scholarly journals The relationship between the mercury concentration in fish muscles and scales/fins and its significance

2011 ◽  
Vol 9 (6) ◽  
pp. 1109-1116 ◽  
Author(s):  
Rostislav Červenka ◽  
Antonín Bednařík ◽  
Josef Komárek ◽  
Markéta Ondračková ◽  
Pavel Jurajda ◽  
...  
Keyword(s):  
Fish Species ◽  
Absorption Spectrometry ◽  
Fish Muscle ◽  
Mercury Content ◽  
Mercury Contamination ◽  
Coefficient Of Determination ◽  
Fish Scales ◽  
Fish Muscles ◽  
Mercury In Fish ◽  
The Relationship

AbstractThe determination of mercury in fish typically involves analysis of muscles. For predicting the concentration of mercury in fish muscle on the basis of the analysis of fish scales or fins, the relationship between total mercury concentrations in fish muscles and in fish scales and fins was studied. Mercury content in fish muscles, scales and fins was determined by atomic absorption spectrometry with thermal decomposition of the sample in a flow of oxygen. A number of scale treatments were applied in order to remove impurities and to enhance the prediction quality. For scale treatment, 40 min of washing with DI water in an ultrasonic bath is recommended. A coefficient of determination r2= 0.93 for the relationship between Hg concentrations in muscles and scales was achieved for 40 fish among the different fish species tested (European bream, perch, roach) from the Hamry Reservoir, Czech Republic. With respect to fin sampling, the coefficient of determination r2 for these fish was 0.86. The analysis of fish scales and caudal fins is a useful screening tool for assessing the relative mercury contamination of monitored fish. The method of sampling scales is not suitable for fish species with small scales such as brown trout.

Method validation for the determination of total mercury in fish muscle by cold vapour atomic absorption spectrometry

2012 ◽  
Vol 29 (4) ◽  
pp. 617-624 ◽  
Author(s):  
A.P. Nascimento Neto ◽  
L.C.S. Magalhães Costa ◽  
A.N.S. Kikuchi ◽  
D.M.S. Furtado ◽  
M.Q. Araujo ◽  
...  
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Method Validation ◽  
Total Mercury ◽  
Absorption Spectrometry ◽  
Fish Muscle ◽  
Mercury In Fish ◽  
Cold Vapour

Caudal Fin Mercury as a Non-Lethal Predictor of Fish-Muscle Mercury

2005 ◽  
Vol 2 (2) ◽  
pp. 96 ◽  
Author(s):  
Paul T. Gremillion ◽  
James V. Cizdziel ◽  
Norman R. Cody
Keyword(s):  
Muscle Tissue ◽  
Body Burden ◽  
Absorption Spectrometry ◽  
Fish Muscle ◽  
The Body ◽  
Fish Length ◽  
Caudal Fin ◽  
Routine Monitoring ◽  
Mercury In Fish ◽  
Efficient Uptake

Environmental Context. Surveys to assess the body burden of mercury in fish to support research or contamination advisory programs typically involve capturing and killing fish and analyzing muscle tissue for mercury. Lethal sampling may not be feasible in protected waters or in studies involving threatened or endangered species. We analyzed tail fin samples of two fish species for total mercury and compared results with muscle-tissue mercury and concluded that fin-Hg can be used as a predictor of muscle-Hg. This approach enables catch and release studies for mercury in fish. Abstract. The caudal (tail) fins from 17 walleye (Sander vitreus) and 12 northern pike (Esox lucius) from three northern Arizona lakes (Long Lake, Soldier Lake, and Upper Lake Mary) were analyzed for total-Hg by combustion–atomic absorption spectrometry. Results indicate that the fin contains measurable Hg that correlates with muscle-Hg concentrations. As the body burden of Hg increased, the concentration in the fin increased relative to the muscle. Mercury concentrations also increased with fish length and weight, although the relationship was lake- and species-dependent. Fish from Soldier Lake had the most efficient uptake of Hg, likely due to the trophic structure of the lake or the condition of the fish, but possibly due to an acute source of Hg. Overall, this study demonstrates that caudal fin clippings can be used as a non-lethal predictor of muscle-Hg concentrations, which can reduce the number of fish killed in routine monitoring programs.

