Publications by authors named "Kei Yonekura"
Zinc chloride influences embryonic development, growth, and Gh/Igf-1 gene expression during the early life stage in zebrafish (Danio rerio).
Comp Biochem Physiol C Toxicol Pharmacol
April 2020
Although zinc is an essential element for organisms, excess zinc exposure is harmful. We assessed the possible negative influence of zinc (Zn) on the freshwater fish Danio rerio during its early life stage by using Organization for Economic Cooperation and Development test guideline no. 210.
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- The study investigates how different species of Oryzias (medaka fish) are affected by salinity during embryo development to evaluate their usefulness as models for assessing environmental chemical impacts in aquatic ecosystems.
- Oryzias latipes (freshwater), Oryzias melastigma (brackish), and Oryzias javanicus (saltwater) were compared for their toxicity responses to organotin pollutants, specifically triphenyltin and tributyltin.
- Results showed O. latipes struggled in high salinity, while the other species adapted well; however, all three had similar toxicity thresholds, suggesting Oryzias are good candidates for studying chemical effects across varying water types.
The lethal effects of chemicals is a serious concern to the protection of ecosystems, and the OECD TG 212 was established to estimate the lethal and sublethal effects on embryo and sac-fry stages of fish. It is still unclear, however, whether this test can effectively estimate the impacts of chemicals using marine fish. Therefore, this study aimed to use a recognized testing method on the marine fish Oryzias javanicus, and to assess differences in response to organotin compounds between a freshwater congener (Oryzias latipes) and O.
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