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タイトル
  • ja 親潮域における動物プランクトン研究の最近の進歩
  • en Recent advances in studies on zooplankton ecology in the Oyashio region
作成者
アクセス権 open access
主題
  • Other en Ecosystem structure
  • Other en Copepods
  • Other en Neocalanus
  • Other en Oyashio region
  • Other en Optical plankton counter
  • NDC 660
内容注記
  • Abstract en Recent advances in studies on zooplankton ecology in the Oyashio region were reviewed. In this review, the following three topics were argued : i) ecosystem structure in the region, ii) inter-annual changes in zooplankton biomass and iii) optical analysis on zooplankton samples. Annual mean biomass in the Oyashio region was estimated to be 23 g C m-2 and was dominated by mesozooplankton (34%), followed by phytoplankton (28%), heterotrophic bacteria (15%) and microzooplankton (14%). Within the mesozooplankton, large grazing copepods (i.e. Neocalanus spp., Eucalanus bungii and Metridia spp.) were the most important taxa to govern the seasonal and inter-annual variability. Through the analysis on zooplankton samples collected during 1950’s to present, inter-annual variability in mesozooplankton biomass was revealed to be related with the Pacific Decadal Oscillation (PDO) and climate regime shift. While the zooplankton size is important to determine the food quality for pelagic fishes and the mass flux to the deep ocean, detailed analysis on their size distribution is not made for most of the samples, because of the difficult and time consuming analysis involved. The recently advanced optical plankton counter (OPC) can measure the particle (＝plankton) with detailed size distribution (4096 size unit between 0.25 mm and 20 mm) within a short period, therefore the application of OPC on zooplankton samples may solve the problem in future.
出版者 en Faculty of Fisheries Sciences, Hokkaido University
日付
    Issued2011-06
言語
  • jpn
資源タイプ departmental bulletin paper
出版タイプ VoR
資源識別子 HDL http://hdl.handle.net/2115/47548
収録誌情報
    • PISSN 2186-1927
    • NCID AA12145888
      • en Memoirs of the Faculty of Fisheries Sciences, Hokkaido University
      • 巻53 号2 開始ページ13 終了ページ18
ファイル
    • fulltext p.13-18.pdf
    • 1.14 MB (application/pdf)
      • Issued2011-06
コンテンツ更新日時 2023-07-26