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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 28, No. 1, 2007, pp. 68-72
Bioline Code: zr07012
Full paper language: English
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 28, No. 1, 2007, pp. 68-72

 en Polymorphism and Morphotype Transformations in the Rotifer ( Brachionus calyciflorus check for this species in other resources )
YIN Xu-wang, NIU Cui-juan

Abstract

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 200x 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.

Keywords
Brachionus calyciflorus; Morphotype; Polymorphism; Posterolateral spine

 
© Copyright 2007 Kunming Institute of Zoology, the Chinese Academy of Sciences
Alternative site location: http://www.zoores.ac.cn/

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