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Genomics of habitat choice and adaptive evolution in a deep-sea fish.

Gaither, Michelle R. and Gkafas, Georgios A. and de Jong, Menno and Sarigol, Fatih and Neat, Francis and Regnier, Thomas and Moore, Daniel and Grӧcke, Darren R. and Hall, Neil and Liu, Xuan and Kenny, John and Lucaci, Anita and Hughes, Margaret and Haldenby, Sam and Hoelzel, A. Rus (2018) 'Genomics of habitat choice and adaptive evolution in a deep-sea fish.', Nature ecology and evolution., 2 (4). pp. 680-687.

Abstract

Intraspecific diversity promotes evolutionary change, and when partitioned among geographic regions or habitats can form the basis for speciation. Marine species live in an environment that can provide as much scope for diversification in the vertical as in the horizontal dimension. Understanding the relevant mechanisms will contribute significantly to our understanding of eco-evolutionary processes and effective biodiversity conservation. Here, we provide an annotated genome assembly for the deep-sea fish Coryphaenoides rupestris and re-sequencing data to show that differentiation at non-synonymous sites in functional loci distinguishes individuals living at different depths, independent of horizontal spatial distance. Our data indicate disruptive selection at these loci; however, we find no clear evidence for differentiation at neutral loci that may indicate assortative mating. We propose that individuals with distinct genotypes at relevant loci segregate by depth as they mature (supported by survey data), which may be associated with ecotype differentiation linked to distinct phenotypic requirements at different depths.

Item Type:Article
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Full text:(VoR) Version of Record
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1038/s41559-018-0482-x
Publisher statement:Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Date accepted:22 January 2018
Date deposited:09 March 2018
Date of first online publication:05 March 2018
Date first made open access:09 March 2018

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