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[Protista] Ciliate morphometrics should account for cycles

paul earl via protista%40net.bio.net (by pearl from dsi.uanl.mx)
Mon May 19 12:45:57 EST 2008

Morphometrics fails to identify closely related ciliates that have the 
same appearance, mostly because they vary in size through the clonal 
cycle. Humans recognize shape, whereas computer programs like 
Fisher-Mahalanobis Discriminant Analysis commonly are prone to recognize 
by size. Has-or-has-not produces rather few characters.

The morphogenesis of ciliates uses random distribution statistics for 
the taxonomy of ciliates, although the cell is cyclic and determined. 
The arithmetic mean (AM), the standard deviation (SD) and the mode (M) 
are determined, and so are genetic factors including clonal cycle 
effects. Some cell regulation has long been developed in Paramecium by 
James D. Berger and his associates.

It is now suggested that the mode of distance units with 10 % 
percentiles is the most informative and logically applicible descripter. 
Trigonometric variables should be used in morphometrics.

Paul R Earl

Universidad Autonoma de Nuevo Leon

San Nicalas, NL, Mexico

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