Journal of Aquaculture Research & Development

Rasha K Abd El-Wahed

Publications

• Research Article
  The Acute Toxicity of Copper to Nile Tilapia (Oreochromis niloticus) Fingerlings and its Effects on Gill and Liver Histology
  Author(s): Akram I Alkobaby and Rasha K Abd El-Wahed Akram I Alkobaby and Rasha K Abd El-Wahed
  
  This study was carried out to evaluate the response of Nile tilapia, Oreochromis niloticus to acute copper toxicity. Nile tilapia fingerlings (2.97 g/f ± 0.37) were acclimated and randomly distributed at a rate of 10 fish per 60-L aquarium. In a series of static renewal-toxicity tests, fish were exposed to concentrations of 0, 5, 10, 15, 20, 25, 30, 35 and 40 mg L-1 copper sulfate (CuSO4·5H2O). Fish not exposed to any chemical served as negative controls. Histological sections were done in fish gills and liver in all treatments. Estimates of mean 96-h LC50 values (median lethal concentration) value of copper sulfate was 31.2 mg L-1 (7.94 mg copper L-1). In all exposure groups, some of the typical gill lesions are presented. The main alternations observed after the exposure to the cupper were epithelial hyperplasia, lifting of the lamellar epithelium, edema in the filamen.. View More»
  DOI: 10.4172/2155-9546.1000465

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