| Budget Amount *help |
¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2018: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2017: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
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| Outline of Final Research Achievements |
Soft egg disease in salmonids causes loss of firmness of the egg membrane, increasing vulnerability of the embryo to external impact. In this study, we show that the disease is caused when bacteria from the environment gradually dissolve the surface of the egg membrane. We analyzed bacteria attached to egg membranes, and found candidate pathogenic bacteria to be short bacilli. Artificial culture of the pathogen was possible and a specific detection method was subsequently developed. Furthermore, we demonstrate how polyphenols can inhibit egg membrane softening.
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