2010
DOI: 10.4314/jasem.v12i1.55573
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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.

Abstract: 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 effl… Show more

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“…In this study, the level of Pb in O. niloticus and C. nigrodigitatus was higher in the gills than in the bones and eyes corroborating the studies of Metcalfe et al (1999). The sub-lethal concentrations effects of lead include delayed embryonic development, suppressed reproduction, increased mucous formation, neurological problems and kidney dysfunction (Rompala et al, 2004;Fafioye et al, 2008). Oladimeji and Offem (2009) noticed in O. niloticus and C. nigrodigitatus, that the gills had high cumulative potential of Pb as Lead nitrate.…”
Section: Discussionmentioning
confidence: 99%
“…In this study, the level of Pb in O. niloticus and C. nigrodigitatus was higher in the gills than in the bones and eyes corroborating the studies of Metcalfe et al (1999). The sub-lethal concentrations effects of lead include delayed embryonic development, suppressed reproduction, increased mucous formation, neurological problems and kidney dysfunction (Rompala et al, 2004;Fafioye et al, 2008). Oladimeji and Offem (2009) noticed in O. niloticus and C. nigrodigitatus, that the gills had high cumulative potential of Pb as Lead nitrate.…”
Section: Discussionmentioning
confidence: 99%