title: Acute Toxicity of Gamma Radiation to the Monogonont Rotifer Brachionus koreanus.
abstract: We examined the tolerance of the monogonont rotifer Brachionus koreanus in response to gamma radiation. In order to determine the median lethal dose (LD50) of rotifers against gamma radiation, we irradiated B. koreanus with gamma rays from 0 to 7000 grays (Gy). The LD50s were 2900 and 2300 Gy at 24 h (LD50-24 h) and 96 h (LD50-96 h) after irradiation, respectively. In addition, the no observed effect levels (NOEL) were 1500 and 1000 Gy at 24 and 96 h, respectively. This is the first determination of lethal doses of gamma radiation for B. koreanus, which could be useful in ecological assessment of gamma radiation toward aquatic life and could be useful for understanding toxic mechanisms over sublethal doses.
authors.affiliation: Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, 16419, South Korea.
authors.forename: Eun-Ji
authors.initials: EJ
authors.lastname: Won
authors.affiliation: Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, 16419, South Korea.
authors.forename: Jeonghoon
authors.initials: J
authors.lastname: Han
authors.affiliation: Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, 852-8521, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Hagiwara
authors.affiliation: Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Chiba, Japan.
authors.forename: Shoji
authors.initials: S
authors.lastname: Oda
authors.affiliation: Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Chiba, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Mitani
authors.affiliation: Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, 16419, South Korea. jslee2@skku.edu.
authors.forename: Jae-Seong
authors.initials: JS
authors.lastname: Lee
mesh_terms: D000818:Animals; D005720:Gamma Rays / Q000009:adverse effects*; D006801:Humans; D007928:Lethal Dose 50; D019055:No-Observed-Adverse-Effect Level; D012403:Rotifera / Q000528:radiation effects*
keywords: Brachionus koreanus; Gamma radiation; Half lethal dose; Rotifer