Edris Rahimikia; Sara Vali; Paria Akbary; Abdolreza Jahanbakhshi
Volume 5, Issue 1 , September 2016, , Pages 23-29
Abstract
Heavy metals are the important pollution which there is in the aquatic ecosystems. Today, with advances in technology have increased the pollution therefore it is important to assessment the risks. The aim of this study was acute toxicity effects of mercury chloride, lead chloride and zinc chloride ...
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Heavy metals are the important pollution which there is in the aquatic ecosystems. Today, with advances in technology have increased the pollution therefore it is important to assessment the risks. The aim of this study was acute toxicity effects of mercury chloride, lead chloride and zinc chloride in silver carp fish. In this study there were 5 treatments for lead chloride and mercury chloride and 6 treatments for zinc chloride. The average lethal concentration (LC50) of these insecticides on fish within 96 hours was determined using probit analysis. Toxicity tests at 96 hours, 100% mortality shown at 1 mg per liter concentration for mercuric chloride and 60 mg per liter concentration for lead chloride and zinc chloride. LC50 96h was for mercuric chloride 0.55±0.63, Lead chloride 39.9±0.76 and Zinc chloride on 41.1±0.20. Based on this it was concluded that mercury chloride more toxic to silver carp fish compare to lead and zinc chloride so we should prevent the entrance of such substances, specific mercury, to the aquatic ecosystems.
Aliakbar Hedayati; Abdolreza Jahanbakhshi; Mohammad Moradzadeh
Volume 4, Issue 1 , September 2015, , Pages 27-34
Abstract
Abstract In respect to nano-technological studies and physiological and biochemical lesions of these materials on aquatic animals, in this study we examine the toxicity effects of nano-zinc oxide (ZnO NPs) on hematological indices of common carp (Cyprinus carpio). LC50 of nano zinc oxide was determined ...
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Abstract In respect to nano-technological studies and physiological and biochemical lesions of these materials on aquatic animals, in this study we examine the toxicity effects of nano-zinc oxide (ZnO NPs) on hematological indices of common carp (Cyprinus carpio). LC50 of nano zinc oxide was determined according to the mortality at 24, 48, 72 and 96 hours, respectively. During separate experiment based on the LC50 levels, hematological parameters were studied with induction of the sub-lethal concentrations of nano zinc oxide. In this study, lethal toxicity concentration of nano-ZnO (LC50) for common carp was 3.120 ± 0.23 ppm. when the fish were exposed to sub lethal concentrations (50% of LC50) for 7days, the results showed that the nano-particles causes various changes in the blood parameters of the fish that these changes was affected by the nano-particles in blood indices by reducing the level of red blood cells (RBC), Hemoglobin, Hematocrit and increase in white blood cells (WBC) (P0.05) in the exposed nano-ZnO. The results of this study showed that the sub-lethal toxicity of nano-particles could have a negative impact on hematological indices of Common carp, so we should prevent the entrance of such substances to the aquatic ecosystems.
