Impact assessment and estimation of hydrogen sulfide concentration in the shallow waters on <i>Ruditapes philippinarum</i> inhabiting

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  • アサリの生息する極浅い水深帯での硫化水素濃度の推定とその影響
  • Impact assessment and estimation of hydrogen sulfide concentration in the shallow waters on Ruditapes philippinarum inhabiting

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We investigated occurrence of blue tide in the field and experimented the effects of blue tide to Ruditapes philippinarum in the laboratory. Blue tide occurred several times each year on Omaemaha in inner part of Osaka Bay. Occurrence of blue tide corresponded weather condition. It could develop the relationship between ORP and pH in the field and estimate concentration of hydrogen sulfide in D.L. -1m inhabiting R. philippinarum. It was not recognized unequivocal effects of hydrogen sulfide to mortality rate of R. philippinarum under reductive environments. On the other hand, clearance rate of R. philippinarum was affected by hydrogen sulfide and did not recover early time.

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