کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8080416 | 1521553 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The role of salinity in the trophic transfer of 137Cs in euryhaline fish
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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چکیده انگلیسی
In order to better understand the influence of changing salinity conditions on the trophic transfer of 137Cs in marine fish that live in dynamic coastal environments, its depuration kinetics was investigated in controlled aquaria. The juvenile turbot Scophthalmus maximus was acclimated to three distinct salinity conditions (10, 25 and 38) and then single-fed with compounded pellets that were radiolabelled with 137Cs. At the end of a 21-d depuration period, assimilation efficiencies (i.e. AEsâ¯=â¯proportion of 137Cs ingested that is actually assimilated by turbots) were determined from observational data acquired over the three weeks. Our results showed that AEs of 137Cs in the turbots acclimated to the highest salinity condition were significantly lower than for the other conditions (pâ¯<â¯0.05). Osmoregulation likely explains the decreasing AE observed at the highest salinity condition. Indeed, observations indicate that fish depurate ingested 137Cs at a higher rate when they increase ion excretion, needed to counterbalance the elevated salinity. Such data confirm that ambient salinity plays an important role in trophic transfer of 137Cs in some fish species. Implications for such findings extend to seafood safety and climate change impact studies, where the salinity of coastal waters may shift in future years in response to changing weather patterns.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Radioactivity - Volume 189, September 2018, Pages 255-260
Journal: Journal of Environmental Radioactivity - Volume 189, September 2018, Pages 255-260
نویسندگان
Simon Pouil, François Oberhänsli, Peter W. Swarzenski, Paco Bustamante, Marc Metian,