کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4432795 1619942 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of aqueous, dietary and combined exposures of cadmium to Ceriodaphnia dubia
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Effects of aqueous, dietary and combined exposures of cadmium to Ceriodaphnia dubia
چکیده انگلیسی

While effects of water-borne metal exposures on freshwater animals have been well documented, the effect of dietary metal exposure is less understood but is gaining importance. However, little attention has been given to the importance of combining both exposure pathways. In this study, we compared effects of aqueous (‘water only’), dietary (‘food only’) and combined (‘water + food’) exposures of cadmium to the freshwater cladocerans, Ceriodaphnia dubia. Major test endpoints included survival, feeding rate and reproduction. The C. dubia three-brood reproduction tests were conducted according to the United States Environmental Protection Agency (U.S. EPA) methods. Three exposure scenarios were used: aqueous, dietary, and combined aqueous and dietary exposures. Results showed that all three exposures affected survival, feeding rate and reproduction of C. dubia. Interestingly, combined exposure showed contribution effects of aqueous and dietary exposures. Lower cadmium concentrations were needed in combined exposure to produce effects as compared to higher concentrations in aqueous or dietary exposure alone. These results demonstrated the potential importance of dietary and combined exposures for consideration of cadmium regulation and risk assessment of metals.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 385, Issues 1–3, 15 October 2007, Pages 108–116
نویسندگان
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