کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1739306 1016843 2008 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of chronic external gamma irradiation on growth and reproductive success of Daphnia magna
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
Effects of chronic external gamma irradiation on growth and reproductive success of Daphnia magna
چکیده انگلیسی

Aquatic invertebrates (water flea Daphnia magna) were exposed to low dose rates of external gamma radiation (from 0.4 to 31 mGy h−1) over a 23-day period (i.e. 5 broods). Gamma radiation caused changes in neither survival nor somatic growth. Mass-specific respiration rate was significantly lower at 31 mGy h−1 than in the control. Reproduction was affected through early release and reduced size of broods after 15 days of exposure at 31 mGy h−1 (broods 3–5), resulting in a 21% fecundity decrease at 31 mGy h−1 compared to the control. A decreased resistance of neonates to starvation was observed in relation to dose rates. Possible mechanisms of gamma radiotoxicity for daphnid reproduction and implications for radioprotection are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Radioactivity - Volume 99, Issue 1, January 2008, Pages 134–145
نویسندگان
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