بررسی غلظت فلزات سنگین در ماهی بیاه در رودخانه کارون، استان خوزستان

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد گروه شیلات واحد علوم و تحقیقات خوزستان دانشگاه آزاد اسلامی، اهواز

2 استادیار، دانشکده کشاورزی و منابع طبیعی، دانشگاه آزاد اسلامی، اهواز

3 دانشجوی کارشناسی ارشد گروه شیلات، واحد علوم وتحقیقات خوزستان، دانشگاه آزاد اسلامی، اهواز

چکیده

این تحقیق به‌منظور بررسی غلظت فلزات سنگین سرب، جیوه، کادمیم، منگنز، آهن، روی و مس در بافتهای عضله، کبد و آبشش ماهی بیاه در رودخانه کارون در استان خوزستان انجام شد. به‌این منظور نمونه‌برداری در زمستان 1388 صورت پذیرفت. پس از بیومتری 72 نمونه صید شده، بافتهای عضله، کبد و آبشش جداسازی شدند. آماده‌سازی و آنالیز نمونه‌ها طبق روش استاندارد MOPPAM صورت گرفت. اندازه‌گیری غلظت فلزات اندامهای مورد مطالعه توسط روش هضم خشک و با کمک دستگاه جذب اتمی در آزمایشگاه انجام شد. نتایج این تحقیق نشان داد که میانگین غلظت فلزات سنگین در بافت عضله حداقل و در بافت آبشش حداکثر است. در اندامهای مختلف ماهی بیاه غلظت آهن به‌ترتیب بیشتر از روی، سرب، منگنز، کادمیم، مس و جیوه بود (P<0.05). بین میزان تجمع فلزات سرب، جیوه، کادمیم، آهن و مس در بافتهای عضله، کبد و آبشش یک رابطه خطی مثبت و معنی‌دار وجود داشت (P<0.05). روی در عضله و کبد اختلاف معنی‌داری نداشت، اما در عضله و کبد با آبشش اختلاف معنی‌داری نشان داد (P<0.05). منگنز در کبد و آبشش اختلاف معنی‌داری نداشت، اما در کبد و آبشش با عضله، اختلاف معنی‌دار بود (P<0.05).    

کلیدواژه‌ها


عنوان مقاله [English]

Assessment of Heavy Metals Concentration of Fish (Liza abu) in Karoon River, Khouzestan Province

نویسندگان [English]

  • Mahboubeh Beheshti 1
  • Abolfazl Askari Sari 2
  • Mohammad Velayatzadeh 3
1 M.Sc. Student of Fisheries, Khouzestan Sciences and Research Branch, Islamic Azad University, Ahwaz
2 Assist. Prof., College of Agriculture and Natural Resources, Islamic Azad University, Ahwaz
3 M.sc. Student of Fisheries, Khouzestan Sciences and Research Branch, Islamic Azad University, Ahwaz
چکیده [English]

This study investigates the presence of heavy metals such as copper, iron, zinc, mercury, lead, cadmium and manganes in muscle, liver and gill of fish (L.abu) in the Karoon River, in Khuzestan province. Samples were collected in winter 2010. After the biometric data of 72 specimens were recorded the samples of muscle, liver and gill were analysed. Sample preparation and analysis was done according to MOPPAM method. The concentrations of heavy metals in the dry digested samples of tissues were measured using Atomic Absorption Spectrophotometer (AAS). The results of this study showed that the average concentrations of heavy metals were negligible and at maximum value in muscle and giil tissues, respectively. Iron concentration was showed to be higher than those of zinc, lead, manganese, cadmium, copper and mercury in different organs of fish (Liza abu). (P<0.05). Accumulation of lead, mercury, cadmium, iron and copper in muscle, liver and gill was highly significant and there were positive linear relationship between them (p<0.05). Concentration of  Zinc in muscle and liver were not significantly different, but there were significant difference between muscle and liver with gills (p<0.05). Manganese concentration was determined in liver and gill showed no significant difference but it was significant difference between liver and gill with muscle (P<0.05). The results of the present study suggest that higher accumulation of heavy metals in liver and gills can be good environmental indicators of metal stress in Liza abu.

کلیدواژه‌ها [English]

  • heavy metals
  • Liza abu
  • Karoon
  • Khouzestan province
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