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Sex ratios deviate across killifish species without clear links to life history

Sowersby, Will and Gonzalez-Voyer, Alejandro and Rogell, Björn (2020). Sex ratios deviate across killifish species without clear links to life history. Evolutionary Ecology. 34 , 411-426
[Research article]

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Sex ratios can differ from an expected equal proportion of males and females, carrying substantial implications for our understanding of how mating systems evolve. Typically, macro-evolutionary studies have been conducted without assessing how deviations from an equal sex ratio could be explained by sex-biased mortality or dispersal. Our understanding of sex ratio evolution independent of these confounds, in addition to any putative links between skewed sex ratios and other factors (e.g. life history), therefore remains largely unexplored. Here, we conducted an exploratory study investigating differences in sex ratios across closely related species while controlling for extrinsic mortality. We also tested two factors, non-overlapping/overlapping generations and the social environment, which have both been hypothesised to affect sex ratios. Specifically, we raised 15 species of killifish, which have either overlapping or discrete generations, under both solitary and social treatments. We found substantial divergences in sex ratios across closely related species, which exhibited both male and female biases. In conjunction with a low phylogenetic signal, our results suggest that sex ratios can evolve rapidly in this group. However, we found no evidence that overlapping generations or the social environment affected sex biases, suggesting that other factors drive the rapid evolution of sex ratios in killifishes.

Authors/Creators:Sowersby, Will and Gonzalez-Voyer, Alejandro and Rogell, Björn
Title:Sex ratios deviate across killifish species without clear links to life history
Series Name/Journal:Evolutionary Ecology
Year of publishing :2020
Page range:411-426
Number of Pages:16
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:Sex ratio, Sex determination, Killifish, Generation overlap, Life-history theory, Evolution
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Additional ID:
Type of IDID
Web of Science (WoS)000527909400001
ID Code:17254
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:18 Aug 2020 06:37
Metadata Last Modified:15 Jan 2021 19:46

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