Well Seawater Obtained from Underground Limestone Layer in OKINAWA Islands, its Drawing Techniques, Physical, Chemical and Biological Characteristics and Performance of Shellfish (Abalone) Cultivation

• IMADA Osamu

  So-create

• MAEDA Hiroto

  Fac. Bioresources Mie University

• TANAKA Yoshito

  Fac. Fisheries Kagoshima University

Bibliographic Information

Other Title

• 沖縄琉球石灰岩島の地下海水の取水・性状・養殖特性
• オキナワ リュウキュウ セッカイガントウ ノ チカ カイスイ ノ シュスイ セイジョウ ヨウショク トクセイ

Abstract

As an example of underground brackish-seawater, well seawater from coral limestone layers was high lighted as a new characteristic oceanographic resource, that is free of bacteria and also percolating microorganisms like viruses and pico-plankton. The well seawater was brought up from a 70m depth under a metamorphic Ryukyu limestone layer drilled by a diamond cutting boring machine. The well seawater has a constant temperature of 24°C over the year, the same salinity and density as natural seawater, but an extremely small amount of microorganism. A shellfish (Abalone) cultivation test using well seawater continued successively over the last 2 years, and as a result, a growth rate that is about 2 times higher than the growth of natural juveniles in the open sea and a survival ratio of about 100 % free of diseases and microorganisms was obtained.

Journal

• Bulletin of the Society of Sea Water Science, Japan

  Bulletin of the Society of Sea Water Science, Japan 60 (2), 119-124, 2006

  The Society of Sea Water Science, Japan

Keywords

• Limestone
• Well seawater
• Microbeless
• Shellfish cultivation

Details

• CRID: 1390282680429326720
• NII Article ID: 10016745797
• NII Book ID: AN0018645X
• DOI: 10.11457/swsj1965.60.119
• COI: 1:CAS:528:DC%2BD28Xktl2it7s%3D
• NDL BIB ID: 7916499
• ISSN: 03694550
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7916499
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed