Variation in personality shaped by evolutionary history, genotype and developmental plasticity in response to feeding modalities in the Arctic charr
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The Royal Society
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Animal personality has been shown to be influenced by both genetic and environmental factors and shaped by natural selection. Currently, little is known about mechanisms influencing the development of personality traits. This study examines the extent to which personality development is genetically influenced and/or environmentally responsive (plastic). We also investigated the role of evolutionary history, assessing whether personality traits could be canalized along a genetic and ecological divergence gradient. We tested the plastic potential of boldness in juveniles of five Icelandic Arctic charr morphs (Salvelinus alpinus), including two pairs of sympatric morphs, displaying various degrees of genetic and ecological divergence from the ancestral anadromous charr, split between treatments mimicking benthic versus pelagic feeding modalities. We show that differences in mean boldness are mostly affected by genetics. While the benthic treatment led to bolder individuals overall, the environmental effect was rather weak, suggesting that boldness lies under strong genetic influence with reduced plastic potential. Finally, we found hints of differences by morphs in boldness canalization through reduced variance and plasticity, and higher consistency in boldness within morphs. These findings provide new insights on how behavioural development may impact adaptive diversification.
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General Agricultural and Biological Sciences, General Environmental Science, General Immunology and Microbiology, General Biochemistry, Genetics and Molecular Biology, General Medicine, Landbúnaðarrannsóknir, Líffræði, Umhverfisfræði, Bleikja
Citation
Dellinger Marion, Steele Sarah E., Sprockel Evert, Philip Joris, Pálsson Arnar and Benhaïm David 2023Variation in personality shaped by evolutionary history, genotype and developmental plasticity in response to feeding modalities in the Arctic charrProc. R. Soc. B.29020232302
Dellinger M, Steele SE,Sprockel E, Philip J, Pálsson A, Benhaïm D.2023 Variation in personality shaped byevolutionary history, genotype anddevelopmental plasticity in response to feedingmodalities in the Arctic charr. Proc. R. Soc. B290: 20232302.https://doi.org/10.1098/rspb.2023.2302
Dellinger M, Steele SE,Sprockel E, Philip J, Pálsson A, Benhaïm D.2023 Variation in personality shaped byevolutionary history, genotype anddevelopmental plasticity in response to feedingmodalities in the Arctic charr. Proc. R. Soc. B290: 20232302.https://doi.org/10.1098/rspb.2023.2302