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Ecological and evolutionary consequences of alternative sex-change pathways in fish

Benvenuto, C, Coscia, I, Chopelet, J, Sala-Bozano, M and Mariani, S (2017) Ecological and evolutionary consequences of alternative sex-change pathways in fish. Scientific Reports, 7. ISSN 2045-2322

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Open Access URL: https://www.nature.com/articles/s41598-017-09298-8 (Published version)

Abstract

Sequentially hermaphroditic fish change sex from male to female (protandry) or vice versa (protogyny), increasing their fitness by becoming highly fecund females or large dominant males, respectively. These life-history strategies present different social organizations and reproductive modes, from near-random mating in protandry, to aggregate- and harem-spawning in protogyny. Using a combination of theoretical and molecular approaches, we compared variance in reproductive success (V k*) and effective population sizes (N e) in several species of sex-changing fish. We observed that, regardless of the direction of sex change, individuals conform to the same overall strategy, producing more offspring and exhibiting greater V k* in the second sex. However, protogynous species show greater V k*, especially pronounced in haremic species, resulting in an overall reduction of N e compared to protandrous species. Collectively and independently, our results demonstrate that the direction of sex change is a pivotal variable in predicting demographic changes and resilience in sex-changing fish, many of which sustain highly valued and vulnerable fisheries worldwide.

Item Type: Article
Uncontrolled Keywords: 0601 Biochemistry and Cell Biology, 0299 Other Physical Sciences
Subjects: Q Science > QH Natural history > QH301 Biology
Q Science > QH Natural history > QH426 Genetics
Q Science > QL Zoology
Divisions: Biological & Environmental Sciences (new Sep 19)
Publisher: Nature Publishing Group
Related URLs:
Date Deposited: 06 Mar 2020 10:40
Last Modified: 06 Mar 2020 10:45
DOI or Identification number: 10.1038/s41598-017-09298-8
URI: http://researchonline.ljmu.ac.uk/id/eprint/12414

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