A review of Gloger's rule, an ecogeographical rule of colour: definitions, interpretations and evidence¶
Delhey. (2019). A review of Gloger's rule, an ecogeographical rule of colour: definitions, interpretations and evidence: definitions, interpretations and evidence. Biological Reviews.
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Domain-specific¶
- Gloger's Rule
- Gloger's Rule is the biogeographic regularity, first described by Constantin Wilhelm Lambert Gloger in 1833, that within a species of endotherms — most reliably birds, and secondarily mammals — more heavily melanin-pigmented forms tend to occur in more humid environments, especially toward the equator, while more lightly pigmented forms tend to occur in drier or more arid environments.
This sourceReview defining Gloger's rule as an ecogeographical rule of animal colouration, named for C.W.L. Gloger and whose simple version predicts darker, more heavily melanised endothermic animals in warmer and humid areas. Review reporting studies whose findings contradict the original definition of Gloger's rule (darker where cold) and judging that the simple version as originally defined may not be valid. Review evidence testing Gloger's rule - qualitative (N = 124) and meta-analytic (N = 38 studies, 241 effects) - which names camouflage and protection against parasites/pathogens as the two most plausible mechanisms.
Supported in partVerified against the publisher's abstract
“This rule is named after C.W.L. Gloger who was one of the first to summarise the associations between climatic variation and animal colouration, noting in particular that birds and mammals seemed more pigmented in tropical regions.”
- Gloger's Rule is the biogeographic regularity, first described by Constantin Wilhelm Lambert Gloger in 1833, that within a species of endotherms — most reliably birds, and secondarily mammals — more heavily melanin-pigmented forms tend to occur in more humid environments, especially toward the equator, while more lightly pigmented forms tend to occur in drier or more arid environments.
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