Reference : Larval growth in polyphenic salamanders: making the best of a bad lot
Scientific journals : Article
Life sciences : Aquatic sciences & oceanology
Life sciences : Environmental sciences & ecology
Life sciences : Zoology
Larval growth in polyphenic salamanders: making the best of a bad lot
Whiteman, Howard [Murray State University, KY, USA > > > >]
Wissinger, Scott A. [Allegheny College, PA, USA > > > >]
Denoël, Mathieu mailto [Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale >]
Mecklin, C. J. [Murray State University, KY, USA > > > >]
Gerlanc, N. M. [Murray State University, KY, USA > > > >]
Gutrich, J. J. [Southern Oregon University, OR, USA > > > >]
Springer Science & Business Media B.V.
Yes (verified by ORBi)
New York
[en] Polyphenism ; Density dependence ; Size structure ; Facultative paedomorphosis ; Ambystoma tigrinum nebulosum ; Tiger salamander ; Body condition ; Fitness ; Metamorphosis ; Life history ; Heterochrony ; Phenotypic plasticity ; Best of a bad lot ; Proximate causes ; Capture-Mark-Recapture ; CMR ; Polymorphism ; Mexican Cut ; RMBL ; Rocky Mountains ; Evolution ; Development ; Colorado ; Sex-specific metamorphosis ; Sex
[en] Polyphenisms are excellent models for studying phenotypic variation, yet few studies have focused on natural populations. Facultative paedomorphosis is a polyphenism in which salamanders either metamorphose or retain their larval morphology and eventually become paedomorphic. Paedomorphosis can result from selection for capitalizing on favorable aquatic habitats (paedomorph advantage), but could also be a default strategy under poor aquatic conditions (best of a bad lot). We tested these alternatives by quantifying how the developmental environment influences the ontogeny of wild Arizona tiger salamanders (Ambystoma tigrinum nebulosum). Most paedomorphs in our study population arose from slow-growing larvae that developed under high density and size-structured conditions (best of a bad lot), although a few faster-growing larvae also became paedomorphic (paedomorph advantage). 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. Our results emphasize that the same phenotype can be adaptive under different environmental and genetic contexts and that studies of phenotypic variation should consider multiple mechanisms of morph production.
Applied and Fundamental FISH Research Center - AFFISH-RC
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Fulbright ; National Science Foundation
Researchers ; Professionals
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