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The relative effects of pace of life-history and habitat characteristics on the evolution of sexual ornaments: A comparative assessment

Sowersby, Will and Eckerstrom-Liedholm, Simon and Rowinski, Piotr K. and Balogh, Julia and Eiler, Stefan and Upstone, Joseph D. and Gonzalez-Voyer, Alejandro and Rogell, Björn (2022). The relative effects of pace of life-history and habitat characteristics on the evolution of sexual ornaments: A comparative assessment. Evolution. 76 , 114-127
[Research article]

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Abstract

Selection may favor greater investment into sexual ornaments when opportunities for future reproduction are limited, for example, under high adult mortality. However, predation, a key driver of mortality, typically selects against elaborate sexual ornaments. Here, we examine the evolution of sexual ornaments in killifishes, which have marked contrasts in life-history strategy among species and inhabit environments that differ in accessibility to aquatic predators. We first assessed if the size of sexual ornaments (unpaired fins) influenced swimming performance. Second, we investigated whether the evolution of larger ornamental fins is driven primarily by the pace of life-history (investment into current vs. future reproduction) or habitat type (a proxy for predation risk). We found that larger fins negatively affected swimming performance. Further, males from species inhabiting ephemeral habitats, with lower predation risk, had larger fins and greater sexual dimorphism in fin size, compared to males from more accessible permanent habitats. We show that enlarged ornamental fins, which impair locomotion, evolve more frequently in environments that are less accessible to predators, without clear associations to life-history strategy. Our results provide a rare link between the evolution of sexual ornaments, effects on locomotion performance, and natural selection on ornament size potentially through habitat differences in predation risk.

Authors/Creators:Sowersby, Will and Eckerstrom-Liedholm, Simon and Rowinski, Piotr K. and Balogh, Julia and Eiler, Stefan and Upstone, Joseph D. and Gonzalez-Voyer, Alejandro and Rogell, Björn
Title:The relative effects of pace of life-history and habitat characteristics on the evolution of sexual ornaments: A comparative assessment
Series Name/Journal:Evolution
Year of publishing :2022
Volume:76
Page range:114-127
Number of Pages:14
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 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
Keywords:Fins, killifish, life-history theory, secondary sexual traits, sexual selection
URN:NBN:urn:nbn:se:slu:epsilon-p-113965
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113965
Additional ID:
Type of IDID
DOI10.1111/evo.14358
Web of Science (WoS)000703005000001
ID Code:26806
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:24 Jan 2022 05:25
Metadata Last Modified:24 Jan 2022 06:01

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