Mercury Content in Commercially Available Finfish in the United States

2014 ◽  
Vol 77 (8) ◽  
pp. 1361-1366 ◽  
Author(s):  
DENNIS P. CLADIS ◽  
ALISON C. KLEINER ◽  
CHARLES R. SANTERRE
Keyword(s):  
United States ◽  
New England ◽  
Channel Catfish ◽  
Total Mercury ◽  
Atlantic Cod ◽  
Fish Muscle ◽  
The United States ◽  
Mercury Content ◽  
Mercury In Fish ◽  
King Mackerel

Seventy-seven finfish species (300 composites of three fish) were obtained from commercial vendors in six regions of the United States: Great Lakes, mid-Atlantic, New England, northwest, southeast, and southwest. Total mercury in fish muscle tissue ranged from 1 ppb (channel catfish) to 1,425 ppb (king mackerel). Of the top 10 most commonly consumed seafoods in the United States, all finfish species, including salmon species (13 to 62 ppb), Alaskan pollock (11 ppb), tilapia (16 ppb), channel catfish (1 ppb), Atlantic cod (82 ppb), and pangasius (swai) (2 ppb), had low total mercury concentrations. However, two large predatory species, king mackerel and swordfish (1,107 ppb), contained mercury concentrations above the current U.S. Food and Drug Administration action level of 1,000 ppb, indicating that consumers may be unaware that species that are high in mercury are being sold in the marketplace.

scholarly journals Assessment of seasonal and spatial variations of heavy metals in the muscles of Oreochromis niloticus and Clarias gariepinus at Sharkia province, Egypt: Biochemistry and Histology Evaluation

2019 ◽  
pp. 14-29
Author(s):  
Farida A Mansour ◽  
Heba N Gad EL-Hak ◽  
Mahi A Ghobashy ◽  
Maha FM Soliman ◽  
Nahla S El-Shenawy
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Water Sample ◽  
Fish Species ◽  
Oreochromis Niloticus ◽  
Physicochemical Parameters ◽  
Clarias Gariepinus ◽  
Fish Muscle ◽  
Manganese Concentration ◽  
Fish Muscles

The most significant pollutants are the heavy metals in the aquatic network due to their toxicity, accumulation, and bio-magnification. In an attempt to characterize the physical-chemical and demonstrate the potential water impact of the heavy metal content of wastes in two lakes in Sharkia province, Egypt, this study was developed to determine their toxicity and the potential waste impacts in biochemistry and histology of fish muscle. Samples of water and fish muscles were collected and analyzed for heavy metals using atomic absorption of two different fish species (Oreochromis niloticus and Clarias gariepinus) along two canals in Sharkia province in Egypt during the four seasons in 2018. The water samples were also analyzed for the physicochemical parameters. The impact of heavy metal on the enzymatic antioxidant (superoxide dismutase and catalase) as well as the reduced glutathione content, besides the oxidative stress marker presented by lipid peroxidation levels in fish muscles, were evaluated. Results showed the largest amount of chloride (Cl-) and iron (Fe) in the Sharkia water sample, while Faquas water sample had the highest level of HCO3 and iron (Fe). The manganese concentration in the fish muscle was the highest in Sharkia water and the highest level of Fe was detected in the fish muscles collected from Faquas area. These high levels of some of the physicochemical parameters and heavy metals in the two lakes with two different wastes as seen in this study may be a source of water pollution. The highest accumulation of metals in the muscle of the two fish species, suggesting risk for human consumption. There were seasonal variations in the level of LPO in muscle tissue of two types of fishes with a reverse relationship with antioxidant parameters. This accumulation varied seasonal and spatial as well as according to the species of fish. Increasing the level of heavy metals effect on the biochemistry and histology of fish. Keywords: Heavy metals; Muscle; Oxidative/Antioxidant, Histology, Clarias gariepinus; Oreochromis niloticus

scholarly journals Do the total mercury concentrations detected in fish from Czech ponds represent a risk for consumers?

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Sehonova Pavla ◽  
Harustiakova Danka ◽  
Mikula Premysl ◽  
Medkova Denisa ◽  
Malacova Kristyna ◽  
...  
Keyword(s):  
Aquatic Ecosystems ◽  
Total Mercury ◽  
Absorption Spectrometry ◽  
Mercury Content ◽  
Predatory Fish ◽  
Average Content ◽  
Fish Tissues ◽  
The Czech Republic ◽  
Mercury In Fish ◽  
Commission Regulation

