Antifungal Effect of Potassium Chloride (KCl) on Water Mold Infection in Ayu Plecoglossus altivelis Eggs

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  • Miura Masayuki
    Yamanashi Prefectural Fisheries Technology Center
  • Hatai Kishio
    Laboratory of Fish Diseases, Nippon Veterinary and Life Science University
  • Oono Heisuke
    Laboratory of Fish Diseases, Nippon Veterinary and Life Science University
  • Kaji Nana
    Oshino Trout Hatchery, Yamanashi Prefectural Fisheries Technology Center
  • Nagura Jun
    Oshino Trout Hatchery, Yamanashi Prefectural Fisheries Technology Center

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  • Antifungal effect of potassium chloride (KCI) on water mold infection in ayu Plecoglossus altivelis eggs

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Abstract

The antifungal effects of potassium chloride (KCl) against Saprolenia diclina, S. parasitica and Achlya sp. and fungal infection in ayu Plecogrossus altivelis eggs were evaluated. Zoospore motility of the fungi was greatly inhibited within 1 min in 0.03% KCl, although hyphal growth and zoospore germination of the fungi were not inhibited at a concentration of 0.24% KCl. When fertilized ayu eggs were continuously kept in 0.03%, 0.06% and 0.12% KCl until the eyed-egg stage, treatment at concentrations of 0.06% and 0.12% apparently decreased the rate of fungal infection in three separate experiments. These concentrations showed no effect on the egg-eyed ratio, the subsequent hatching and the larval deformity rates. It was confirmed that KCl was a useful chemical to prevent mold infection in ayu eggs.

Journal

  • Fish Pathology

    Fish Pathology 44 (4), 166-171, 2009

    The Japanese Society of Fish Pathology

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