meristic variation


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meristic variation

Variation in number as opposed to kind.
See also: variation

meristic variation

numerical variation in taxonomic characters such as numbers of bristles, vertebrae, spots etc.
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This view was based largely on the similarity of reaction norm shape across species and further supported by the observation that different environmental factors that affected developmental rate in the same way had similar effects on meristic variation (Taning 1952; Barlow 1961; Fowler 1970; Lindsey and Arnason 1981).
Temperature-controlled meristic variation in the salamander Ambystoma gracile.
In addition, there is abundant evidence of at least partial genetic control of morphological and meristic variation between and within fish populations (e.