

Abstract In 2009, 36 fish were sampled from two stations in the Karoon River near an industrial site. Two species of fish, Barbus grypus and Hypophthalmichthys molitrix were analyzed for total mercury (Hg) concentration in liver and muscle tissues. The average concentrations of total Hg in liver of B. grypus were 18.92 and 10.19 μg.g-1 in stations 1 and 2 respectively. The corresponding values for total Hg in edible muscle of Barbus grypus were 8.47 and 0.08 μg.g-1. The average concentrations of Hg in the liver of H. molitrix were 25.49 and 12.52 μg.g-1 in stations 1 and 2 respectively. The values for H. molitrix were 11.88 and 3.2 μg.g-1 in station 1 and station 2 respectively. The results showed that the bioavailability of Hg has increased considerably after industrialization and that these values were higher than the standard values as a result of anthropogenic activities in the region.

Effects of a decade of selenium emission reductions on mercury accumulation in aquatic biota in the Sudbury region of Ontario

2020 ◽  
Vol 77 (5) ◽  
pp. 848-856
Author(s):  
Mija Aždajić ◽  
Nelson Belzile ◽  
John M. Gunn ◽  
Jules M. Blais ◽  
Alexandre J. Poulain
Keyword(s):  
Total Mercury ◽  
Aquatic Environments ◽  
Emission Reductions ◽  
Remediation Strategies ◽  
Total Hg ◽  
Young Of The Year ◽  
Surrounding Landscape ◽  
Smelter Emissions ◽  
Hg Accumulation

Control of smelting emissions in the Sudbury (Ontario, Canada) area has dramatically decreased the amount of selenium (Se) deposited onto the surrounding landscape. Historically, Se emissions in Sudbury correlated with lower total mercury (Hg) and methylmercury levels (MeHg) in tissues of zooplankton, amphipods (Hyalella azteca), mayflies (Stenonema femoratum), and young-of-the-year perch (Perca flavescens). In 2017, ten years following emission reductions, we evaluated whether changes in Se deposition affected total Hg and MeHg burden in lake biota. We show that total Se concentrations in the water of the majority of lakes have increased despite decreases in Se depositions, most likely due to the long residence time of Se in the watershed and the water column. As a result, Se in water continues to correlate with lower total Hg and MeHg accumulation in tissues of zooplankton, amphipods, mayflies, and perch. These results suggest that Se continues to exhibit a protective effect on Hg accumulation in biota, even years after emissions have greatly decreased. We expect this work to inform efforts aiming at long-term recovery of aquatic environments affected by smelter emissions and aid in designing remediation strategies involving Se additions.

Mercury concentrations in edible tissues of Elasmobranchs, teleosts, crustaceans and molluscs from south-eastern Australian waters

1988 ◽  
Vol 39 (1) ◽  
pp. 39 ◽  
Author(s):  
TI Walker
Keyword(s):  
New Zealand ◽  
Total Mercury ◽  
Soft Tissues ◽  
New South ◽  
New South Wales ◽  
South Eastern ◽  
South Wales ◽  
Muscle Tissues ◽  
Edible Tissues ◽  
The Mean

Mean concentrations of total mercury in the axial muscle tissues from 4 species of elasmobranchs (1.33-3.15 �g g-1) and 14 species of teleosts (0.14-0.73�g g-1) from waters deeper than 75 m were generally higher than the mean concentrations in 23 different species of elasmobranchs (0.13- 1.70 �g g-1) and 30 different species of teleosts (0.01-0.29�g g-1) from shallower waters outside Port Phillip Bay. In 5 of the 11 species of teleosts from Port Phillip Bay, which is shallow, almost landlocked and drains a largely urbanized catchment, mean concentrations were 0.39-0.63�g g-; in the remaining 6 species, they were 0.04-0.27�g g-1. Differences in the diets and the longevity of the species are discussed as possible explanations of the variations in the mercury concentrations. Most of the results were similar to those from other studies undertaken on the same species collected from waters off Tasmania and New South Wales, but tended to be higher than the results for the same species collected from New Zealand waters. Mean concentrations of mercury in various soft tissues from eight species of molluscs were 0.01-0.11�g g-1 and in abdominal and thoracic muscle tissues from three species of crustaceans were 0.03-0.13�g g-1..

