日本から記載されたリムノンケア属 Limnoncaea カイアシ類の正体 : プランクトン学と寄生虫学の複合領域的研究の必要性  [in Japanese] The true nature of the enigmatic copepod genus Limnoncaea from plankton in Japan and the importance of parasito-planktology  [in Japanese]

Access this Article

Search this Article

Author(s)

    • 大塚 攻 OHTSUKA SUSUMU
    • 広島大学大学院生物圏科学研究科附属瀬戸内フィールド科学教育研究センター竹原ステーション Takehara Marine Science Station, Setouchi Field Science Center, Graduate School of Biosphere Science, Hiroshima University

Abstract

The history of an enigmatic copepod genus Limnoncaea Kokubo, 1914 is reviewed. Copepods of this genus had been recorded from plankton in many fresh/brackish lakes and ponds of Japan. It is recently concluded that Limnoncaea is relegated to a junior synonym of Ergasilus Nordmann, 1832, the species of which are mainly parasitic on fish. Here we explain how lack of interchange between the fields of planktology and parasitology prevented an earlier appreciation of this fact. Recently, postmated adult females are suggested to exhibit a dual life mode: (1) some ergasilids are permanently attached to the host; in some cases, accompanied with highly transformed bodies and appendages to avoid detachment (generally known life cycle in ergasilids); (2) others are loosely associated to the host; like copepodids and adult males, without such transformation. In addition, the latter kind of female carries egg-sacs with a relatively small number of eggs per sac (up to 20), in contrast to larger number of eggs carried by females that are permanently attached to the host. The latter type is known from plankton in the world. Complex life cycles of symbiotic copepods have so far caused several taxonomic confusions not only in fresh/brackish waters but also in marine regimes (e.g., Saphirella problem). Hence planktologists should erase the boundary between planktology and parasitology to understand the natural history of their subject organisms precisely.

Journal

  • Bulletin of the Plankton Society of Japan

    Bulletin of the Plankton Society of Japan 51(1), 13-24, 2004-02-25

    日本プランクトン学会

References:  100

Cited by:  6

Codes

  • NII Article ID (NAID)
    10029510522
  • NII NACSIS-CAT ID (NCID)
    AN00197015
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03878961
  • NDL Article ID
    6882387
  • NDL Source Classification
    ZR1(科学技術--生物学)
  • NDL Call No.
    Z18-1045
  • Data Source
    CJP  CJPref  NDL  IR  JASI 
Page Top