Rapid mosaic brain evolution under artificial selection for relative telencephalon size in the guppy ( <i>Poecilia reticulata</i> )
Stephanie Fong, Björn Rogell, Mirjam Amcoff, Alexander Kotrschal, Wouter van der Bijl, Séverine D. Buechel, Niclas Kolm
Abstract
). After four generations of selection on relative telencephalon volume (relative to brain size), we found substantial changes in telencephalon size but no changes in other regions. Further comparisons revealed that up-selected lines had larger telencephalon, while down-selected lines had smaller telencephalon than wild Trinidadian populations. Our results support that independent evolutionary changes in specific brain regions through mosaic brain evolution can be important facilitators of cognitive evolution.
Topics & Concepts
PoeciliaGuppyCerebrumBrain sizeBiologyEvolutionary biologySelection (genetic algorithm)PoeciliidaeZoologyNeuroscienceFish <Actinopterygii>Computer scienceArtificial intelligenceCentral nervous systemMedicineRadiologyFisheryMagnetic resonance imagingAnimal Behavior and ReproductionPrimate Behavior and EcologyBat Biology and Ecology Studies