Volume 28 Issue 1
Jan.  2007
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YIN Xu-wang, NIU Cui-juan*. Polymorphism and Morphotype Transformations in the Rotifer (Brachionus calyciflorus)(in English). Zoological Research, 2007, 28(1): 68-72.
Citation: YIN Xu-wang, NIU Cui-juan*. Polymorphism and Morphotype Transformations in the Rotifer (Brachionus calyciflorus)(in English). Zoological Research, 2007, 28(1): 68-72.

Polymorphism and Morphotype Transformations in the Rotifer (Brachionus calyciflorus)(in English)

  • Received Date: 2006-08-16
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2007-02-22
  • The relationship of three Brachionus calyciflorus morphotypes (two short-spined, single-spined and spineless ones) was studied in the laboratory. Newly hatched females of each morphotype were cultured individually in an inorganic or Asplanchna-conditioned mediums, and the morphotype of their offspring were checked at 200× magnification. Females of each morphotype, cultured in the inorganic medium, could produce offspring of these three morphotypes in a single generation. Females of all three morphotyes could respond to specific Asplanchna-substances when they were cultured in Asplanchna-conditioned medium. Moreover, we observed that these three morphotype females could coexist in the medium and had three types of egg-bearing females. Based on the above observations we suggest that B. calyciflorus was a morphotype complex and has three basic morphotypes.
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