Species composition and horizontal distribution of the appendicularian community in waters adjacent to the Kuroshio in winter-early spring

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Species composition and horizontal distribution of appendicularians were investigated in waters adjacent to the Kuroshio, south of Honshu in winter–early spring. Twenty-one species belonging to 5 genera were found and the species composition was characterized by a strong dominance of Oikopleura longicauda and occasional dense occurrence of Fritillaria pellucida. Oikopleura longicauda was distributed rather uniformly throughout the study area while F. pellucida was usually only sparsely distributed, although it was sometimes found in dense concentrations at the stations close to the Kuroshio axis. Occurrence of O. dioica, a well-studied neritic species, was limited to the stations with a relatively shallow bottom and its relative importance in terms of abundance was small. Generally, the appendicularian biomass was less than one tenth of the copepod biomass in carbon. Nevertheless, the role of appendicularians in terms of secondary production was estimated to be smaller but comparable in magnitude to that of copepods, 1.7–202.3 mgC m−2 d−1 in the former and 30.0–185.2 mgC m−2 d−1 in the latter, because of their higher somatic growth rates and house production. Clearance rate of appendicularians was also estimated to be comparable to copepods, 3.1–591.3 L m−2 h−1 in the former and 49.0–462.1 L m−2 h−1 in the latter, owing to their much higher weight specific clearance rates.

収録刊行物

  • Plankton & benthos research  

    Plankton & benthos research 3(3), 152-164, 2008-08-01 

    日本プランクトン学会、日本ベントス学会

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各種コード

  • NII論文ID(NAID)
    10021907510
  • NII書誌ID(NCID)
    AA12130745
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    18808247
  • NDL 記事登録ID
    9638105
  • NDL 雑誌分類
    ZR1(科学技術--生物学)
  • NDL 請求記号
    Z54-J424
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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