جستجوی مقالات مرتبط با کلیدواژه "liza aurata" در نشریات گروه "زیست شناسی"

The cesium-137 (Cs-137) is one of the most dangerous fission fragments from fissionable nuclides U-235, which it half-life is about 30/17 years. The Chernobyl accident was diffused a high concentration of radioactive pollutants especially Cs-137 in different areas. Since Iran is very close to accident area, it is necessary to study the contamination of radioactive material in the environment and living organisms. The research covers the health of muscle tissue of liza aurata to pollution of Cs-137 of center region in southern part of the Caspian sea in 2008. In this study 60 piece of liza aurata were obtained from fishing sites in Mazandaran province (in the central region of the southern coasts of the Caspian Sea). The Cs-137 activity measurement of muscle tissue was carried out by using of gamma spectrometry. The results of Cs-137 was compared by the International Atomic Energy Agency (IAEA) and the World Health Organization (WHO) at 10 Bk/Kg. Based on the results, Cesium-137 levels in muscle tissue were less than the detection limit in more than 90% of the fish samples. The radioactive material was within the permissible and standard range in the rest of the fishes (8.3%). This study has been confirmed the health of muscle tissue of Liza aurata muscle to pollution of radioactive Cs-137 in period and area of stud

The present study aimed to survey heavy and toxic metal pollution (lead and cadmium) in the southern Caspian Sea basin through Liza aurata</em> using geographic information system (GIS).  Samples of the gill tissue of adult Liza aurata</em> were taken in 10 stations over the southern coast of the Caspian Sea in spring and fall. Interpolation method, Kennedy density function, Moran test, and Gi* index in the GIS were used to determine the spatial distribution, density, zoning and distribution pattern of the metals. The uptake of lead and cadmium was 1.88 and 1.23 µg/g in spring, and 1.42 and 0.79 µg/g in fall, respectively. Analysis of GIS maps showed that concentration and centralization of both metals reduced from East to West. According to Moran test and Gi* index, the distribution of the metals had a strong and hot cluster pattern that reveals the accumulation and closeness of high-density polluted areas. Finally, it can be stated that the pollution of the eastern part of the Caspian Sea (Bandar Turkman and Khajeh-nafs) is higher than permissible international standard limits.

Genetic structure of golden mullet, Liza aurata, investigated in the Gomishan and Anzali wetlands using six microsatellite primer sets (Muce55, Muce37, Muso10, Muco16, Muso19, and Muso22). Totally 60 samples of adult golden mullet were collected from these regions. All primer sets as polymorphic loci were used to analyze the genetic variation. Analyses revealed that average of alleles (Na) per locus was 5.3 (range 3 to 9 alleles) and in regions, samples of Gomishan wetland 5.1 and Anzali wetland 5.5 respectively. All sampled regions contained private alleles. The average estimates of inbreeding coefficients (Fis and Fit) values of 6 microsatellites were positive. The average observed and expected heterozygosity was in Gomishan wetland 0.153 and 0.721 and Anzali wetland 0.328 and 0.747 respectively. Deviations from Hardy-Weinberg equilibrium were in all cases (P

Golden mullet is very important species and edible in Caspian sea areaDue to no microscopic study on the gill tissue in this species the recent research has been doneFor this purpose, 20, of fish after biometry were used.In this research fish collected for histological studies of the second gill arch on the left, then convert into smaller piece fixed in Bouin 's solution and incubated for 48 hAfter routine histological procedures,sectionsat 5 to 6 micronsthickness stained using (H&E), (PAS) and cover slip was done. In immunohistochemical studies, paraffin slides after the initial stages of preparation such as removal and discharge of ethanol in phosphate buffer saline solution and then rinsed in phosphate buffer saline solution that combines, of NaCl and Tween. In gill microscopic examination each blade as a thin layer of cells layed on the basement membrane and two side of the them were protected with Pilar cells. Flat membranes of the respiratory lamellae that are formed in large numbers mucous secreting cells. The other main cells in the chloride cells and surrounded by flat lining cells were higher at the junction between the lamellae and filaments. Immunohistochemical studies showed that the cells were exposed to a large number of filament epithelium and rarely in the epithelium of lamella.Recent study on gill epithelial cells of this species showed some similarities and differences with other species that have been addressed.

Heavy metal pollution can have devastating effects on the ecological balance of the recipient environment and a diversity of aquatic organisms. Among animal species, fishes are the inhabitants that cannot escape from the harmful effects of these contaminants. In the present research, during spring 2014, twenty-nine specimens of Liza aurata were collected from Bandar Anzali coast in Gilan province. The aim of this study was to provide information on heavy metal (Cd and Pb) concentrations in the muscles of this fish species and to evaluate the possible risk associated with their consumption. The levels of heavy metals were measured by GFAAS after digestion of the samples using concentrated acids. The results of this study showed that the average concentrations of cadmium and lead in muscle were 0.67 and 0.072 µg/g, respectively. The concentration of two metals in the present research were lower than the limits permitted by FAO, WHO, MAFF and NHMRC. The estimated daily intakes (EDI) of two metals through consumption of the Liza aurata fish by native people in the Bandar Anzali coast were well below the permissible tolerable daily intake for 70 kg person (PTDI70) set by EPA. Therefore, it can be concluded that no problems on human health would be raised at present from the consumption of Liza aurata fish from the Bandar Anzali coasts.

This study was carried out to evaluate some quality aspects such as lipid deterioration on Vacuum Packed (VP) brined golden mullet Liza aurata during 90 days of storage at 4ºC. Peroxide Value (PV) and thiobarbituric acid (TBA) were analysed to determine lipid deterioration at intervals of 0, 30, 60 and 90 days.The data was analyzed by Tukey test and ANOVA. Increasing in PV and TBA were found to be statistically significant in the VP brined golden mullet through out storage (P<0.05). This study showed that lipid deterioration can be considered as one of the chemical assessment to determine the shelf life of VP brined golden mullet during storage.Based on data the best shelf life was found 30 days for VP brined golden mullet stored at 4ºC.