الفهرس 
Aim of WorkOnly 14 pages are availabe for public view
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Abstract
Regarding fast development of the nanotechnology and its diverse applications, the present work aimed to study the effect of the sublethal dose (1/10 LC50) of AgNPs on Oreochromis niloticus at different environmental conditions. So, healthy fish of Nile tilapia Oreochromis niloticus weighing approximately 70 g/fish were collected from fish culture, Fayoum Governorate, Egypt. Fish were transferred to the laboratory and acclimated for 2 weeks in large tanks with well aerated dechlorinated tap water (25 ± 10C). The pH was 7.3 ± 0.2 and oxygen content was 7.2 mg/l that was maintained constant using air pump. All the studied fishes were individually examined and recorded for Freemont from any skin lesions or apparent disease symptoms. Toxicity tests were carried out on the Nile tilapia; Oreochromis niloticus for Ag and showed that the 96 hr LC50 value of the Nile tilapia O. niloticus was 5.25 mg/l.