Why high-condition males might be bad news for females and populations

Svensson, Erik I.

doi:10.1073/pnas.2301989120

Cited by 1 publication

(3 citation statements)

References 19 publications

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“…In turn, organisms actively interact with their surroundings, selecting and modifying their environment, which adjusts their probability of survival and reproduction (Laland et al 1999;Trappes et al 2022). This makes an organism both subject and object of its own evolution (Levins and Lewontin 1985;Svensson 2018;Erik I Svensson 2023). Such bi-directional cause-and-effect dynamics extend beyond the organism and its abiotic environment, and include interactions between the sexes of the same specieswhere one sex selects for certain phenotypes of the other sex and vice versa (Svensson 2018;Svensson 2019;Erik I Svensson 2023; Erik I.…”

Section: Introductionmentioning

confidence: 99%

“…This makes an organism both subject and object of its own evolution (Levins and Lewontin 1985;Svensson 2018;Erik I Svensson 2023). Such bi-directional cause-and-effect dynamics extend beyond the organism and its abiotic environment, and include interactions between the sexes of the same specieswhere one sex selects for certain phenotypes of the other sex and vice versa (Svensson 2018;Svensson 2019;Erik I Svensson 2023; Erik I. Svensson 2023).…”

Section: Introductionmentioning

confidence: 99%

“…The emergence of sexual reproduction fostered the formation of male and female gametes in most metazoans, resulting in a division of sexes (Bachtrog et al 2014;Furman et al 2020). The allocation of energy into gamete production, parental care, mate choice, sex roles and sexual dimorphism all contribute to differences in natural and sexual selection between the sexes (Parsch and Ellegren 2013;Bachtrog et al 2014;Mank 2017;Rowe et al 2018;Svensson 2019;Furman et al 2020;Erik I. Svensson 2023). This variation in selection can lead to opposing male and female fitness strategies, where the optimal strategy for one sex negatively impacts the other, resulting in sexual antagonism (SA) (Rice and Holland 1997;Lucotte et al 2016;Svensson 2018;Iversen et al 2019;Svensson 2019;Tosto et al 2023).…”

Section: Introductionmentioning

confidence: 99%

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Sexual antagonism and sex determination in three syngnathid species alongside a male pregnancy gradient

Dubin,

Parker,

Böhne

et al. 2023

Preprint

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Teleost fish show an enormous diversity of sex determination systems, varying from environmental sex determination to full sex chromosomes. Traditionally sex chromosomes are considered within a framework of sexually antagonistic relationships and are viewed not only as sex determination systems but also as a means to resolve sexual conflict by confining conflicting genes to one sex. However, the relationship between emergence sexually-antagonistic loci, resolution of sexual conflict and sex determination is not fully understood. In this study we take a look at genomic and transcriptomic signatures of sexual antagonism, and relate them to putative sex determination systems in three species from the family Syngnathidae: Nerophis ophidion, Syngnathus typhle and Hippocampus erectus. The family is famous for their extreme form of parental care - male pregnancy. Male pregnancy forms a parental investment gradient among species of the family. We selected species alongside this gradient to investigate the effects male pregnancy has on sexual conflict in syngnathids. We found that both S.typhle and N.ophidion seem to have environmental sex determination and that sexual conflict is primarily resolved via differential gene and allele expression. On the other hand H.erectus possess an XY sex chromosome system. Strikingly, the identified homomorphic Y chromosome is not homologous to the Y chromosome of H.erectus identified in an independent study. We hypothesize that both sex-linked chromosomes evolved due to captive breeding and represent transition states between sex determination systems. Furthermore, we propose that the master sex determination gene is located outside of these sex-linked chromosomes.

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