Bergmann's Rule

In zoology, Bergmann's Rule is a principle that correlates environmental temperature with body mass in warm-blooded animals. It asserts that within a species, the body mass increases with latitude and colder climate. Among mammals and birds, individuals of a particular species in colder areas tend to have greater body mass than individuals in warmer areas. For instance, White-tailed Deer are larger in Canada than in the Florida Keys. The rule is named after a nineteenth-century German biologist, Christian Bergmann. Bergmann's rule and Allen's rule are examples of clines frequently seen in mammals.
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Northern races of mammals and birds tend to be larger than Southern races of the same species.

B: (Biologi) kaidah Bergmann
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