کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6330621 1619784 2014 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An assessment of contaminant concentrations in toothed whale species of the NW Iberian Peninsula: Part II. Trace element concentrations
ترجمه فارسی عنوان
ارزیابی غلظت آلاینده ها در گونه های دندانی نهنگ شبه جزیره نیویورک: قسمت دوم. غلظت عناصر ردیابی
کلمات کلیدی
عناصر ردیابی، ذخیره سازی بیولوژیک، نهنگ های دندانی، شمال شرقی شبه جزیره ایبرین،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- Trace elements were measured in toothed whales from the NW Iberian Peninsula.
- Elemental concentrations were highly dependent on age and on ecological factors.
- Pilot whale and striped dolphin exhibited the highest Cd and Hg concentrations.
- Iberian toothed whales are not specially threatened by Hg and Cd exposure.

Concentrations of Ag, As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Se, V and Zn were investigated in the liver and kidney of the five most common toothed whales off the Northwest Iberian Peninsula (NWIP), specifically common dolphin, long-finned pilot whale, harbour porpoise, striped dolphin and bottlenose dolphin. Differences were observed in the bioaccumulation of the above elements between the five species. The differences are probably related to biological factors such as age and sex and/or to ecological factors specific to each species such as feeding habits or bioavailability of the various elements. However, no significant relationship was observed between element accumulation and sex. Pilot whale and striped dolphin showed the highest concentrations of renal Cd and the highest concentrations of hepatic Hg and Se, while bottlenose dolphin showed the highest concentrations of Hg in kidneys. An analysis of inter-elemental relationships showed strong positive correlations between Hg and Se in the five species, however most individuals have Hg:Se molar ratio less than 1:1 indicating an excess of Se compare to Hg. This result, probably reflect the high proportion of young animals in the sample available for this study and/or that these animals had a good health status. We also observed a positive correlation in striped dolphins between Cd and Cu and between Cd and Zn in kidneys. In addition, comparing with other studies world-wide, the element concentrations (Hg and Cd) found in Iberian toothed whales indicate that these populations are not specially threatened by Hg and Cd exposure in the area.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 484, 15 June 2014, Pages 206-217
نویسندگان
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