AbstractMercury is one of the important pollutants of the environment. Therefore, it’s necessary to monitor quantity of mercury especially in aquatic ecosystems. The main goal of the presented study was to compare the content of total mercury in tissues of fish coming from the Czech Republic, an important carp exporter, with focus on comparison of mercury content between 3 different ponds, its comparison between different fish species and between different tissues of the same species, and estimation whether the mercury content in tissues meets the limit given in the Commission Regulation (EC) No. 1881/2006 or not. Total mercury concentration was measured in 90 fish specimen sampled from three ponds (Velky Kocelovicky, Mysliv and Zehunsky) in autumn 2018. The values of total mercury in fish tissues was measured by atomic absorption spectrometry. The content of total mercury in the tissues decreased as follows: muscle > liver > gonads > scales. The highest average content of total mercury in muscle was 0.1517 ± 0.0176 mg/kg coming from pike caught in Velky Kocelovicky pond. In contrast, the lowest average content of total mercury in muscle 0.0036 ± 0.0003 mg/kg was found in carp tissue coming from the locality of Zehunsky pond. We confirmed that the predatory fish are more exposed to mercury than non-predatory fish. None of the monitored localities exceeded the set regulatory limit. Thus, our study shows that fish coming from these ponds are safe in terms of total mercury content.

scholarly journals Mercury content in the parasite-host system of Ligula intestinalis and Abramis brama and the effect of the parasite on fish muscle composition

2014 ◽  
Vol 83 (2) ◽  
pp. 89-93
Author(s):  
Miroslava Palíková ◽  
Stanislav Navrátil ◽  
Andrea Dvořáková ◽  
Iveta Bedáňová ◽  
Jan Mareš ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Mercury Concentration ◽  
Fish Muscle ◽  
Mercury Content ◽  
Infected Fish ◽  
Abramis Brama ◽  
Host System ◽  
Ligula Intestinalis ◽  
Fish Muscles ◽  
The Mean

The bioaccumulation potential of parasites resulting from the competition for chemical elements including heavy metals represents a valuable instrument of evaluating the functions of the parasite-host system. In the present study, the effect of the parasite-host system of Ligula intestinalis and Abramis brama on the mercury concentrations and fish muscle composition of infected and non-infected fish was evaluated. Nine parasitized and seven non-parasitized fish were studied. The total mercury content in the samples was determined by the atomic-absorption spectrophotometry method. Standard indicators of the chemical composition of muscles (dry matter, crude protein, fats, and ash) and a spectrum of fatty acids were evaluated. The mean mercury concentration in the biomass of plerocercoids was 0.045 ± 0.025 mg·kg-1; about × 7 lower compared to fish muscles. The mean mercury concentration in the muscles of infected and non-infected fish was 0.36 ± 0.11 and 0.24 ± 0.1, respectively. There was no difference in the composition of fish muscles and the spectrum of fatty acids. Ligula intestinalis takes nutrients from the fish body but according to the results of our study, the withdrawal of the monitored nutrients was uniform without any selection. Mercury is not efficiently accumulated by plerocercoids of Ligula intestinalis. This study brings novel data for this heavy metal and for this parasite host system.

scholarly journals Relación entre comunidad íctica y cobertura vegetal riparia en períodos hidrológicos (Eje Cafetero, Colombia)

2011 ◽  
Vol 16 (2) ◽  
pp. 119 ◽  
Author(s):  
María Angélica Pérez-Mayorga ◽  
Saúl Prada-Pedreros
Keyword(s):  
Fish Species ◽  
Vegetation Cover ◽  
Riparian Vegetation ◽  
Fish Community ◽  
Multiple Correlation Coefficient ◽  
Coefficient Of Determination ◽  
Sampling Effort ◽  
Fish Community Structure ◽  
Structural Variables ◽  
The Relationship

<p><strong>Objective.</strong> To assess the relationship between structure and diet of the fish community and the riparian vegetation cover (RVC), in two hydrological periods (HYPE) in streams of the La Vieja river basin. <strong>Materials and methods.</strong> Collections were done with electrofishing and <em>rapiché </em>in March and May 2010. Efficiency of sampling effort was assessed with the estimator Chao2. Structure was analyzed using the indices of richness, dominance, diversity and evenness which were compared with an ANOVA. Gastrointestinal contents were analysed with the indices of vacuity coefficient, frequency, volume and food importance. We examined the relationship among diet, HYPE and RVC using the multiple correlation coefficient (r), the coefficient of determination (r<sup>2</sup>) and a Canonical Correspondence Analysis (CCA). <strong>Results.</strong> According to the Chao2 estimator, in most streams the fish species richness values are representative. There were no significant differences (P&gt;0.05) among the structural variables, the HYPE and the RVC. According to r and r<sup>2</sup> the diet of most fish species did not vary as a function of RVC and HYPE; however, according to the CCA diet varies as a function of HYPE but not of RVC. <strong>Conclusions.</strong> The fish community structure did not show changes according to RVC and HYPE. Although most species showed no changes in their diet, the community did show changes in diet according to HYPE, due to a change in composition; however diet changes were not detected by RVC.</p> <p><strong>Key words:</strong> coffee-growing region, diet, fish community, hydrological period, riparian vegetation cover, structure.</p><br />

scholarly journals Assessment of mercury contamination in the Bílina River (Czech Republic) using indicator fish

