Total mercury concentrations in sand flathead, Platycephalus bassensis Cuvier & Valenciennes, from Port Phillip Bay, Victoria

1992 ◽  
Vol 43 (6) ◽  
pp. 1393 ◽  
Author(s):  
GJ Fabris ◽  
C Monahan ◽  
G Nicholson ◽  
TI Walker
Keyword(s):  
Water Depth ◽  
Mercury Concentration ◽  
Total Mercury ◽  
Fish Products ◽  
Axial Muscle ◽  
Muscle Tissues ◽  
Wet Weight ◽  
The Mean ◽  
Mean Concentration

Total mercury concentrations were measured in the axial muscle tissues of 562 sand flathead (Platycephalus bassensis) from a total of 37 sites within Port Phillip Bay, Victoria. Mean concentrations of mercury (0.23 �0.18�g g-1 wet weight) were less than half (P<0.05) of those recorded for this species during 1975-78 and below the Victorian health standard for fish and fish products (i.e. less than a mean concentration of 0.5 �g g-1 wet weight) at all 37 sites. During the 1975-78 period, mercury concentrations in sand flathead from the bay were reported to decrease from north to south and from east to west. During 1990, however, mercury concentrations were found to be related to the water depth at which the fish were sampled. Sand flathead from the deeper (22 m) waters of the bay had significantly (P<0.05) higher mean mercury concentrations than did those collected from shallower (7 m) waters. The overall mean mercury concentration in sand flathead from the bay during 1990 approached the mean concentration in sand flathead collected from six sites in Bass Strait (0.22 �g g-1) during 1975-78, although the range of concentrations for the Port Phillip Bay samples (0.01- 0.89 �g g-1) was wider than that for the Bass Strait samples (0.1-0.33 �g g-1).

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.

Effects of length and locality on the mercury content of blacklip abalone, Notohaliotis ruber (Leach), blue mussel, Mytilus edulis planulatus (Lamarck), sand flathead, Platycephalus bassensis Cuvier & Valenciennes, and long-nosed flathead, Platycephalus caeruleopunctatus (McCulloch), from Port Phillip Bay, Victoria

1982 ◽  
Vol 33 (3) ◽  
pp. 553 ◽  
Author(s):  
TI Walker
Keyword(s):  
Mercury Concentration ◽  
Soft Tissues ◽  
Blue Mussel ◽  
Mercury Content ◽  
Weight Range ◽  
Blue Mussels ◽  
Muscle Tissues ◽  
Wet Weight ◽  
The Mean ◽  
Intermediate Value

Mean concentrations of mercury in the foot tissue and inedible viscera of N. ruber were 0.02 �g g-1 wet weight (range 0.01-0.03 �g g-1) and 0.04 �g g-1 wet weight (range 0.01-0.12 �g g-1), respectively. The mean mercury concentration in the soft tissues of M. e. planulatus was 0.02 �g g-1 (range 0.01-0.07 �g g-1), that in axial muscle tissues of P. bassensis was 0.50 �g g-1 (range 0.06-1.1 �g g-1), and that in P. caeruleopunctatus was 0.56 �g g-1 (range 0.10-2.8 �g g-1). Concentrations of mercury were affected by the lengths of sand and long-nosed flathead but not by the lengths of blacklip abalone or blue mussels. For sand and long-nosed flathead, the effect of locality on concentration was highly significant and indicated a trend for the mercury concentrations of samples to increase from north to south in the region of Port Phillip Bay north of latitude 37�57's. and a reversal of this trend for the region south of this latitude; in the westernmost region of the bay mercury concentrations were of intermediate value. Although not statistically significant, the results for locality of the blacklip abalone and blue mussels were consistent with these trends.

scholarly journals Mercury concentration in the freshwater bonefish Cyphocharax gilbert (Curimatidae) and its parasite the crustacean Riggia paranensis (Cymothoidae)

2008 ◽  
Vol 6 (2) ◽  
pp. 283-288 ◽  
Author(s):  
Débora C. Lins ◽  
Maria E. Meirelles ◽  
Olaf Malm ◽  
Neuza R. W. Lima
Keyword(s):  
Heavy Metals ◽  
Mercury Concentration ◽  
Total Mercury ◽  
Early Embryo ◽  
Fish Parasites ◽  
Fish Liver ◽  
The Mean ◽  
Post Spawning ◽  
Edible Parts ◽  
Mean Concentration

