Evolution of a predator-induced, nonlinear reaction norm

Mauricio J. Carter, Martin I. Lind, Stuart R. Dennis, William Hentley, Andrew P. Beckerman

Resultado de la investigación: Article

3 Citas (Scopus)

Resumen

Inducible, anti-predator traits are a classic example of phenotypic plasticity. Their evolutionary dynamics depend on their genetic basis, the historical pattern of predation risk that populations have experienced and current selection gradients. When populations experience predators with contrasting hunting strategies and size preferences, theory suggests contrasting micro-evolutionary responses to selection. Daphnia pulex is an ideal species to explore the microevolutionary response of anti-predator traits because they face heterogeneous predation regimes, sometimes experiencing only invertebrate midge predators and other times experiencing vertebrate fish and invertebrate midge predators. We explored plausible patterns of adaptive evolution of a predator-induced morphological reaction norm. We combined estimates of selection gradients that characterize the various habitats that D. pulex experiences with detail on the quantitative genetic architecture of inducible morphological defences. Our data reveal a fine scale description of daphnid defensive reaction norms, and a strong covariance between the sensitivity to cues and the maximum response to cues. By analysing the response of the reaction norm to plausible, predator-specific selection gradients,we showhowin the context of this covariance, micro-evolution may be more uniform than predicted from size-selective predation theory. Our results show how covariance between the sensitivity to cues and the maximum response to cues for morphological defence can shape the evolutionary trajectory of predator-induced defences in D. pulex.

Idioma originalEnglish
Número de artículo20170859
PublicaciónProceedings of the Royal Society B: Biological Sciences
Volumen284
N.º1861
DOI
EstadoPublished - 30 ago 2017

Huella dactilar

reaction norm
Cues
predator
predators
Invertebrates
Daphnia pulex
Fish
Plasticity
Trajectories
Daphnia
midges
predation
Population
Ecosystem
Vertebrates
Fishes
invertebrate
invertebrates
quantitative genetics
phenotypic plasticity

ASJC Scopus subject areas

  • Medicine(all)
  • Immunology and Microbiology(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Environmental Science(all)
  • Agricultural and Biological Sciences(all)

Citar esto

Carter, Mauricio J. ; Lind, Martin I. ; Dennis, Stuart R. ; Hentley, William ; Beckerman, Andrew P. / Evolution of a predator-induced, nonlinear reaction norm. En: Proceedings of the Royal Society B: Biological Sciences. 2017 ; Vol. 284, N.º 1861.
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Evolution of a predator-induced, nonlinear reaction norm. / Carter, Mauricio J.; Lind, Martin I.; Dennis, Stuart R.; Hentley, William; Beckerman, Andrew P.

En: Proceedings of the Royal Society B: Biological Sciences, Vol. 284, N.º 1861, 20170859, 30.08.2017.

Resultado de la investigación: Article

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