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Inequality in the distribution of 137Cs contamination within freshwater fish bodies and its affecting factors
https://repo.qst.go.jp/records/81999
https://repo.qst.go.jp/records/819997391490a-afd8-44dd-b169-031855456733
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-10-19 | |||||
| タイトル | ||||||
| タイトル | Inequality in the distribution of 137Cs contamination within freshwater fish bodies and its affecting factors | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Ishii, Nobuyoshi
× Ishii, Nobuyoshi× Furota, Toshio× Kagami, Maiko× Tagami, Keiko× Uchida, Shigeo× Nobuyoshi, Ishii× Keiko, Tagami× Shigeo, Uchida |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Contamination of freshwater fishes with 137Cs remains as a serious problem in Japan, nearly 10 years after the Fukushima nuclear power plant accident, but there is limited information on the distribution of 137Cs contamination in fish body bodies. The 137Cs distribution can be used for the estimation of internal radiation exposure through the consumption of fish and for the dose estimation of fish themselves. In this study, the 137Cs distribution in the bodies of 8 freshwater fish species was investigated as percentages of total body burden for fish inhabiting Lake Inba. Fish samples were caught in stake nets placed close to the shore approximately once a month. After the measurement of body length and fresh weight, the radioactivities of 137Cs in muscle, internal organs, spawn, milt and bone were assayed using a high-purity germanium detector. Analysis of all fish samples showed that the 137Cs distribution was highest in muscle (54%), followed by internal organs (7.8%), spawn (7.4%), milt (3.2%) and bone (1.2%). Among fish species, the highest proportion of 137Cs in muscle was detected in largemouth bass (71.1%)，followed by snakehead (68.6%), channel catfish (62.5%), common carp (61.5%), barbel steed (57.8%), silver carp (57.0%), bluegill (53.4%), and crucian carp (49.8%). These results suggested that the 137Cs in muscle was likely to be high in piscivorous fishes compared to omnivorous fishes，especially crucian carp. The proportion of 137Cs in muscle of crucian carp was not explained either by body length or fresh weight. However, a positive correlation was found between the proportion of 137Cs in muscle and the condition factor which was an indicator of nutritional status calculated from a length-weight relationship. This correlation implied that more 137Cs accumulated in muscle tissue of a fish species with high nutritional status. This is the first study to show that condition factor is more important than body length and wet weight in explaining the high proportion of 137Cs in muscle tissues, at least for crucian carp. | |||||
| 書誌情報 |
Scientific Reports 巻 11, p. 5769, 発行日 2021-03 |
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| 出版者 | ||||||
| 出版者 | Nature | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 2045-2322 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1038/s41598-021-85291-6 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.nature.com/articles/s41598-021-85291-6 | |||||
