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Fast life-histories are associated with larger brain size in killifishes

Sowersby, Will and Eckerstrom-Liedholm, Simon and Kotrschal, Alexander and Näslund, Joacim and Rowinski, Piotr and Gonzalez-Voyer, Alejandro and Rogell, Björn (2021). Fast life-histories are associated with larger brain size in killifishes. Evolution. 75 , 2286-2298
[Research article]

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Abstract

The high energetic demands associated with the vertebrate brain are proposed to result in a trade-off between the pace of life-history and relative brain size. However, because both life-history and brain size also have a strong relationship with body size, any associations between the pace of life-history and relative brain size may be confounded by coevolution with body size. Studies on systems where contrasts in the pace of life-history occur without concordant contrasts in body size could therefore add to our understanding of the potential coevolution between relative brain size and life-history. Using one such system - 21 species of killifish - we employed a common garden design across two ontogenetic stages to investigate the association between relative brain size and the pace of life-history. Contrary to predictions, we found that relative brain size was larger in adult fast-living killifishes, compared to slow-living species. Although we found no differences in relative brain size between juvenile killifishes. Our results suggest that fast- and slow-living killifishes do not exhibit the predicted trade-off between brain size and life-history. Instead, fast and slow-living killifishes could differ in the ontogenetic timing of somatic versus neural growth or inhabit environments that differ considerably in cognitive demands.

Authors/Creators:Sowersby, Will and Eckerstrom-Liedholm, Simon and Kotrschal, Alexander and Näslund, Joacim and Rowinski, Piotr and Gonzalez-Voyer, Alejandro and Rogell, Björn
Title:Fast life-histories are associated with larger brain size in killifishes
Series Name/Journal:Evolution
Year of publishing :2021
Volume:75
Page range:2286-2298
Number of Pages:13
Publisher:WILEY
ISSN:0014-3820
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 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) > Ecology
Keywords:life-history, brain size, killifish, coevolution, body size, trade-off
URN:NBN:urn:nbn:se:slu:epsilon-p-113272
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113272
Additional ID:
Type of IDID
DOI10.1111/evo.14310
Web of Science (WoS)000681244400001
ID Code:25634
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:11 Oct 2021 14:25
Metadata Last Modified:11 Oct 2021 14:31

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