「早岐瀬戸」締め切りが周辺真珠漁場に与える影響に関する研究-1-プランクトン相の現況と予想される変化

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  • ソウキセト シメキリ ガ シュウヘン シンジュ ギョジョウ ニ アタエル エイキョウ ニ カンスル ケンキュウ 1 プランクトンソウ ノ ゲンキョウ ト ヨソウ サレル ヘンカ
  • Studies of the Oceanographic Characteristics of Haiki Channel and the Adjacent Waters, and of Effects of Closing of the Channel on Pearl Farms―I.Present Status of Plankton-Biota and Its Presumptive Changes

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To elucidate presumptive changes in oceanographic characteristics of Haiki Channel and the adjacent waters by the closing of the Channel, the authors carried out the planktological investigations in September and November 1964, and January 1965. Results obtained and presumptions based thereon are as follows:― The present status of the plankton-biota in the above mentioned waters is "Sasebo type" (i.e. "Skeletonema type"). And, this status will not probably show remarkable changes, even if Haiki-Seto was closed, but there will take place an abnormal blooming of Skeletonema and the "Akashio" (red-tide). The authors assume that these phenomena will not probably threaten to kill pearl oysters, but the environmental conditions benefitable for Skeletonema will make drop value of pearl farms.

長崎大学水産学部研究報告, v.20, pp.14-21; 1966

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