expression, noun
Bergmann's rule
A biological principle stating that within a broadly distributed taxonomic clade, populations and species of larger size are found in colder environments, and species of smaller size are found in warmer regions.
ベルクマンの法則によると、寒い地域の動物は体が大きくなる傾向がある。
According to Bergmann's rule, animals in colder regions tend to have larger bodies.