The Consequences of Feminization in Breeding Groups of Wild Fish.
BACKGROUND: The feminization of nature by endocrine-disrupting chemicals (EDCs) is a key environmental issue affecting both terrestrial and aquatic wildlife. A crucial and as yet unanswered question is whether EDCs have adverse impacts on the sustainability of wildlife populations. There is widespre...
| Publicado en: | Environmental Health Perspectives Vol. 119; no. 3; pp. 306 - 312 |
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| Autores principales: | , , , , , , , , , |
| Formato: | equations & formulas pictorial research tables/charts Journal Article |
| Publicado: |
National Institute of Environmental Health Sciences
Mar2011
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104709545&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104709545 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00916765 3B5 jtl: Environmental Health Perspectives issn: 00916765 maglogo: N pubinfo: dt: Mar2011 vid: 119 iid: 3 pid: 56539 pub: National Institute of Environmental Health Sciences place: Research Triangle Park, North Carolina artinfo: ui: 104709545 60696631 10.1289/ehp.1002555 NLM21362587 PMC3059991 104709545 ppf: 306 ppct: 6 formats: fmt: @attributes: type: P tig: atl: The Consequences of Feminization in Breeding Groups of Wild Fish. aug: au: Harris, Catherine A. Hamilton, Patrick B. Runnalls, Tamsin J. Vinciotti, Veronica Henshaw, Alan Hodgson, Dave Coe, Tobias S. Jobling, Susan Tyler, Charles R. Sumpter, John P. affil: Institute for the Environment, Brunel University, Uxbridge, United Kingdom sug: subj: Feminization Fish Environmental Pollutants Adverse Effects Reproduction Animal Studies DNA United Kingdom Prospective Studies Experimental Studies Genotype Male Female Male Female ab: BACKGROUND: The feminization of nature by endocrine-disrupting chemicals (EDCs) is a key environmental issue affecting both terrestrial and aquatic wildlife. A crucial and as yet unanswered question is whether EDCs have adverse impacts on the sustainability of wildlife populations. There is widespread concern that intersex fish are reproductively compromised, with potential population-level consequences. However, to date, only in vitro sperm quality data are available in support of this hypothesis. OBJECTIVE: The aim of this study was to examine whether wild endocrine-disrupted fish can compete successfully in a realistic breeding scenario. METHODS: In two competitive breeding experiments using wild roach (Rutilus rutilus), we used DNA microsatellites to assign parentage and thus determine reproductive success of the adults. RESULTS: In both studies, the majority of intersex fish were able to breed, albeit with varying degrees of success. In the first study, where most intersex fish were only mildly feminized, body length was the only factor correlated with reproductive success. In the second study, which included a higher number of more severely intersex fish, reproductive performance was negatively correlated with severity of intersex. The intersex condition reduced reproductive performance by up to 76% for the most feminized individuals in this study, demonstrating a significant adverse effect of intersex on reproductive performance. CONCLUSION: Feminization of male fish is likely to be an important determinant of reproductive performance in rivers where there is a high prevalence of moderately to severely feminized males. pubtype: Academic Journal doctype: equations & formulas pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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