The adaptive significance of an environmentally-cued developmental switch in an anuran tadpole

@article{Pfennig2004TheAS,
  title={The adaptive significance of an environmentally-cued developmental switch in an anuran tadpole},
  author={David W. Pfennig},
  journal={Oecologia},
  year={2004},
  volume={85},
  pages={101-107}
}
  • D. Pfennig
  • Published 2004
  • Biology, Medicine
  • Oecologia
SummaryThis study investigated the proximate basis of bimodally-distributed, environmentally-induced variation that occurs in natural populations of spade-foot toad tadpoles (Scaphiopus multiplicatus). Most individuals in most populations occur as a small, slowly-developing omnivore morph. In some of these same populations, a varying number of individuals occur as a large, rapidly-developing carnivore morph (Pfennig 1989). Censuses of 37 different natural ponds revealed that the frequency of… Expand
Growth and foraging consequences of facultative paedomorphosis in the tiger salamander,Ambystoma tigrinum nebulosum
TLDR
Students of a montane population of the tiger salamander studied the adult growth rate and body condition across three growing seasons to assess the relative costs and benefits of each morph, suggesting that paedomorphs should have decreased fitness relative to metamorphs. Expand
Adaptive value of a predatory mouth-form in a dimorphic nematode
TLDR
This study provides the first functional context for dimorphism in a model for the genetics of plasticity and shows that the complex Eu form confers a greater ability to kill prey than the more rapidly developing St form. Expand
Developmental mechanisms of threshold evolution in a polyphenic beetle
TLDR
Larval larvae of populations that have evolved a larger threshold body size have to accumulate greater mass to become competent to express the horned morph, are less sensitive to the juvenile hormone (JH) analogue methoprene, and exhibit a delay in the sensitive period for meethoprene relative to other developmental events. Expand
Reassessment of the environmental model of developmental polyphenism in spadefoot toad tadpoles
TLDR
The results indicate that carnivore induction can occur through different cues and that the current model for carnivore development is too limited, and argue that the carnivore/omnivore spadefoot system is neither a polyphenism nor a polymorphism but is a continuously distributed plasticity. Expand
Evolutionary and developmental considerations of the diet and gut morphology in ceratophryid tadpoles (Anura)
TLDR
The larval development of the gastrointestinal tract of Lepidobatrachus is unique compared with that of other free-living anuran larvae, and patterns seem to be influenced by food quantity/quality, and most predominant by animal protein. Expand
A TADPOLE‐INDUCED POLYPHENISM IN THE SALAMANDER HYNOBIUS RETARDATUS
TLDR
The results do not support the hypotheses that the broad‐headed morph evolved for consuming conspecifics because of their better balance of nutrients or for excluding strong competitors for food or space, and it is tentatively concluded that the morph evolved to eat large, tough prey, including both conspecies and heterospecific tadpoles. Expand
Morphological variation in a larval salamander: dietary induction of plasticity in head shape
TLDR
The results illustrate that ingestion of different types of prey contributes to plasticity in head shape, but that some other proximate cue(s), either alone or in combination with diet variation, is essential to induce the extremes of trophic polymorphism in this species. Expand
Dead Spadefoot Tadpoles Adaptively Modify Development in Future Generations: A Novel Form of Nongenetic Inheritance?
TLDR
A possible novel form of nongenetic inheritance in the tadpoles of the Mexican Spadefoot is described: the transmission of information about the environment from dead individuals to living individuals of a later cohort or generation to mediate adaptive evolution when populations experience different environmental conditions. Expand
Threshold evolution in exotic populations of a polyphenic beetle
TLDR
The phenotypic divergence observed between field populations was maintained in laboratory populations after two generations under identical environmental conditions, suggesting a genetic basis to allometric divergence in these populations. Expand
Antipredator behavior promotes diversification of feeding strategies.
TLDR
It is hypothesized that the recurrent expression of such behaviors in sympatric populations of Sc. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 44 REFERENCES
COMPETITION, COMPARATIVE LIFE HISTORIES, AND MAINTENANCE OF SHELL DIMORPHISM IN A BARNACLE'
TLDR
If bents are less fit than conics in the absence of predation by Acanthina, a necessary condition for the predator- induced developmental switch to bents to be resistant to invasion and replacement by the unconditional strategy "always grow bent over", is determined. Expand
Effects of density and predation on Scaphiopus couchi tadpoles in desert ponds
SummaryThe effects of density on growth and development of Scaphiopus couchi tadpoles in desert ponds were investigated, and sources of mortality over a three-year period were documented. In 16 ofExpand
Predator induction of crests in morphs of the Daphnia carinata King complex
TLDR
Temperature, turbulence, oxygen, and notonectid predators were studied experimentally as possible factors influencing crest growth in six different forms of the Daphnia carinata complex, indicating that predation was a potent factor influencing crest development, and the distribution and abundance of morphs. Expand
Predator-Induced Life-History Shifts in a Freshwater Snail
TLDR
The snail Physella virgata virGata, a widely distributed freshwater pulmonate, was observed to change its life-history characteristics in the presence of the crayfish Orconectes virilis in spring-fed Oklahoma streams, indicating that the life histories of these snails are phenotypically plastic. Expand
ADAPTIVE PLASTICITY IN DEVELOPMENT OF SCAPHIOPUS COUCHII TADPOLES IN DESERT PONDS
  • R. Newman
  • Biology, Medicine
  • Evolution; international journal of organic evolution
  • 1988
TLDR
Although only one of the five sibships responded differently, there appears to be genetic variation for plasticity in growth, and a genetically determined trade‐off between fitness in short‐duration ponds (via rapid development) and fitness in long duration ponds ( via large size at metamorphosis). Expand
Effect of Food and Density on Development of Typical and Cannibalistic Salamander Larvae in Ambystoma tigrinum nebulosum
TLDR
The results suggest the typical and cannibalistic larvae which occur in some populations of Ambystoma tigrinum nebulosum is an environmentally induced developmental polymorphism that results from some individuals responding to the environment differently than others. Expand
PHENOTYPIC PLASTICITY AND HETEROCHRONY IN CICHLASOMA MANAGUENSE (PISCES, CICHLIDAE) AND THEIR IMPLICATIONS FOR SPECIATION IN CICHLID FISHES
  • A. Meyer
  • Biology, Medicine
  • Evolution; international journal of organic evolution
  • 1987
TLDR
The influence of diet on trophic morphology during ontogeny in Cichlasoma managuense was examined and two groups of full siblings were fed two different diets for eight months after the onset of feeding; thereafter both groups were fed a common diet. Expand
Canalization Versus Developmental Conversion in a Spatially Variable Environment
TLDR
The results demonstrate that environmental control of development requires a cost to the stress-tolerant morphology, and suggest that a mixture of genetic and environmental control is an evolutionarily stable state under some conditions. Expand
Paedomorphosis in Ambystoma Talpoideum: Effects of Density, Food, and Pond Drying
TLDR
Differences in en- vironmental factors among populations can affect the life-history pathways of individuals and lead to a predominance of paedomorphosis in permanent aquatic habitats with fa- vorable growth environments. Expand
Dimorphism in Larval Mouthparts in Spadefoot Toads of the Scaphiopus hammondi Group
TLDR
The background of the problem of Buccal dimorphism in larvae of western spadefoots is reviewed and some of the lines of investigation that may help to provide a satisfactory solution are discussed. Expand
...
1
2
3
4
5
...