Behavior of mercury in biosystems I. Uptake and concentration in food-chain

Prabhu, N.; Hamdy, M. K.

doi:10.1007/bf01683709

Cited by 15 publications

(2 citation statements)

References 24 publications

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“…No correlation was found between uptake rate and either size or sex of fish. Although the same species sorbed significant amounts oP03Hg( + 2) directly from the water of aquaria (Prabhu and Hamdy, 1977), other work has indicated that sediment and algae are the main source of mercury to herbivorous invertebrates and fish. Hakanson (1980) investigated the interactions of pH, trophic level, and mercury contamination of sediments on methylmercury residues in pike from a series of Scandinavian lakes.…”

Section: Fishmentioning

confidence: 94%

Heavy Metals in Natural Waters

Moore

Ramamoorthy

1984

Springer Series on Environmental Management

522

183

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Section: Fishmentioning

confidence: 94%

Heavy Metals in Natural Waters

Moore

Ramamoorthy

1984

Springer Series on Environmental Management

522

183

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“…Heavy metals in the environment have been known to have deleterious effects on plants and animals including humans. The presence of metals in river and stream water leads to accumulation of these metals in fish and other aquatic organisms (Prabu and Handy, 1977) and is subsequently passed to the consumer with adverse consequences on health (Fosset, 1980;Waldron, 1980). The objective of this study therefore was to evaluate the effects of the chemistry laboratory effluent on the lethal limits and oxygen consumption of Tilapia zillii, Sarotherodon galilaeus, S. melanotheron and Oreochromis niloticus which are cultured in large populations in Awba Lake which serves the University of Ibadan and Eleyele reservoir and the South-east of Ibadan.…”

mentioning

confidence: 99%

Lethal Limits and Respiration in the Cichlid Fishes, Tilapia zillii, Sarotherodon galilaeus, S. melanotheron and Oreochromis niloticus Exposed to Effluent from Chemistry Department Laboratories.

Fafioye¹,

Adeogun²,

Omoniyi³

2010

Journal of Applied Sciences and Environmental Management

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ABSTRACT:In this study, the lower and upper lethal limits, LC 50 and respiration of the freshwater cichlid fishes, Tilapia zillii, Sarotherodon galilaeus, S. melanotheron and Oreochromis niloticus exposed to effluents from Chemistry Department Laboratories were investigated. The mixing of the effluents produced a reduction in pH and dissolved oxygen and a fairly constant temperature and salinity of the media, while the toxicity of the effluents increased. The LC 50 values after 24 and 48-h exposure in the effluent media were 0.24% and 0.21% for T. zillii; 0.26% and 0.24% for O. niloticus; 0.25% and 0.23% for S. galilaeus; 0.27% and 0.26% for S. melanotheron, respectively. The effect of chemical effluent on the rate of respiration of the treated cichlids produced lower rates of oxygen consumption in the order of S. galilaeus>O. niloticus>S. melanotheron>T. zilili in the highest concentration of the effluent. The results obtained from this study have shown that the effluents from Chemistry Department Laboratories are not treated as they produced respiratory impairment and physiological dysfunction in the exposed fish. It is suggested that proper treatment of these effluents be carried out before being discharged into the surrounding stream. @ JASEM Investigations were made on the impact of chemical effluent from laboratories of the Chemistry Department, University of Ibadan, Nigeria on the lethal limits and respiration of the freshwater cichlids, Tilapia zillii, Sarotherodon galilaeus, S. melanotheron and Oreochromis niloticus. These species are delicacies in Nigeria and are cultured in large numbers in Awba Lake located near to the effluent discharge site of the Department of Chemistry laboratories, University of Ibadan and Eleyele reservoir, Ibadan. It had been observed that chemical effluents such as mercury, sulphuric acid ) ,

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Mercury

Moore

Ramamoorthy

1984

Heavy Metals in Natural Waters

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Behavior of mercury in biosystems I. Uptake and concentration in food-chain

Cited by 15 publications

References 24 publications

Heavy Metals in Natural Waters

Heavy Metals in Natural Waters

Lethal Limits and Respiration in the Cichlid Fishes, <i>Tilapia zillii</i>, <i>Sarotherodon galilaeus</i>,<i> S. melanotheron</i> and <i>Oreochromis niloticus</i> Exposed to Effluent from Chemistry Department Laboratories.

Mercury

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