بررسی تجمع فلزات سنگین منگنز، کادمیوم، کروم و سرب در صدف محار Pinctada radiata (Bivalvia: Pterioida) در جزایر هندورابی و لاوان، خلیج فارس

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه شیلات، دانشکده منابع طبیعی، دانشگاه تهران، کرج

2 دانشگاه تهران،اکولوژی

3 پژوهشکده اکولوژی خلیج فارس و دریای عمان، بندرعباس

4 آزمایشگاه محیط زیست، پژوهشگاه علوم و فنون هسته ای، سازمان انرژی هسته ای ایران

5 گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران، کرج

چکیده

این تحقیق به‌منظور سنجش میزان منگنز، کادمیوم، کروم و سرب در بخش نرم صدف مرواریدساز محار در دو جزیرۀ هندورابی و لاوان انجام گرفت . 40 عدد صدف مرواریدساز محار با غواصی و در عمق 8-10 متر از جزایر لاوان و هندورابی تهیه شد. وزن کل، وزن پوسته و وزن بخش نرم صدف‌ها اندازه‌گیری شد. غلظت‌های منگنز، کادمیوم، کروم و مس با استفاده از دستگاه جذب اتمی تعیین شد. تفاوت غلظت فلزات سنگین نمونه‌های دو جزیره با استفاده از آزمون t مستقل بررسی شد. با استفاده از آزمون پیرسون، رابطۀ بین فلزات سنگین و وزن ‌صدف مورد بررسی قرار گرفت. بین غلظت سرب در بخش نرم صدف محار و وزن کفه در دو جزیرۀ هندورابی و لاوان اختلاف معنی‌داری وجود نداشت، اما بین غلظت کادمیوم، منگنز و کروم و وزن کل و وزن بخش نرم در بافت صدف محار در دو جزیره اختلاف معنی‌داری وجود داشت. آزمون پیرسون در جزیرۀ هندورابی نشان داد که بین جذب کادمیوم و منگنز و فاکتورهای وزنی صدف محار رابطۀ معنی‌داری وجود دارد. همچنین نتایج این آزمون در جزیرۀ لاوان نشان داد بین جذب کروم با وزن کل و وزن کفه اختلاف معنی‌داری وجود دارد. باتوجه به نتایج فوق، جمعیت هندورابی، به‌دلیل تحمل استرس کمتر، برای بازسازی ذخایر این گونه و تکثیر مصنوعی آن پیشنهاد می‌شود.

کلیدواژه‌ها


عنوان مقاله [English]

Accumulation of Mn, Cd, Cr and Pb in Pinctada radiata (Bivalvia: Pterioida) in the Hendourabi and Lavan Islands, the Persian Gulf

نویسندگان [English]

  • Moein Rajaei 1
  • Hadi Poorbagher 2
  • Hamid Farahmand 1
  • Mohammad Seddiq Mortazavi 3
  • Fereydoon Aflaki 4
  • Amir Hossein Hamidian 5
چکیده [English]

Concentrations of Mn, Cd, Cr and Pb were measured in soft tissues of P. radiata from the Hendourabi and Lavan Islands. Forty specimens were collected from each island from the depth 8-10 m using SCUBA. Total, shell and soft tissues weights were measured. Mn, Cd, Cr and Pb concentrations of the soft tissues were measured using the atomic absorption technique. A significant difference between specimens of the two Islands in the metal concentration and, total, shell and soft tissues weights were examined using a t‑test. No significant difference was detected between the specimens of the two Islands in Pb of soft tissues and the shell weight. There were significant differences between specimens of the two Islands in Cd, Mn, Cr of soft tissues, total and soft tissues’ weights. According to a Pearson test, there was a significant correlation between Cd concentration of soft tissues and weight parameters of P. radiata in individuals from the Hendourabi Island. Also, there was significant correlation between Cr concentration of the soft tissues and, total and shell weights. The present study suggests that the individuals from the Hendourabi Island are subjected to a lower level of stress than those from the Lavan Island and hence are more appropriate to be used for reproduction and restocking purposes.

کلیدواژه‌ها [English]

  • Heavy metals
  • Hendourabi
  • Lavan
  • Pinctada radiata
 

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