Geographic variation in animal colour polymorphisms and its role in speciation

@article{McLean2014GeographicVI,
  title={Geographic variation in animal colour polymorphisms and its role in speciation},
  author={Claire A. McLean and Devi M Stuart-Fox},
  journal={Biological Reviews},
  year={2014},
  volume={89}
}
Polymorphic species, in which multiple variants coexist within a population, are often used as model systems in evolutionary biology. Recent research has been dominated by the hypothesis that polymorphism can be a precursor to speciation. To date, the majority of research regarding polymorphism and speciation has focused on whether polymorphism is maintained within a population or whether morphs within populations may diverge to form separate species (sympatric speciation); however, the… Expand

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References

SHOWING 1-10 OF 133 REFERENCES
Accelerated speciation in colour-polymorphic birds
TLDR
The results provide empirical support for the general proposition, dating from classical evolutionary theory, that colour polymorphism can increase speciation rates and are corroborated by evidence from a species-level molecular phylogeny of passerines that polymorphic species tend to be younger than monomorphic species. Expand
Selective loss of polymorphic mating types is associated with rapid phenotypic evolution during morphic speciation
TLDR
Polymorphism loss was associated with accelerated evolution of male size, female size, and sexual dimorphism, which suggests that polymorphism loss can promote rapid divergence among populations and aid species formation. Expand
Range limits, large-scale biogeographic variation, and localized evolutionary dynamics in a polymorphic damselfly
TLDR
Investigation of population morph frequencies in a sex-limited heritable colour polymorphic damselfly with three discrete female morphs finds this polymorphism is highly dynamic, with stable morph frequencies at the core of the species range but fluctuating morph dynamics at the range limits. Expand
Did historical events shape current geographic variation in morph frequencies of a polymorphic damselfly
TLDR
It is suggested that the species' evolutionary history, such as random genetic drift during recolonization, may also be important in explaining the current geographical distribution of female morph frequencies. Expand
No evidence of genetic differentiation between anoles with different dewlap color patterns.
TLDR
Dwlap color variation in Anolis apletophallus appears to be a polymorphism rather than an indicator of 2 fully or partially reproductively isolated populations, with little genetic differentiation between populations or individuals with different dewlap morphs. Expand
The influence of stochastic and selective forces in the population divergence of female colour polymorphism in damselflies of the genus Ischnura
TLDR
Overall, the results indicate that both selective and stochastic processes operate on these colour polymorphisms, and suggest that the relative importance of factors varies between geographical regions. Expand
GEOGRAPHIC VARIATION, FREQUENCY‐DEPENDENT SELECTION, AND THE MAINTENANCE OF A FEMALE‐LIMITED POLYMORPHISM
TLDR
This work proposes that Brown anole lizards exhibit a dorsal pattern polymorphism that is expressed only in females that is maintained by temporal variation in selection coupled with the sheltering of alleles via a two‐locus inheritance pattern and sex‐limited expression. Expand
Linking color polymorphism maintenance and speciation.
TLDR
The survey reveals that several mechanisms, some operating between populations and others within them, can contribute to both color polymorphism persistence and speciation, and suggests that diverse forms of within-population sexual selection can generate negative frequency dependence and initiate reproductive isolation. Expand
Colour polymorphism in birds: causes and functions
TLDR
Findings support the hypothesis that colour polymorphism probably evolved under selective pressures linked to bird detectability as affected by variable light conditions during activity period as well as selective agents may be prey, predators and competitors. Expand
Associations of variable coloration with niche breadth and conservation status among Australian reptiles.
TLDR
It is found that species with variable color patterns have larger ranges, utilize a greater diversity of habitat types, and are underrepresented among species currently listed as threatened. Expand
...
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