Fish parasites can accumulate heavy metals reaching higher concentrations than the host and may affect the host's bioaccumulation. The present study compared total mercury concentration in the liver and muscle of Cyphocharax gilbert and in the parasite Riggia paranensis sampled in the middle Itabapoana River, Brazil, also considering the reproductive stages of both fish and parasite. Mean concentrations of mercury in muscle of fish varied from 20.8 ng.g-1 in mature females to 38.1 ng.g-1 in post-spawning females. The mean concentrations in fish liver varied from 60.9 ng/g in post-spawning females to 110.4 ng.g-1 in infested males. The mean concentration of mercury in parasites varied from 26.2 ng.g-1 in specimens carrying early embryo to 39.5 ng.g-1 in specimens with eggs. Positive and significant associations (P<0.05) were found between the total mercury concentrations in parasites and muscle of host (both females and males), and between concentrations in parasites and in the liver of male hosts. These results suggest that R. paranensis can be used to indicate mercury levels in edible parts of C. gilbert.

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.

Mercury content of edible flesh from snapper, Chrysophrys auratus (Bloch & Schneider), in the Victorian commercial catch

1981 ◽  
Vol 32 (1) ◽  
pp. 75 ◽  
Author(s):  
TI Walker
Keyword(s):  
Mercury Concentration ◽  
Fork Length ◽  
Mercury Content ◽  
Total Weight ◽  
Commercial Fishing ◽  
Management Options ◽  
Commercial Catch ◽  
Wet Weight ◽  
The Mean ◽  
Statutory Limit

The concentrations of total mercury (range 0.1-1.5 �g /g) in 40 individual snapper, C. auratus, caught in two commercial fishing areas in Victorian waters were adequately correlated with fork length by a power-law relationship. From further relationships established between length and total weight, and between filleted weight and total weight, the mean mercury concentration in the edible flesh of this species was estimated for each of the six years (1973-78) for which information on the length-frequency distribution was available for the Victorian commercial catch. The annual estimates ranged from 0.47 to 0.52 �g/g wet weight, and 45-52% of the edible flesh had values exceeding the Victorian statutory limit of 0.5 �g/g. Various management options available to health and fisheries agencies are discussed, and the methods of calculating the important parameters corresponding to these options are described. For example, graphs are presented from which can be read a legal maximum length of landed snapper, designed to reduce the mean mercury concentration of the catch to below a nominated level.

Mercury fractionation in sediments of the Lower Vistula River (Poland)

2007 ◽  
Vol 36 (3) ◽  
Author(s):  
Leonard Boszke ◽  
Artur Kowalski
Keyword(s):  
Baltic Sea ◽  
Catchment Area ◽  
Total Mercury ◽  
The Baltic Sea ◽  
Vistula River ◽  
Mercury Fractionation ◽  
Flow Through ◽  
The Mean ◽  
The Baltic ◽  
Mean Concentration

Mercury fractionation in sediments of the Lower Vistula River (Poland)The Vistula is the second largest river in the Baltic Sea catchment area and provides one of the main inputs to the Baltic. The river and its tributaries flow through some of the major industrialized and urbanised regions of Poland, making it one of the most highly human-impacted rivers in Europe. Although the river status is monitored routinely, little is known about mercury forms in the sediments. This study examines mercury fractionation in the sediments of the lower part of the Vistula River. The results show that the cities along this stretch of river have a relatively low impact on both the mercury forms found in the sediment and its bioavailability in the floodplain soils. The mean concentration of total mercury in the sediments was 65 ± 14 ng g

scholarly journals Heavy Metals in Muscle Tissue of Pterois volitans from the Veracruz Reef System National Park, Mexico

2019 ◽  
Vol 16 (23) ◽  
pp. 4611 ◽  
Author(s):  
Montoya-Mendoza ◽  
Alarcón-Reyes ◽  
Castañeda-Chávez ◽  
Lango-Reynoso ◽  
Zamudio-Alemán
Keyword(s):  
National Park ◽  
Microwave Digestion ◽  
Dry Weight ◽  
Atomic Absorption Spectrophotometry ◽  
National Standard ◽  
Pterois Volitans ◽  
Reef System ◽  
Wet Weight ◽  
The Mean ◽  
Mean Concentration

Concentrations of cadmium (Cd), lead (Pb), vanadium (V), and zinc (Zn) were measured in the muscle of 30 specimens of Pterois volitans, captured on April 2018, in the Veracruz Reef System National Park (VRSNP), Veracruz, Mexico. Concentrations, in the samples, were quantified with atomic absorption spectrophotometry (AAS), after microwave digestion. Results of the mean concentration, in descending order were V = 7.3 ± 0.7; Pb = 0.66 ± 0.07; Zn = 0.43 ± 0.14; and Cd = 0.03 ± 0.01 mg kg−¹ dry weight. These values did not exceeded limits established in the Mexican National Standard (NOM-242-SSA1-2009), of Cd and Pb (0.5 mg kg–¹) wet weight. This means that consumption of lionfish from this site does not pose a potential risk for human health.

