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- W2167099731 abstract "Environmental sex reversal (ESR) occurs when environmental factors overpower genetic sex-determining factors. The phenomenon of ESR is observed widely in teleost species, where it can be induced by exposing developing fish to endocrine disrupting chemicals (EDCs). EDC-induced ESR has been exploited by the aquaculture industry, while ecological and evolutionary models are also beginning to elucidate the potential roles that sex-reversed individuals play in influencing population dynamics. However, how EDC exposure affects individual fitness remains relatively unknown. To date, many experimental studies have induced sex reversal in fish and measured fitness—as indicated by related traits such as size, survival and gonadal somatic index (GSI), but the reported results vary. Here, we meta-analytically combine the results of 78 studies of induced ESR to gain insight into the fitness of sex-reversed individuals. Overall, our results suggest that the fitness of fish exposed to EDCs is reduced at the time of exposure, with exposed individuals having a smaller size and likely a smaller GSI. Given a period of non-exposure, fish treated with EDCs can regain a size equal to those not exposed, although GSI remains compromised. Interestingly, survival does not appear to be affected by EDC treatment. The published reports that comprise our dataset are, however, based on captive fish and the general small size resulting from exposure is likely to lead to reduced survival in the wild. Additionally, reduced fitness-related parameters are likely to be due to exposure to EDCs rather than ESR itself. We suggest that theoretical models of ESR should account for the fitness-related effects that we report. Whilst we are able to shed light on the physical fitness of EDC-exposed fish, the behaviour of such individuals remains largely untested and should be the focus of future experimental manipulation." @default.
- W2167099731 created "2016-06-24" @default.
- W2167099731 creator A5030763843 @default.
- W2167099731 creator A5064087878 @default.
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- W2167099731 date "2012-04-27" @default.
- W2167099731 modified "2023-10-01" @default.
- W2167099731 title "The fitness consequences of environmental sex reversal in fish: a quantitative review" @default.
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- W2167099731 doi "https://doi.org/10.1111/j.1469-185x.2012.00230.x" @default.
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