2012 ◽  
Vol 81 (1) ◽  
pp. 63-68 ◽  
Author(s):  
Kamila Kružíková ◽  
Zdeňka Svobodová
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Absorption Spectrometry ◽  
Rutilus Rutilus ◽  
Mercury Content ◽  
Mercury Contamination ◽  
Upstream Site ◽  
Significant Difference ◽  
The Elbe River ◽  
Bílina River

The aim of the study was to determine mercury content in the muscle of indicator fish and to assess mercury pollution along the Bílina River, which is one of the most important tributaries of the Elbe River. A total of eight sites were chosen on the Bílina River for sampling. Indicator fish chub (Leuciscus cephalus L), roach (Rutilus rutilus L.) and brown trout (Salmo trutta m. fario L.) in the total numbers of 24, 26 and 27, respectively, were sampled at four locations, since at the remaining sites fish were absent. Mercury concentrations in the muscle of sampled indicator fish were measured using cold vapour atomic absorption spectrometry on an AMA 254 analyser. The highest mercury content (0.12 ± 0.027 mg·kg-1) was found in the muscle of roach at the Ústí nad Labem site and the lowest mercury content (0.04 ± 0.008 mg·kg-1) in the muscle of brown trout from the Březenec (the first upstream site) site. A significant difference (P < 0.05) between the analyzed fish species was found only between chub (0.08 mg·kg-1) and brown trout (0.04 mg·kg-1) at the Březenec site. The priority of this study was to assess the mercury contamination of the Bílina River because this river flows through a heavy industrial activity in the region (especially production of petrochemicals, agrochemicals, sorbents, plasticizers and textile auxiliaries). Despite the fact that the Bílina is an extensively polluted river, the obtained mercury results were very low and did not exceed the limit of 0.5 mg·kg-1 set by Commission Regulation No. 1881/2006.

scholarly journals Mercury content in the muscle of fish from the Elbe River and its tributaries

2011 ◽  
Vol 50 (No. 11) ◽  
pp. 528-534 ◽  
Author(s):  
V. Žlábek ◽  
Z. Svobodová ◽  
T. Randák ◽  
O. Valentová
Keyword(s):  
Total Mercury ◽  
Hazard Index ◽  
Perca Fluviatilis ◽  
Mercury Content ◽  
Mercury Contamination ◽  
Elbe River ◽  
Contamination Assessment ◽  
Fresh Fish ◽  
Fish Muscles ◽  
The Elbe River

The main aim of the present study was to assess the mercury contamination of the Elbe River and its tributary the Vltava River. Mercury concentrations in fresh fish muscles were used for the contamination assessment. The samples were collected in 1999, 2002 and 2003 at 7, 2 and 1 collection sites from the Elbe River, Vltava River and Blanice River (tributary of the Vltava River), respectively. Samples of bream (Abramis brama&nbsp;L.), perch (Perca fluviatilis L.) and chub (Leuciscus cephalus L.) muscle were collected at the monitored sites. A single-purpose mercury analyser AMA 254 was used to determine the total mercury content in the muscle tissue of fish. Average concentrations of mercury in the muscle of bream, perch and chub were in the range 0.172&ndash;0.852 mg/kg, 0.077&ndash;1.07 mg/kgand 0.141&ndash;1.631 mg/kg,respectively. The highest values of total mercury content were found in fish from the localities Obř&iacute;stv&iacute; and Lys&aacute; nad Labem (P &lt; 0.05; P &lt; 0.01, respectively) in the river section from 120<sup>th</sup> to 160<sup>th</sup> river kilometre. The highest value of total mercury content (2.56 mg/kg) in the fresh muscle of chub was in the Obř&iacute;stv&iacute; vicinity. It poses a high risk for consumers, considering the average consumption of 10 kg fish per capita/year (hazard index 3.0). On the other hand, total mercury contamination decreased in the localities Děč&iacute;n and Hřensko (15<sup>th</sup>&ndash;5<sup>th</sup> r. km) in the period 1999&ndash;2003. The findings in 2003 indicated that the disastrous floods in 2002 did not significantly influence the mercury contamination of fish. &nbsp;

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