Reassessment of the environmental mechanisms controlling developmental polyphenism in spadefoot toad tadpoles

@article{Storz2004ReassessmentOT,
  title={Reassessment of the environmental mechanisms controlling developmental polyphenism in spadefoot toad tadpoles},
  author={Brian L. Storz},
  journal={Oecologia},
  year={2004},
  volume={141},
  pages={402-410}
}
  • B. L. Storz
  • Published 5 August 2004
  • Biology, Medicine
  • Oecologia
Identifying the environmental mechanism(s) controlling developmental polyphenism is the first step in gaining a mechanistic and evolutionary understanding of the factors responsible for its expression and evolution. Tadpoles of the spadefoot toad Spea multiplicata can display either a “typical” omnivorous or a carnivorous phenotype. Exogenous thyroxine and feeding on conspecific tadpoles have been accepted as triggers for development of the carnivorous phenotype on the basis of a series of… Expand
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TLDR
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TLDR
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References

SHOWING 1-10 OF 45 REFERENCES
POLYPHENISM IN SPADEFOOT TOAD TADPOLES AS A LOCALLY ADJUSTED EVOLUTIONARILY STABLE STRATEGY
  • D. Pfennig
  • Biology, Medicine
  • Evolution; international journal of organic evolution
  • 1992
TLDR
Examining the evolutionary factors maintaining two environmentally induced morphs in ponds of variable duration implies that morph determination in Scaphiopus is a locally adjusted evolutionarily stable strategy (ESS). Expand
The adaptive significance of an environmentally-cued developmental switch in an anuran tadpole
TLDR
Using shrimp density to induce morph differentiation enables tadpoles to respond to their environment adaptively as shrimp are most abundant in highly ephemeral ponds, where the faster developing carnivores are favored. Expand
PHYLOGENETIC AND MECHANISTIC ANALYSIS OF A DEVELOPMENTALLY INTEGRATED CHARACTER COMPLEX : ALTERNATE LIFE HISTORY MODES IN AMBYSTOMATID SALAMANDERS
TLDR
An overview of the genetic strategies that are used toward the reductionistic approach to character evolution, and some of the own published and unpublished results, are presented. Expand
Hormonal correlates of environmentally induced metamorphosis in the Western spadefoot toad, Scaphiopus hammondii.
  • R. Denver
  • Biology, Medicine
  • General and comparative endocrinology
  • 1998
TLDR
The metamorphic response to pond drying is likely driven by the activation of the thyroid and interrenal axes, the hormones of which control metamorphosis, and is rapid, occurring within 48 h after exposure to the desiccating environment. Expand
CHARACTER DISPLACEMENT IN POLYPHENIC TADPOLES
  • D. Pfennig, P. Murphy
  • Biology, Medicine
  • Evolution; international journal of organic evolution
  • 2000
TLDR
It is demonstrated that selection to minimize competition for food can cause character displacement, and it is suggested that both character displacement and phenotypic plasticity may mediate competitive interactions between species. Expand
Proximate and functional causes of polyphenism in an anuran tadpole
TLDR
This work examined the developmental and physiological bases underlying polyphenism in southern spadefoot toad tadpoles (Scaphiopus multiplicatus) and found that tadpole can change to the alternative morphology if their diet was switched. Expand
Evolutionary Patterns of Diversity in Spadefoot Toad Metamorphosis (Anura: Pelobatidae)
TLDR
Mapping larval data onto a molecular phylogeny indicated that short larval periods, as well as rapid embryonic development and high temperature tolerance, originated within the spadefoot toad family. Expand
Effects of Growth History and Exogenous Thyroxine on Size and Age at Metamorphosis in the Toad Bufo americanus
TLDR
It is suggested that the growth rate/differentiation antagonism is decoupled or overridden during later stages of larval development, which implies limits to metamorphic plasticity and is consistent with a fixed-rate model of amphibian metamorphosis. Expand
THE ROLE OF LARVAL DIET IN ANURAN METAMORPHOSIS
TLDR
Direct examination of thyroid hormone production in tadpoles consuming different diets may reveal a proximate mechanism linking diet quality to size at and time to metamorphosis. Expand
Evolution of Facultative Paedomorphosis in Salamanders
TLDR
Current data on facultative paedomorphosis support the premise that selection can favor the production of an environmentally induced polymorphism through more than one mechanism. Expand
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