M Khoshnamvand, Sh Kaboudvandpour, F Ghiasi,
Volume 3, Issue 3 (10-2010)
Abstract
Backgrounds and Objectives:There have been always concerns regarding to consumption of aquatic products, particularly fish, due to the possibility of heavy metals bioaccumulation in aquatic creatures organs, throughout the world.Aresearch project was carried out to assess the level of concentrated total mercury in different tissues of Silver carp as the most consumed fish from Sanandaj Ghesglagh reservoir in the region.
Materials andMethods:Twenty four silver carp were captured randomly during July to December 2009. Prior measuring mercury concentrations in white muscle, red muscle and liver tissues by AdvancedMercuryAnalyzer (Model Leco, 254AMA) on the dry weight basis, biometry procedure was done.
Results: Mean accumulated mercury in white muscle, red muscle and liver tissues were 367 (S.E.± 26.43), 311 (S.E.± 32.22) and 251 (S.E.± 28.70) ng gr -1 on the dry weight basis, respectively. Pair comparisons between the level of concentrated mercury in all tissues, except white muscle tissues (F5, 18 = 1.52, P = 0.2332) showed a significant difference (P < 0.05).
Conclusion: The level of accumulated mercury in muscle and liver tissues of all samples weighted above 850 grams were higher than the established limits by WHO, FAO and EPA. Our results emphasis that the consumption of silver carp from Sanandaj Gheshlagh Reservoir might place the health of all those peoples who live in the region at risk.
Abdulreza Mashroofeh, Alireza Riyahi Bakhtiari, Mohammad Pourkazemi,
Volume 6, Issue 3 (12-2013)
Abstract
Background and objective: Metal pollution has always been a major cause of contamination of environment and is considered as a major concern for food health. Worldwide, sturgeons are an important source of food and income. In this study, the human health risk due to consumption of caviar and muscle of Persian sturgeon (Acipenser persicus) were evaluated by measuring the concentrations of cadmium, nickel, vanadium and zinc in caviar and muscle samples.
Material and Methods: A total number of 24 samples of Persian sturgeon were collected from two important sturgeon fishery zones in Guilan and Mazandaran Provinces and were stored at −20°C until chemical analysis. About one gram of each sample dried was added to 10 ml of concentrated (65%) supra-pure HNO3 (Merck, Darmstadt, Germany) in a Teflon PTFE tube and then it was incubated for 1 h at 40 °C in a hot block digester, followed by heating at 140 °C for 3 h. The samples digested were diluted to a measured volume using double deionized water. Samples were filtered through Whatman No. 1 filter paper, and the filtrate was stored until metal determination.
Results: Mean Cd, Ni, V and Zn concentrations in muscle tissues were 0.005 ± 0.002, 0.06 ± 0.03, 0.13 ± 0.04 and 7.49 ± 3.07 µg/g wet weight basis respectively. The mean Cd, Ni, V and Zn concentrations in caviar samples were 0.007 ± 0.006, 0.09 ± 0.07, 0.12 ± 0.15 and 21.23 ± 5.75 µg/g wet weight basis respectively.
Conculation: The mean concentrations of Zn, Cd and V in caviar and muscle samples were less than the permissible limits proposed by the United Kingdom's Ministry of Agriculture, Fisheries and Food (MAFF 2000) and World Health Organization (W.H.O.). The guidelines for Cd, V and Zn are 0.2, 0.5 and 50 µg/g wet weight respectively. Therefore, the measured concentrations for these particular metals are below the published guidelines, and the levels would appear not to constitute any threat to the human population that may consume sturgeon or caviar obtained from these study locations.