Mercury concentrations of the axial muscle tissues of some marine fishes of the continental shelf adjacent to Tasmania

1985 ◽  
Vol 36 (4) ◽  
pp. 509 ◽  
Author(s):  
JD Thomson
Keyword(s):  
Total Mercury ◽  
Marine Fishes ◽  
Management Tool ◽  
Published Data ◽  
Organic Mercury ◽  
Commercial Fish ◽  
Total Length ◽  
Muscle Tissues ◽  
Wet Weight ◽  
Health Regulations

The mercury concentrations of 35 commercial and potentially commercial fish species from Tasmanian waters were determined. Four species had mean total mercury concentrations above 0.5 mg kg-1 wet weight and in all four there were individuals with concentrations above 1.5 mg kg-1 wet weight. Two species of shark, Parascyllium ferrugineum and Cephaloscyllium laticeps (with sample sizes of 4 and 1, respectively), had total mercury concentrations above the limit of a mean of 1.0 mg kg-1 wet weight set by the Tasmanian Public Health regulations. Concentrations in the species were compared with published data. Organic mercury concentrations in different species ranged from 40 to 96% of the total mercury concentrations. In fewer than half the species were total mercury concentration and total length or weight significantly correlated, indicating that neither total length nor weight could be used as a universal management tool to control human mercury intake from fish consumption.

A Case History; Minamata Mercury Pollution in Japan – From Loss of Human Lives to Decontamination

1991 ◽  
Vol 23 (1-3) ◽  
pp. 283-290 ◽  
Author(s):  
Akira Kudo ◽  
Shojiro Miyahara
Keyword(s):  
Mercury Concentration ◽  
Industrial Wastewater ◽  
Total Mercury ◽  
Surface Sediments ◽  
Sea Water ◽  
Human Beings ◽  
Organic Mercury ◽  
Yatsushiro Sea ◽  
History Of ◽  
Minamata Bay

At Minamata Bay in Japan, more than 100 people lost their lives and many thousands more were permanently paralyzed from eating mercury contaminated fish. In the long history of water pollution, this was the first known case where the natural bioaccumulation (in fish) of a toxicant from an industrial wastewater killed a large number of human beings. The mercury, discharged from a factory, was deposited on the bottom of the Bay and has remained there since the 1950's. The fate of the mercury was traced by measuring 268 mercury concentrations in the surface sediments at Yatsushiro Sea (outside of the Bay) during the last 14 years. Twenty-four sampling stations were established to collect samples at the same location every year. Samples were analyzed for total mercury concentrations. The concentrations of mercury in the surface sediments at the Sea were not alarming. Only 33 samples exceeded a mercury concentration of 1 ppm. The dispersion of the mercury from the Bay, however, was clearly documented with the data. On average, 3.7 tons of the mercury was transported outside from the Bay every year. A decontamination project started in 1984 dramatically decreased the flow of mercury from the Bay to the Sea. A historic rainfall in 1982 also ‘purified' the surface sediments. Organic mercury concentration in the sea water was 5.1 ng/l while total mercury was 120 ng/l at the center of the Bay in 1985.

scholarly journals Vulnerability of harbour seals, Phoca vitulina, to transient industrial activities in the Strait of Dover

2005 ◽  
Vol 85 (4) ◽  
pp. 1015-1016 ◽  
Author(s):  
Laurent J.J. Seuront ◽  
Perrine Prinzivalli
Keyword(s):  
Interannual Variability ◽  
Industrial Wastewater ◽  
Anthropogenic Activities ◽  
Phoca Vitulina ◽  
Harbour Seal ◽  
Industrial Activities ◽  
Dramatic Decline ◽  
Harbour Seals ◽  
Seal Population ◽  
Number Of Individuals

The abundance of the harbour seal (Phoca vitulina) was recorded on a tidal bar in the Dover Strait off Calais, over a six-year period between 1999 and 2004. Despite clear seasonal and interannual variability in the number of individuals hauled out on the bar, underwater activities devoted to the installation of industrial wastewater pipes conducted during seven weeks 1 km away from the bar led to a dramatic decline in the number of seals hauling out. A full 19 months after the end of the operations the harbour seal population had not recovered their initial abundance. The results of this study have critical consequences on the conservation of P. vitulina in areas impacted by anthropogenic activities.