The Pollution of Minamata Bay by Mercury

1992 ◽  
Vol 25 (11) ◽  
pp. 133-140 ◽  
Author(s):  
M. Fujiki ◽  
S. Tajima
Keyword(s):  
Waste Water ◽  
Mercury Concentration ◽  
Total Mercury ◽  
Inorganic Mercury ◽  
Dry Weight ◽  
Mercury Content ◽  
Mercury Oxide ◽  
Wet Weight ◽  
Minamata Bay ◽  
Very High

Minamata Disease, methylmercury poisoning, was recognized late in 1953 among the inhabitants living around Minamata Bay. In a chemical factory situated near Minamata Bay, acetaldehyde had been synthesized by the hydration of acetylene till 1968; in the reaction mercury oxide dissolved in sulfuric acid had been used as a catalyst. Inorganic mercury in waste water from the acetaldehyde plant had been discharged into the bay and it had accumulated into bottom sediment. It was proved that a part of inorganic mercury used as the catalyst had changed into methylmercury by a sidereaction in the plant and waste water containing methylmercury from the plant had discharged into the bay and methylmercury had accumulated into the fishes. The mercury concentrations in the muds were very high: in 1963, 29~713 ppm (dry weight); in 1969, 19~908 ppm (dry weight); in 1970, 8~253 ppm (dry weight) and in 1971, 14~586 ppm (dry weight). Since 1977, dredging work had been carried out to remove mercury-contaminated mud and all of the work had finished at March 1990. The concentration of mercury in fishes from the bay was very high in 1959: shellfishes 108~178 ppm (dry weight) and fish 15 ppm (wet weight). Mercury concentration in fishes has decreased markedly since 1966. Total mercury concentration in fishes (87 species) were 0.01~1.74 ppm (wet weight) and fishes containing over 0.4 ppm of total mercury were 16 species in 1989. The hair of patients contained a high concentration of mercury, the highest being 705 ppm. In 1968, the average mercury concentration in patients was 10.6 ppm, for fishermen, the average was 9.2 ppm, and for general inhabitants, the average was 8.1 ppm. In 1982, the average methylmercury concentration in fishermen was 6.15 ppm and for general inhabitants, the averge was 3.78 ppm. Thus, the mercury content in hair decreased gradually with time. After treatment of mercury in waste water was initiated, the mercury content in fishes from Minamta Bay was gradually reduced. It is necessary to supervise strictly to avoid mercury pollution of the environment.

scholarly journals Use of Mercury in Dental Silver Amalgam: An Occupational and Environmental Assessment

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Nadia Jamil ◽  
Mujtaba Baqar ◽  
Samar Ilyas ◽  
Abdul Qadir ◽  
Muhammad Arslan ◽  
...  
Keyword(s):  
Mercury Concentration ◽  
Preventive Measures ◽  
Potential Health ◽  
Blood Samples ◽  
Dental Clinics ◽  
The Mean ◽  
Wastewater Samples ◽  
Dental Assistants ◽  
Mean Concentration ◽  
Occupational Exposure To Mercury

The objective of this study was to assess the occupational exposure to mercury in dentistry and associated environmental emission in wastewater of Lahore, Pakistan. A total of ninety-eight blood samples were collected comprising 37 dentists, 31 dental assistants, and 30 controls. Results demonstrate that the dentistry personnel contained significantly higher mean concentration of mercury in their blood samples (dentists: 29.835 µg/L and dental assistants: 22.798 µg/L) compared to that of the controls (3.2769 µg/L). The mean concentration of mercury was found maximum in the blood samples of older age group (62.8 µg/L) in dentists and (44.3 µg/L) in dental assistants. The comparison of mercury concentration among dentists, dental assistants, and controls (pairing based on their ages) revealed that the concentration increased with the age and experience among the dentists and dental assistants. Moreover, the mercury concentration in all the studied dental wastewater samples, collected from twenty-two dental clinics, was found to be exceeding the recommended discharge limit of 0.01 mg/L. Therefore, we recommend that immediate steps must be taken to ensure appropriate preventive measures to avoid mercury vapors in order to prevent potential health hazards to dentistry personnel. Strong regulatory and administrative measures are needed to deal with mercury pollution on emergency basis.

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