نحوه توزیع جیوه در بافت های مختلف ماهی شانک زرد باله (Acanthopagrus latus) خور موسی، خلیج فارس

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد آلودگی دریا، گروه بیولوژی دریا، دانشکدة علوم دریایی و اقیانوسی، دانشگاه علوم و فنون دریایی خرمشهر، ایران

2 استادیار گروه زیست‌شناسی دریا، دانشکدة علوم دریایی و اقیانوسی، دانشگاه علوم و فنون دریایی خرمشهر، ایران

3 استادیار گروه شیمی دریا، دانشکدة علوم دریایی و اقیانوسی، دانشگاه علوم و فنون دریایی خرمشهر، ایران

چکیده

 





چکیده






در این مطالعه غلظت جیوه در بافت‌‌های مختلف ماهی شانک زرد باله (Acanthopagrus latus) صیدشده از پنج یک از خوریات خور موسی (زنگی، جعفری، پتروشیمی، غزاله و مجیدیه) اندازه‌گیری شد. نمونه‌های بافتی در اسید هضم و با استفاده از روش جذب اتمی ارزیابی شدند. به طور کلی الگوی پراکنش جیوه در خوریات مورد مطالعه به شکل مجیدیه ≈ غزاله > پتروشیمی ≈ جعفری > زنگی بود. مشاهدة بیشترین غلظت جیوه در خورهای مجیدیه و غزاله را می‌توان ناشی از قرارگیری این دو خور در بخش انتهایی خور موسی، تبادلات کمتر با آب‌های آزاد، انتقال آلاینده‌ها از طریق جریان جزر و مدی، وجود اسکلة صادرات نفت و ریزش‌های نفتی، و احتمالاً وجود بستر مناسب برای متیلاسیون بیشتر جیوه بیان کرد. محاسبة نسبت عضله به کبد نیز نشان داد که فقط وضعیت خور زنگی به شرایط ثابت محیطی نزدیک است. در نهایت الگوی تجمع جیوه در بافت‌های ماهی شانک زرد باله به صورت کبد > عضله > پوست ≈ استخوان ≥ باله ≈  فلس بود و نشان می‌داد که تجمع بالای جیوه در بافت‌های کبد و عضله رخ می‌دهد که دلیل آن گستردگی بالای رگ‌های خونی، درصد بالای آب، و خصوصیات بیوشیمیایی و عملکردی این بافت‌هاست. همچنین، مشاهده شد که با افزایش بار آلودگی در خوریات، تفاضل میان میزان جیوة تجمع‌یافته در بافت‌های کبد و عضله بیشتر شد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Mercury Distribution in Different Tissues of Yellowfin seabream (Acanthopagrus latus) from the Musa Estuary, Persian Gulf

نویسندگان [English]

  • Sedigheh Babadi 1
  • Alireza Safahie 2
  • SeyyedMohammad Bagher Nabavi 2
  • Kamal Ghanemi 3
  • Mohammad-Taghi Ronagh 2
1 MSc. of Marine Pollution, Department of Marine Biology, Faculty of Marine Science, Khorramshahr University of Marine Science and Technology, Iran
2 Assistant Professor, Department of Marine Biology, Faculty of Marine Science, Khorramshahr University of Marine Science and Technology, Iran
3 Assistant Professor, Department of Marine Chemistry, Faculty of Marine Science, Khorramshahr University of Marine Science and Technology, Iran, Iran
چکیده [English]

Mercury concentrations in various tissues of Yellowfin seabream (Acanthopagrus latus) were
determined in five creeks of Musa Estuary – (1) Zangi, (2) Jafari, (3) Petroshimi, (4) Ghazaleh, and (5)
Majidieh. Tissue samples were digested in acid and their Hg concentrations were assayed by atomabsorption
method. Generally, the order of Hg concentrations in creeks was: Majidieh ≈ Ghazaleh >
Petroshimi ≈ Jafari > Zangi. High concentrations at Majidieh and Ghazaleh is due to the location of
the these creeks at the end sections of Musa Estuary, less water exchange with the open sea, transport
of pollutants by tidal currents, presences of oil export wharf and oil effusions, and probably
appropriate condition for the more Methylation of mercury. Calculation of muscle-liver ratio also
indicated that only the condition of Zangi creek is close to environmental static conditions. Finally the
order of mercury accumulation in body tissues of Yellowfin seabream was liver > muscle > skin ≈
bone ≥ fin ≈ scale, indicating high accumulation capacity of liver and muscle compared to other
tissues, probably due to developed vascularization, high percentage of water content, and biochemical
and functional characteristics of these tissues. It is also found that by the increase of mercury pollution
the difference between Hg accumulation in liver and muscle increased.

کلیدواژه‌ها [English]

  • liver/ muscle ratio
  • Mercury
  • muscle/ liver index
  • Pollution
  • yellowfin seabream

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