NDLI: Cesium-137 discharge into the freshwater fishery ground of grazing fish, ayu Plecoglossus altivelis after the March 2011 Fukushima nuclear accident

Content Provider	Springer Nature Link
Author	Iguchi, Kei’ichiro Fujimoto, Ken Kaeriyama, Hideki Tomiya, Atsushi Enomoto, Masahiro Abe, Shin ichiro Ishida, Toshinori
Copyright Year	2013
Abstract	The Fukushima nuclear accident led to deposition of radionuclides into the freshwater fishery ground of ayu Plecoglossus altivelis. For the purpose of more comprehensive understanding of the radioactive contamination, cesium-137 ($^{137}$Cs) was analyzed in running water, muddy sediment, attached algae, and ayu using samples from three river systems with different levels of contamination within Fukushima Prefecture in summer and autumn 2011. The amount of $^{137}$Cs contained in water as well as in sediment declined over an interval of two months, although the concentration in sediment samples was up to 10,000-fold higher than that in water samples. The changes in $^{137}$Cs concentration of algae showed different courses among the three river systems, the concentration being greater in autumn in the river systems with high and moderate radioactive contamination. $^{137}$Cs detected within a single stock of ayu appeared to be excreted rather rapidly with a calculated half-life of approximately 39 days, while the concentration ratio ranged from 10$^{3}$ to 10$^{4}$ l/kg, attaining higher levels than previously reported. These findings indicate that the most important pathway of $^{137}$Cs into ayu is via intake of algae as food but that the retention time of $^{137}$Cs inside ayu is relatively short.
Starting Page	983
Ending Page	988
Page Count	6
File Format	PDF
ISSN	09199268
Journal	Fisheries Science
Volume Number	79
Issue Number	6
e-ISSN	14442906
Language	English
Publisher	Springer Japan
Publisher Date	2013-08-27
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cesium-137 Effective half-life Freshwater ecosystem Plecoglossus altivelis Radioactive contamination Fish & Wildlife Biology & Management Freshwater & Marine Ecology Food Science
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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Characterization of novel microsatellite DNA markers in ayu Plecoglossus altivelis

Experimental analysis on the relationship between the population density of ayu Plecoglossus altivelis altivelis and fishery catch by “Tomozuri” angling

Effects of low fishmeal diets on the growth performance and physiological condition of ayu Plecoglossus altivelis

Identification and expression analysis of IRAK-4 cDNA and its gene from the ayu Plecoglossus altivelis altivelis

Multiple spawning of amphidromous type ayu Plecoglossus altivelis in a large river, Mogami River System

Evidence of multiple spawning in wild amphidromous type ayu

Cloning and expression analyses of a unique IgT in ayu Plecoglossus altivelis

Development of new self-feeding system for mass rearing of ayu Plecoglossus altivelis altivelis under artificial and natural light-dark cycles

Stress hormone responses in ayu Plecoglossus altivelis in reaction to different catching methods: comparisons between electrofishing and cast netting

Cesium-137 discharge into the freshwater fishery ground of grazing fish, ayu Plecoglossus altivelis after the March 2011 Fukushima nuclear accident

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