title: Phenotypic plasticity is not affected by experimental evolution in constant, predictable or unpredictable fluctuating thermal environments.
abstract: The selective past of populations is presumed to affect the levels of phenotypic plasticity. Experimental evolution at constant temperatures is generally expected to lead to a decreased level of plasticity due to presumed costs associated with phenotypic plasticity when not needed. In this study, we investigated the effect of experimental evolution in constant, predictable and unpredictable daily fluctuating temperature regimes on the levels of phenotype plasticity in several life history and stress resistance traits in Drosophila simulans. Contrary to the expectation, evolution in the different regimes did not affect the levels of plasticity in any of the traits investigated even though the populations from the different thermal regimes had evolved different stress resistance and fitness trait means. Although costs associated with phenotypic plasticity are known, our results suggest that the maintenance of phenotypic plasticity might come at low and negligible costs, and thus, the potential of phenotypic plasticity to evolve in populations exposed to different environmental conditions might be limited.
authors: Department of Bioscience, Section for Genetics, Ecology and Evolution, Aarhus University, Aarhus C, Denmark.
authors: T
authors: T
authors: Manenti
authors: Department of Bioscience, Section for Genetics, Ecology and Evolution, Aarhus University, Aarhus C, Denmark.
authors: V
authors: V
authors: Loeschcke
authors: Department of Bioscience, Section for Genetics, Ecology and Evolution, Aarhus University, Aarhus C, Denmark.
authors: N N
authors: NN
authors: Moghadam
authors: Department of Bioscience, Section for Genetics, Ecology and Evolution, Aarhus University, Aarhus C, Denmark.
authors: J G
authors: JG
authors: Sørensen
mesh_terms: D000222:Adaptation, Physiological / Q000235:genetics*; D000818:Animals; D005075:Biological Evolution; D000067636:Drosophila simulans / Q000235:genetics* / Q000502:physiology*; D017753:Ecosystem; D005260:Female; D014644:Genetic Variation; D008297:Male; D012641:Selection, Genetic; D013696:Temperature
keywords: Drosophila simulans; adaptability; costs of plasticity; laboratory natural selection; stress resistance; varying environments