animal biosystematic
Habibe Zare; Batool Gorgin; Fateme Azizzadeh
Abstract
This study examines the status of toxic metals in the soil and fish of the Persian Gulf coast, focusing on Bushehr region. The main goal of this research is to identify and evaluate the concentration of heavy metals such as lead, cadmium, mercury and arsenic in soil samples and fish caught from this ...
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This study examines the status of toxic metals in the soil and fish of the Persian Gulf coast, focusing on Bushehr region. The main goal of this research is to identify and evaluate the concentration of heavy metals such as lead, cadmium, mercury and arsenic in soil samples and fish caught from this area. Using the standard methods of sampling and chemical analysis, the method recommended by the Environmental Protection Agency (EPA 3050B) was used as a common acid digestion method, and the necessary data were collected and analyzed. According to the values obtained from five stations on the shores of the Persian Gulf, the concentration of heavy metals, manganese, zinc, chromium and nickel is more than other metals. Also, by examining the average rate of heavy metals in the fish of three Persian Gulf stations, the concentrations of aluminum, zinc, lead, nickel, and copper are the highest. The results showed the presence of high concentrations of some toxic metals in soil and fish, which can be caused by industrial activities, agriculture and oil pollution. These findings raise concerns about ecosystem health and food safety in Bushehr region and emphasize the necessity of management and monitoring measures to reduce pollution and protect natural resources. In general, heavy metals are toxic to the body at very low levels. Aluminum, lead, cadmium, and nickel have a higher degree of toxicity, therefore, the increase of these metals in the tissue of fishes is associated with many risks. The main mechanism of heavy metal toxicity includes the production of free radicals to cause oxidative stress, damage to biological molecules such as enzymes, proteins, lipids, nucleic acids and DNA damage.
Morteza Kamali; Saeid Alinejad Moaelem; Nastaran Pour-Ahmadi
Abstract
Abstract Due to its suitable properties and the low cost; Di 2-Ethyl Hexyl phthalate (DEHP) is widely used as a plasticizer in manufacturing of articles made of PVC. This substance is of paramount importance with the estrogen-like properties and its effects on the survival and health of ecosystems and ...
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Abstract Due to its suitable properties and the low cost; Di 2-Ethyl Hexyl phthalate (DEHP) is widely used as a plasticizer in manufacturing of articles made of PVC. This substance is of paramount importance with the estrogen-like properties and its effects on the survival and health of ecosystems and the aquatic and human populations. In present study; effects of toxicity of DEHP on protein band model and amino acid profile of mucus common carp (Cyprinus carpio) was studied. 108 common carp (17.60±2.22gr) is gathered from warm water fish center and they were allocated into 9 tanks (12 Fish per tank). Fish adapted to new condition for a week. During this time; they were feed twice a day with same diets. Fishes were exposed at 3 concentration treatments containing 0; 0.1 and 1 mg/L DEHP under laboratory condition (25±0.5°C; pH: 7.4-8) for a period of 96 hours. We assessed skin mucus protein profiles by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) and we were studied amino acid profile by HPLC. The results of the experiments to compare the protein pattern of carp’s mucus (exposed to DEHP with two different concentrations) with the control sample (without exposure to DEHP) showed that there is a significant difference in the bands density between the two protein patterns. These results indicated that concentrations of DEHP beneficially affects Amino Acid profiles of skin mucus in carp and they were categorized in 4 branches. There were Significant differences between exposed and control groups. Therefore; fish skin mucus can be a biomarker for showing contaminants and toxins. And the high consumption of plastic materials can be a warning to the health of aquatic animals and humans.
H Khandan Barani; M Miri; H. A. Dahmardeh
Volume 4, Issue 3 , January 2016, , Pages 1-11
Abstract
Abstract Pollution is a world problem with serious consequences. Heavy metals are an important group of these contaminants and enter aquatic ecosystems from anthropogenic and natural sources and animal health and systems are affected. In this study, the effect of lead exposure (3 mg/l concentration, ...
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Abstract Pollution is a world problem with serious consequences. Heavy metals are an important group of these contaminants and enter aquatic ecosystems from anthropogenic and natural sources and animal health and systems are affected. In this study, the effect of lead exposure (3 mg/l concentration, 30 days) on activity of tissue enzymes, including acetyl cholinesterase, alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP) and lactate dehydrogenase (LDH) In liver, gills, brain and muscle were studied in Snow trout (Schizothorax zarudnyi). The results showed that lead caused a significant inhibition of acetyl cholinesterase in the gills and brain as compared to control group (p˂0/05). The activity of ALT was increased significantly in the liver and brain homogenates following lead acetate exposure (p˂0/05). A significant increase in AST activity was observed in the liver and brain (p˂0/05). Moreover, LDH and ALP activity were increased significantly following lead acetate exposure only in the liver (p˂0/05). According to this, lead exposure in Snow trout leads to interactions between these metal and biological systems, which could affect metabolic enzyme activities in some tissues.The enzyme activity by lead did not follow the same pattern of increase or decrease and different results were based on enzymes and tissue. Therefore, monitoring of enzymatic profiles in tissues of Snow trout could be useful for identification of overall fish health and organ dysfunction following lead exposure.
H. Ghafari Farsani; S. A. Akbar Hedayati; M. Mansouri Chorehi; N. Rostamian; E. Chaharde Baladehi
Volume 3, Issue 4 , July 2015, , Pages 9-16
Abstract
Abstract The aim of current study was to evaluate the effects of heavy metal cadmium on liver tissue of gold fish during experimental condition. Study was in a week on 5 treatments and 3 replicates, five concentration (2.8, 5.6, 8.4 and 11.2 ppm respectively) of cadmium as 0 (control), 25%, 50%, 75% ...
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Abstract The aim of current study was to evaluate the effects of heavy metal cadmium on liver tissue of gold fish during experimental condition. Study was in a week on 5 treatments and 3 replicates, five concentration (2.8, 5.6, 8.4 and 11.2 ppm respectively) of cadmium as 0 (control), 25%, 50%, 75% and 100% of LC50 were selected and tested. Histopathological changes were done using classic histology method in hematoxylin and eosin staining and using a light microscope and camera images properly installed and connected the camera to the computer system software was developed. The overall result of this study showed that in liver tissue exposed to cadmium over a week with increasing duration of exposure to pesticide exposure, a high level of toxin in the lesion by the most frequent lesions end of a week, was observed including necrosis, atrophy and cloudy swelling of the cell. Result of this study show that liver tissue have many lesions in response to cadmium in one week and it will be increase with concentration and duration of toxin, as it was seen highest amount of lesions at the end of experiment within last dose.