scholarly journals Mercury pollution of sediments from the river Tisa (Serbia)

2020 ◽  
pp. 73-87
Author(s):  
Snezana Strbac ◽  
Jordana Ninkov ◽  
Petar Raicevic ◽  
Nebojsa Vasic ◽  
Milica Kasanin-Grubin ◽  
...  
Keyword(s):  
Anthropogenic Activities ◽  
Risk Index ◽  
Principal Component ◽  
Pollution Assessment ◽  
Mean Value ◽  
High Pollution ◽  
Total Hg ◽  
The Republic ◽  
Living Organisms ◽  
Lower Stream

Mercury (Hg) has been listed as a global high priority pollutant by many international organizations due to its mobility and persistence in the environments and high toxicity to organisms. This research was conducted with the aims to determine: (i) total Hg content (THg) and its spatial distribution in sediments of river Tisa along the river course, (ii) possible sources of THg and (iii) degree of THg pollution in sediments from the river Tisa through different criteria. Total Hg in the sediments ranged from 0.07 to 0.49 mg kg-1, with mean ? S.D. value of 0.26 ? 0.10 mg kg-1. The highest mean value of THg (0.30 mg kg-1) was found in the lower stream, while the lowest (0.13 mg kg-1) was found in the tributary. According to Principal Component Analyses (PCA) strong positive loading of metals in all parts of the river Tisa is mainly controlled from the same sources. These sources are related to anthropogenic activities based on calculated Enrichment Factor (EF) values. Total Hg are higher than background value. According to the Republic of Serbia official standard, THg values of river Tisa sediments were within the range of maximum permissible values. Compared with National Oceanic and Atmospheric Administration (NOAA) guideline, 80.49% of sediment samples indicated that THg in the river Tisa sediments represented minimal and possible risk towards the living organisms. Integrating the results of pollution assessment, it could be concluded that THg in river Tisa sediments in Serbia demonstrates considerable contamination according to Geoaccumulation Index (Igeo), and Contaminant Factor (CF), and high pollution risk according to Potential Environmental Risk Index (PERI).

scholarly journals Cooking process evaluation on mercury content in fish

2010 ◽  
Vol 40 (4) ◽  
pp. 741-748 ◽  
Author(s):  
Luciana Aparecida Farias ◽  
Déborah Inês Fávaro ◽  
José Osman Santos ◽  
Marina Beatriz Vasconsellos ◽  
Artemiza Pessôa ◽  
...  
Keyword(s):  
Process Evaluation ◽  
Fish Species ◽  
Total Mercury ◽  
Feeding Habits ◽  
Mercury Content ◽  
Herbivorous Fish ◽  
Nutritional Evaluation ◽  
Cooking Process ◽  
Roasting Process ◽  
Total Hg

This study evaluated different cooking processes (roasted, cooked and fried) on total mercury (Hg) content in fish species most consumed by Manaus residents and surrounding communities, Amazon region. The results obtained for total Hg in natura and after the three types of preparation (roasted, cooked and fried) for 12 fish species showed a significant Hg concentration variation. In the present study the cooked and frying processes resulted in higher Hg losses for Pacu, Pescada, Jaraqui, Curimatã, Surubin and Aruanã fish species, most of them presenting detritivorous and carnivorous feeding habits. The higher Hg losses in the roasting process occurred for Sardinha, Aracu, Tucunaré, Pirapitinga, Branquinha and Tambaqui fish species, most of them being omnivorous and herbivorous fish species. Some micronutrients (Ca, Fe, K, Na, Se and Zn) in fish species in natura were also determined in order to perform a nutritional evaluation regarding these micronutrients.

