Evolutionary divergence of plasticity in brain morphology between ecologically divergent habitats of Trinidadian guppies.

Autor:	Axelrod CJ; Department of Ecology and Evolution, Cornell University, Ithaca, NY, United States.; Department of Biology, Washington University in St. Louis, St. Louis, MO, United States., Yang Y; Department of Biology, Washington University in St. Louis, St. Louis, MO, United States.; Department of Integrative Biology, University of South Florida, Tampa, FL, United States., Grant E; Department of Biology, Washington University in St. Louis, St. Louis, MO, United States., Fleming J; Department of Biology, Washington University in St. Louis, St. Louis, MO, United States., Stone I; Department of Biology, Washington University in St. Louis, St. Louis, MO, United States., Carlson BA; Department of Biology, Washington University in St. Louis, St. Louis, MO, United States., Gordon SP; Department of Ecology and Evolution, Cornell University, Ithaca, NY, United States.; Department of Biology, Washington University in St. Louis, St. Louis, MO, United States.
Jazyk:	angličtina
Zdroj:	Evolution; international journal of organic evolution [Evolution] 2024 Jul 01; Vol. 78 (7), pp. 1261-1274.
DOI:	10.1093/evolut/qpae055
Abstrakt:	Phenotypic plasticity is critical for organismal performance and can evolve in response to natural selection. Brain morphology is often developmentally plastic, affecting animal performance in a variety of contexts. However, the degree to which the plasticity of brain morphology evolves has rarely been explored. Here, we use Trinidadian guppies (Poecilia reticulata), which are known for their repeated adaptation to high-predation (HP) and low-predation (LP) environments, to examine the evolution and plasticity of brain morphology. We exposed second-generation offspring of individuals from HP and LP sites to 2 different treatments: predation cues and conspecific social environment. Results show that LP guppies had greater plasticity in brain morphology compared to their ancestral HP population, suggesting that plasticity can evolve in response to environmentally divergent habitats. We also show sexual dimorphism in the plasticity of brain morphology, highlighting the importance of considering sex-specific variation in adaptive diversification. Overall, these results may suggest the evolution of brain morphology plasticity as an important mechanism that allows for ecological diversification and adaptation to divergent habitats. (© The Author(s) 2024. Published by Oxford University Press on behalf of The Society for the Study of Evolution (SSE). All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.)
Databáze:	MEDLINE
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