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Rapid mosaic brain evolution under artificial selection for relative telencephalon size in the guppy (Poecilia reticulata)

Fong, Stephanie and Rogell, Björn and Amcoff, Mirjam and Kotrschal, Alexander and van der Bijl, Wouter and Buechel, Severine D. and Kolm, Niclas (2021). Rapid mosaic brain evolution under artificial selection for relative telencephalon size in the guppy (Poecilia reticulata). Science Advances. 7 , eabj4314
[Research article]

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Abstract

The mosaic brain evolution hypothesis, stating that brain regions can evolve relatively independently during cognitive evolution, is an important idea to understand how brains evolve with potential implications even for human brain evolution. Here, we provide the first experimental evidence for this hypothesis through an artificial selection experiment in the guppy (Poecilia reticulata). 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.

Authors/Creators:Fong, Stephanie and Rogell, Björn and Amcoff, Mirjam and Kotrschal, Alexander and van der Bijl, Wouter and Buechel, Severine D. and Kolm, Niclas
Title:Rapid mosaic brain evolution under artificial selection for relative telencephalon size in the guppy (Poecilia reticulata)
Series Name/Journal:Science Advances
Year of publishing :2021
Volume:7
Article number:eabj4314
Number of Pages:10
Publisher:AMER ASSOC ADVANCEMENT SCIENCE
ISSN:2375-2548
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Evolutionary Biology
URN:NBN:urn:nbn:se:slu:epsilon-p-114469
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-114469
Additional ID:
Type of IDID
DOI10.1126/sciadv.abj4314
Web of Science (WoS)000717666900009
ID Code:26227
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:29 Nov 2021 10:25
Metadata Last Modified:29 Nov 2021 10:31

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