Effects of species, sex, length and locality on the mercury content of school shark Galeorhinus australis (Macleay) and gummy shark Mustelus antarcticus Guenther from south-eastern Australian waters

1976 ◽  
Vol 27 (4) ◽  
pp. 603 ◽  
Author(s):  
TI Walker
Keyword(s):  
Total Mercury ◽  
Mercury Content ◽  
South Eastern ◽  
Muscle Tissues ◽  
Wet Weight ◽  
The Mean

The mercury levels detected in the muscle tissues of sharks ranged from 0.01 to 2.7 pprn wet weight for school shark Galeorhinus australis (Macleay) and from 0.07 to 3.0 ppm for gummy shark Mustelus antarcticus Guenther. Estimates of the mean mercury levels for the 1971 Victorian landed commercial shark catch were found to be 0.90 ppm for the school shark and 0.37 ppm for the gummy shark. The analyses for total mercury determinations were carried out by five independent laboratories. Preliminary analyses carried out by one indicatcd that most of the mercury in school sharks and about two-thirds of the mercury in gummy sharks was present as methylmercury. The mercury concentrations varied exponentially with shark length. School sharks had statistically significantly higher mercury levels than gummy sharks of the same length and for both the medium- sized and large individuals of each species males had significantly higher levels than females. Levels in male gummy sharks were found to be affected by locality.

Methylmercury in fish from the southern Baltic Sea and coastal lagoons as a function of species, size, and region

2017 ◽  
Vol 33 (6) ◽  
pp. 503-511 ◽  
Author(s):  
Lucyna Polak-Juszczak
Keyword(s):  
Fish Species ◽  
Total Mercury ◽  
Coastal Lagoons ◽  
Length Distribution ◽  
Fish Length ◽  
Consumer Health ◽  
Fish Size ◽  
Toxic Compound ◽  
Muscle Tissues ◽  
The Central Nervous System

Background: Methylmercury (MeHg) is a highly toxic compound that traverses the blood–brain barrier with deleterious effects to the central nervous system. Exposure is generally through the ingestion of contaminated fish. Fish are a main source of MeHg. Goals and methods: The aim of this study was to determine the dependence of MeHg concentrations on fish species and age, the percentage of MeHg in total mercury (THg) and risk assessment depending on the size of fish. Assays of THg and MeHg were performed on the muscle tissues of 18 species of fish. Results: The investigations indicated there were differences in the mercury concentrations depending on fish size. THg and MeHg concentrations in the muscles of fish species that have a wide length distribution were strongly, positively correlated with fish length. However, concentrations of MeHg were strongly, positively correlated with those of THg in all the fish species investigated. Variation in the percentage share of MeHg in THg in the muscles of fish of large sizes was also noted within species, but this correlation was not noted in small-sized fish. The dose of MeHg in small-sized fish species was estimated and the risk posed to consumer health was assessed using mean MeHg concentrations determined for different fish species. Conclusions: For species of fish that occur within a wide length distribution, the dose of MeHg should be assessed separately in different length classes. Fish consumption of small-sized species poses no health risk.

scholarly journals Identification And Study Of Fish Species In Karkheh River (Iran)

2014 ◽  
Vol 16 (2) ◽  
pp. 97-106
Author(s):  
Zahra Khoshnood
Keyword(s):  
Fish Species ◽  
Cyprinus Carpio ◽  
Shannon Index ◽  
Ctenopharyngodon Idella ◽  
Hypophthalmichthys Molitrix ◽  
Fish Biodiversity ◽  
Barbus Grypus ◽  
Barbus Sharpeyi ◽  
Liza Abu

Abstract For the investigation of fish from Karkheh River, sampling was performed in a six month period from August 2014 to January 2015. All sampled fish were measured for biometrical values (length and weight). General results of the sampling and identification of the fish showed the presence of 14 species from four fish families of Cyprinidae, Mugilidae, Siluridae and Macrostomidae, out of which the Cyprinidae family were the most frequent of the sampled fish. The most significant abundance belongs to Cyprinus carpio. The fish sampled in the present study were: Liza abu, Ctenopharyngodon idella, Barbel sp., Cyprinion macrostomum, Barbus sharpeyi, Hypophthalmichthys molitrix, Barbus esocinus, Barbus barbulus, Barbus luteus, Barbus grypus, Cyprinus carpio, Silurus triostegus, Mastacembelus circumcinctus and Capoeta trutta. Shannon Index results showed that the fish biodiversity in the studyed area followed a uniform path and additionally that the considered area at the studied period has good fish biodiversity.

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