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Functional feminization of the Mexican snook (Centropomus poeyi) using 17β-estradiol in the diet

dc.contributorAquaFish Innovation Lab, Juarez Autonomous University of Tabasco and CONACyTen-US
dc.creatorVidal-López, Juan Manuel
dc.creatorContreras-Sánchez, Wilfrido M.
dc.creatorHernández-Franyutti, Arlette
dc.creatorContreras-García, María de Jesús
dc.creatorUribe-Aranzábal, María del Carmen
dc.date2019-05-02
dc.date.accessioned2020-11-05T13:36:32Z
dc.date.available2020-11-05T13:36:32Z
dc.identifierhttp://lajar.ucv.cl/index.php/rlajar/article/view/vol47-issue2-fulltext-4
dc.identifier10.3856/vol47-issue2-fulltext-4
dc.identifier.urihttps://revistaschilenas.uchile.cl/handle/2250/159143
dc.descriptionThe Mexican snook, Centropomus poeyi, supports an important fishery in southeastern Mexico. Due to its protandrous hermaphroditism, females may be especially sensitive to overfishing because they tend to be larger and selective removal has the potential to negatively affect natural populations, thus making urgent the need to contribute on management strategies for the species. The objective of this study was to produce batches of reproductive females at an early age and a small size by using 17β-estradiol (E2) in the diet. In two separate experiments, we fed fish 0, 10, 20, 30, 40, 50, or 60 mg of 17β-estradiol per kg of food for 60 days during gonadal differentiation. Fish fed with 50 and 60 mg of E2 per kg of food resulted in 100% feminization, while the control group (0 mg of E2) was 100% male. Three years after feminization, sex-reversed fish remained female, producing oocytes and were capable of spawning, while fish in the control group were ripe males with running milt. E2-treated groups were significantly larger (weight and length) than the control groups for up to six months after treatment, but the difference was undetectable at 300 days post-treatment. Survival was high in all treatments (100%). We obtained high percentages of functional females using dosages of 50 and 60 mg kg-1 of E2 for 60 days, with 80% of the induced fish spawning and producing fertilized eggs and larvae. The results obtained in this study provide opportunities for broodstock management and sex manipulation.en-US
dc.formatapplication/pdf
dc.languageeng
dc.publisherPontificia Universidad Católica de Valparaísoen-US
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/view/vol47-issue2-fulltext-4/1046
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/downloadSuppFile/vol47-issue2-fulltext-4/1418
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dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/downloadSuppFile/vol47-issue2-fulltext-4/1425
dc.rightsCopyright (c) 2019 Latin American Journal of Aquatic Researchen-US
dc.sourceLatin American Journal of Aquatic Research; Vol 47, No 2 (2019); 240-250en-US
dc.sourcePlataforma para envío de artículos - Latin American Journal of Aquatic Research; Vol 47, No 2 (2019); 240-250es-ES
dc.source0718-560X
dc.source0718-560X
dc.subjectCentropomus poeyi; sex-inversion; functional females; snook culture; aquacultureen-US
dc.titleFunctional feminization of the Mexican snook (Centropomus poeyi) using 17β-estradiol in the dieten-US
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typeen-US
dc.typees-ES


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