Mercury levels in freshwater fish of the state of South Carolina

Koli, Andrew K.; Williams, W. R.; McClary, Edward; Wright, E. L.; Burrell, T. M.

doi:10.1007/bf01685266

Cited by 21 publications

(5 citation statements)

References 6 publications

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“…Investigation shows that methyl mercury poison has been identified in individuals that depend on fish for their protein requirement (Jemelov and Ramel, 1994). Other workers have identified mercury in fresh fish samples from Georgia and State of South Carolina in the United State of America (Cubie, 1977;Koli et al, 1977).…”

Section: Discussionmentioning

confidence: 98%

Assessment of elemental contaminants in water and fish samples from Aba river

Alinnor

2005

Environ Monit Assess

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The elemental contaminants in water and fish samples from Aba river were studied. The elements studied were Zn, Ni, As, Hg, Co and Mn. Three water samples and three samples of different fish species were collected from different locations in the river. The water and fish samples were analysed for elemental contaminants using Atomic Absorption Spectrophotometer (AAS). The elemental toxicants Zn and Mn were identified in appreciable amounts in fresh fish species namely, Lates niloticus and Oriochronis niloticus, of mean values 8.012 ppm and 0.861 ppm, respectively. The analysis also shows arsenic concentration of mean value 0.01 ppm in Lates niloticus. The analysis of frozen fish samples purchased from the Waterside market located near the river shows Ni and Hg levels of mean values 0.83 ppm and 0.02 ppm, respectively. The levels of elemental contaminants As, Zn, Hg and Mn from the water samples have mean values 0.082 ppm, 11.284 ppm, 0.201 ppm and 1.024 ppm, respectively. There are five industries that discharge waste products into Aba river. In view of this, there is a need to determine the level of pollution of the river, since the inhabitants depend on the river for their drinking water, fishing and other domestic uses. This study is aimed at determining the level of heavy metal toxicants in fish and water samples from the river. The effect of these elemental contaminants and the associated health hazards were examined.

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Section: Discussionmentioning

confidence: 98%

Assessment of elemental contaminants in water and fish samples from Aba river

Alinnor

2005

Environ Monit Assess

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“…The detection of higher concentrations of heavy metals in fish samples in freshwater ecosystem has been reported by many authors [7]. Furthermore, the comparisons of heavy metal concentrations detected in the water, fish and sediment of the Anambra River during the sampling regimens to that of other water bodies in some other locations around the world revealed it to be higher than levels detected in River of South Carolina [10], however, lower than the levels reported by Ekeanyanwu et al [6] but the water column comparable to the value concentrations of Warri River, Delta State of Nigeria [20].…”

Section: Discussionmentioning

confidence: 63%

Ecological Assessment for Trace Metal Pollution in a Freshwater Ecosystem

Damian¹,

Obinwanne²,

Obinna³

2019

IJEE

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Heavy metals in the aquatic environment is of great ecological importance; hence, the study was carried out to evaluate the presence and effects of heavy metals on the water column, fish and sediment composition of Anambra River in July, 2011 and February, 2012 which covered both wet and dry season. The results of the physico-chemical properties showed significant variations (P<0.05) which occurred in DO and conductivity over the sampling seasons on different locations. pH, temperature and salinity showed seasonal difference at P<0.05 in different locations studied. There was no seasonal difference at P>0.05 among the heavy metal concentrations detected in sediment. Post Hoc test also showed no statistical variation (P>0.05) over the five locations: namely Enugu Otu, Ezi -Agulu Otu, Otuocha, Otu Nsugbe and Ukwuibili. There was stable relative non-statistical variations among the heavy metal concentration in the water column but numerical differences demonstrated variability (Otu-Nsugbe > Ezi Agulu Otu > Ukwuibili > Enugu Otu > Otuocha. For the fish species caught both in the rainy and dry season, Clarias gariepinus and Mugil cephalus showed higher (P <0.05) concentrations of Zn in dry than rainy season, while Heterotis niloticus showed higher (P<0.05) concentrations of Zn in rainy than dry season. The highest concentrations of heavy metals were detected in the sediment followed by the fish and finally the water column in a decreasing order of concentrations.

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“…Parasites were freeze-dried to determine dry weight, which was 4.4% of the cyst dry weight. We corrected for the dilution effect of the outer capsule for high infection perch by taking into account capsule weight and assuming MeHg levels typical of bone (6.4· less than muscle, Koli et al 1977), because the chemical composition of the outer capsule surrounding A. brevis is the same as bone (Sinclair 1972). The cysts with capsules removed were divided into three composite samples (*30 parasites each) and analyzed for MeHg using CVAFS.…”

Section: Fish Sampling and Mercury Analysesmentioning

confidence: 99%

Methylmercury levels in a parasite (Apophallus brevis metacercariae) and its host, yellow perch (Perca flavescens)

2007

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The biomagnification of methylmercury (MeHg) amongst trophic levels results in high levels of this compound in many freshwater fish species. The role of parasites in MeHg cycling and trophic transfer in freshwater systems is largely unknown. This study examined the potential for metacercariae of Apophallus brevis to accumulate and biomagnify MeHg from their second intermediate host, yellow perch, Perca flavescens. Contrary to our prediction that MeHg levels would be higher in parasites than in the host muscle tissue in which they are embedded, we found that concentrations were similar. The lack of increase in MeHg levels from host to parasite may be due to limited assimilation of host muscle tissue or, in part, to low parasite metabolism. Parasite load did not reduce fish growth and subsequently alter MeHg concentrations. This study suggests that relationships between larval parasites and their hosts do not conform to typical patterns of MeHg biomagnification seen in aquatic systems.

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Mercury levels in freshwater fish of the state of South Carolina

Cited by 21 publications

References 6 publications

Assessment of elemental contaminants in water and fish samples from Aba river

Assessment of elemental contaminants in water and fish samples from Aba river

Ecological Assessment for Trace Metal Pollution in a Freshwater Ecosystem

Methylmercury levels in a parasite (Apophallus brevis metacercariae) and its host, yellow perch (Perca flavescens)

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