1969 年広島湾に異常発生した管棲多毛類の 1 種カサネカンザシによる養殖カキの被害について

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  • Notes on a Serious Damage to Cultured Oyster Crops in Hiroshima caused by a Unique and Unprecedented Outbreak of a Serpulid Worm, Hydroides norvegica (GUNNERUS) in 1969
  • 1969ネン ヒロシマワン ニ イジョウ ハッセイ シタ カンセイタモウルイ ノ 1シュ カサネカンザシ ニ ヨル ヨウショク カキ ノ ヒガイ ニ ツイテ

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It is well known that several mudworm, Polydora (Polychaetous annelids) often causes a serious damage to cultured bivalves, such as oysters and pearl oysters. During the autumn of 1969, a serpulid worm, Hydroides norvegica (GUNNERUS), outbroke in oyster beds located along the coastal areas of Hiroshima Bay and the vicinities (Text-fig. 2). More than 6, 000 rafts of the oyster (Crassostrea gigas (THUNBERG)) cultured in these areas were totally damaged by bitter competition with the serpulid worms for food as well as for space (Plate 9). The 1969 cultured oyster crops in Hiroshima Bay are estimated to be 63% of the average crops (32, 000 metric tons in flesh weight), and the total damage on the 1969 crops is estimated to be about \3, 000, 000, 000, due to this unique and unprecedented outbreak of the serpulid worm.

収録刊行物

  • 貝類学雑誌

    貝類学雑誌 30 (2), 75-_82-1_, 1971

    日本貝類学会

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