University of the Ryukyus · Faculty of Medicine

Research keywords統計学・進化生態学・行動生態学・生活史適応・メダカ・Non-destructive・elemental・analysis

This is a public-data preview. Personalized fit, contact angles, and saved workflows require sign-in.

• Non-destructive elemental analysis of prehistoric potsherds in the southern Ryukyu Islands, Japan: Consideration of the pottery surface processing technique in the boundary region between the Japanese Jōmon and Neolithic Taiwan2020 · Aoyama H.
• メダカ拡張一世代繁殖試験（MEOGRT）結果を用いたノニルフェノールの個体群レベルの影響予測2019 · <p>In this study, we assessed the population-level impacts of 4-nonylphenol (NP) on medaka fish based on a population matrix model developed and results of the medaka extended one-generation test (MEOGRT). The concentration-response relationships for the number of fertilized egg and the survival rate were estimated from results of the MEOGRT and were incorporated into the population model. Although the lowest observed effect concentration (LOEC) in the MEOGRT was reported to be 1.27 μg/L NP, the predicted population growth rates at NOEC and even at the maximum test concentration of 89.4 μg/L NP were higher than 1 (358 and 6.2, respectively). We also projected values of mean time to extinction at different concentration levels and corresponding reductions in carrying capacity (K). Based on the comparison of the projected population-level impacts with quantitative criteria used in fishery resource management and IUCN red list categorization, concentrations higher than NOEC can be acceptable. Overall, those results suggest that use of multiple criteria based on individual and population-level impacts rather than a limited number of criteria (such as LOEC and NOEC based on individual-level effects) would be important in ecological risk assessments.</p>
• A possible new oldest pottery group in the Southern Ryukyu Islands, Japan: Comparative analysis of elemental components of potsherds from the Shiraho-Saonetabaru Cave Site2019 · Yamagiwa K.
• Reproductive interference in live-bearing fish: the male guppy is a potential biological agent for eradicating invasive mosquitofish2019 · Tsurui-Sato K.

• 国内外来魚がメダカの地域個体群の遺伝的多様性に与える影響評価
• 沖縄本島における外来魚カダヤシおよびグッピー間の種間競争に関する人口動態学的解析
• メダカのオスの二次性徴形質と繁殖成功との関係
• ３次元的マイクロプラスチック調査と海産仔稚魚による誤食実態の解明

• Official profile