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)Komatsu, Kazuki*; Iwasaki, Tsugumi*; Murata, Kosuke*; Yamashiro, Hideaki*; Goh, V. S. T.*; Nakayama, Ryo*; Fujishima, Yohei*; Ono, Takumi*; Kino, Yasushi*; Shimizu, Yoshinaka*; et al.
Reproduction in Domestic Animals, 56(3), p.484 - 497, 2021/03
Times Cited Count：10 Percentile：83.43(Agriculture, Dairy & Animal Science)We have established an archive system of livestock and wild animals from the surrounding ex-evacuation zone. Wildlife within the alert zone have been exposed to low-dose-rate (LDR) radiation for a long and continuous time. In this study, we analysed the morphological characteristics of the testes and in vitro fertilization (IVF) capacity of cryopreserved sperm of raccoons from the ex-evacuation zone of the FDNPP accident. This study revealed that the chronic and LDR radiation exposure associated with the FDNPP accident had no adverse effect on the reproductive characteristics and functions of male raccoons.
Aoki, Kenji*; Hibiya, Keisuke*; Shiogama, Yukihiro*; Toida, Masaru*; Yamamoto, T.*; Yoshida, Hiroshi*; Banno, K.*; Kubota, T.*; Shimizu, Y.*; Okutsu, Kazuo*; et al.
PNC TJ1100 94-001, 69 Pages, 1994/02
None
Yoshida, Hiroshi*; Nishi, K.*; Isobe, T.*; Banno, K.*; Sawauchi, Y.*; Shimizu, Y.*; Shiozaki, N.*; Tanaka, K.*; Furuichi, Mitsuaki*
PNC TJ1100 93-002, 118 Pages, 1993/02
None
Yoshida, Hiroshi; Naruse, Yuji; Yamaoka, Mitsuaki*; ; ;
JAERI-M 92-088, 105 Pages, 1992/06
no abstracts in English
Yoshida, Hiroshi*; Nishi, K.*; Isobe, T.*; Banno, K.*; Sawauchi, Y.*; Ishihara, K.*; Nakajima, K.*; Tanaka, K.*; Furuichi, Mitsuaki*
PNC TJ1100 92-002, 85 Pages, 1992/02
no abstracts in English
Yoshida, Hiroshi*; Nishi, K.*; Isobe, T.*; Banno, K.*; Sawauchi, Y.*; Ishihara, K.*; Furuichi, Mitsuaki*
JNC TJ1400 2005-009, 150 Pages, 1992/02
JNC-TJ1400-2005-009.pdf:12.18MB
no abstracts in English
Nakanishi, Takahiro; Tsuruta, Tadahiko; Funaki, Hironori; Sakuma, Kazuyuki; Miura, Tomisato*; Yoshida, Mitsuaki*
no journal, ,
To elucidate the mechanism of transport of dissolved radiocesium to masu trout, a feeding experiment was conducted in a culture pond introduced with mountain stream water (dissolved 
Cs concentration: 0.1 - 0.2 Bq/L) using a non-contaminated bait. The Cs concentration in the muscle of the adult masu trout (n = 10) was relatively high, showing individual differences (30 - 200 Bq/kg-wet). Pond bottom gravel was found in their stomach, suggesting a source of Cs other than bait and stream water. As a result of dietary analysis using stable isotope ratios, the contribution of aquatic organisms was higher in masu trout with higher Cs concentration in the muscle. This suggests that the Cs concentration in masu trout does not exceed the Japanese limit of 100 Bq/kg for general foodstuffs by transport only from the dissolved Cs.
Fujishima, Yohei*; Suzuki, Masatoshi*; Goh, V. S. T.*; Ariyoshi, Kentaro*; Kasai, Kosuke*; Nakata, Akifumi*; Kino, Yasushi*; Oka, Toshitaka; Shinoda, Hisashi*; Shimizu, Yoshinaka*; et al.
no journal, ,
After the Fukushima Daiichi Nuclear Power Plant accident, the surrounding environment was contaminated with radionuclides. Although the ambient dose rates are decreasing, prolonged effects of chronic low-dose exposure on animals are expected to be seen in the coming years. It is necessary to assess the effects of radioactivity on the wild animals in this area to better understand about the risk of low dose radiation. The chromosome translocation frequency of Japanese macaques were significantly higher in Fukushima groups comparing from control groups in Miyagi. Furthermore, chromosome translocation frequencies tended to correlate between external doses or internal dose-rates. However, chromosome translocation frequency was decreasing year by year, which may reflect restoration of environments such as decreasing of ambient dose-rates and decontamination efforts.
