Evolution of Facultative Paedomorphosis in Salamanders

@article{Whiteman1994EvolutionOF,
  title={Evolution of Facultative Paedomorphosis in Salamanders},
  author={Howard H. Whiteman},
  journal={The Quarterly Review of Biology},
  year={1994},
  volume={69},
  pages={205 - 221}
}
  • H. Whiteman
  • Published 1 June 1994
  • Biology
  • The Quarterly Review of Biology
In some salamander species the retention of larval characteristics in sexually mature adults (paedomorphosis) is an alternative to metamorphosis. In many species paedomorphosis is facultative, thus offering a unique opportunity to test predictions on the evolution of life history variation. Here I expand upon a previous hypothesis ("paedomorph advantage") and present two alternative selection mechanisms ("best of a bad lot" and "dimorphic paedomorph" hypotheses) for the maintenance of… 
Evolutionary ecology of facultative paedomorphosis in newts and salamanders
TLDR
The facultative paedomorphosis system is ripe for future studies encompassing ecology, evolution, behaviour, endocrinology, physiology, and conservation biology, and few other systems have been broad enough to provide varied research opportunities on topics as diverse as phenotypic plasticity, speciation, mating behaviour, and hormonal regulation of morphology.
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TLDR
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TLDR
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EVOLUTION OF PAEDOMORPHOSIS IN PLETHODONTID SALAMANDERS: ECOLOGICAL CORRELATES AND RE‐EVOLUTION OF METAMORPHOSIS
TLDR
It is shown for the first time using phylogenetic comparative methods that paedomorphosis is highly correlated with cave‐dwelling, arid surface environments, and small geographic range sizes, providing insights into both the causes and consequences of this major life history transition.
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TLDR
Males were more likely to become paedomorphs than females and did so under a greater range of body sizes than females, signifying a critical role for gender in this polyphenism, which emphasizes that the same phenotype can be adaptive under different environmental and genetic contexts.
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TLDR
While morph switching did occur in this population, it involved a relatively low proportion of the paedomorphs (approx. 12%), suggesting that metamorphosis is not favoured in the study population.
Adaptive significance of facultative paedomorphosis in Triturus alpestris (Amphibia, Caudata): resource partitioning in an alpine lake
TLDR
This study indicates habitat partitioning between morphs involving dietary differences in an alpine lake, and specific benefits and costs of each ontogenetic pathway may allow their coexistence in this deep and fishless lake.
High gene flow between alternative morphs and the evolutionary persistence of facultative paedomorphosis
TLDR
Using microsatellite data of coexisting paedomorphic and metamorphic palmate newts (Lissotriton helveticus), it is found that they formed a panmictic population, which evidences sexual compatibility between the two phenotypes.
Paedomorphosis in the Ezo salamander (Hynobius retardatus) rediscovered after almost 90 years
TLDR
The rediscovery of paedomorphs of H. retardatus is reported, which were collected from a pond in the south Hokkaido in December 2020 and April 2021 and demonstrated that they were sexually compatible with metamorphosed females, thus, confirming them to be paedomomorphs.
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