Bergmann's rule

noun Berg·mann's rule \ˈbərg-mənz, ˈberg-\

Definition of Bergmann's rule

  1. :  a statement of the principle that within a polytypic wide-ranging species of warm-blooded animals the average body size of members of each geographic race varies inversely with the mean environmental temperature

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Origin and Etymology of bergmann's rule

after Karl Bergmann †1865 German biologist


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