Dr Chiara Benvenuto C.Benvenuto@salford.ac.uk
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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 (Vk*) and effective population sizes (Ne) 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 Vk* in the second sex. However, protogynous species show greater Vk*, especially pronounced in haremic species, resulting in an overall reduction of Ne 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.
Benvenuto, C., Coscia, I., Chopelet, J., Sala-Bozano, M., & Mariani, S. (2017). Ecological and evolutionary consequences of alternative sex-change pathways in fish. Scientific reports, 7(9804), https://doi.org/10.1038/s41598-017-09298-8
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 25, 2017 |
Online Publication Date | Aug 22, 2017 |
Publication Date | Aug 22, 2017 |
Deposit Date | Jul 25, 2017 |
Publicly Available Date | Aug 23, 2017 |
Journal | Scientific Reports |
Print ISSN | 2045-2322 |
Electronic ISSN | 2045-2322 |
Publisher | Nature Publishing Group |
Volume | 7 |
Issue | 9804 |
DOI | https://doi.org/10.1038/s41598-017-09298-8 |
Publisher URL | http://dx.doi.org/10.1038/s41598-017-09298-8 |
Related Public URLs | http://www.nature.com/srep/ |
s41598-017-09298-8.pdf
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