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

ABSTRACT The 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 populati...

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Autores principales:	Vidal-López,Juan Manuel, Contreras-Sánchez,Wilfrido M., Hernández-Franyutti,Arlette, Contreras-García,María de Jesús, Uribe-Aranzábal,María del Carmen
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2019
Materias:	Centropomus poeyi sex-inversion functional females snook culture aquaculture
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2019000200240
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spelling	oai:scielo:S0718-560X20190002002402019-06-04Functional feminization of the Mexican snook (Centropomus poeyi) using 17β-estradiol in the dietVidal-López,Juan ManuelContreras-Sánchez,Wilfrido M.Hernández-Franyutti,ArletteContreras-García,María de JesúsUribe-Aranzábal,María del Carmen Centropomus poeyi sex-inversion functional females snook culture aquaculture ABSTRACT The 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.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.47 n.2 20192019-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2019000200240en10.3856/vol47-issue2-fulltext-4
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Centropomus poeyi sex-inversion functional females snook culture aquaculture
spellingShingle	Centropomus poeyi sex-inversion functional females snook culture aquaculture Vidal-López,Juan Manuel Contreras-Sánchez,Wilfrido M. Hernández-Franyutti,Arlette Contreras-García,María de Jesús Uribe-Aranzábal,María del Carmen Functional feminization of the Mexican snook (Centropomus poeyi) using 17β-estradiol in the diet
description	ABSTRACT The 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.
author	Vidal-López,Juan Manuel Contreras-Sánchez,Wilfrido M. Hernández-Franyutti,Arlette Contreras-García,María de Jesús Uribe-Aranzábal,María del Carmen
author_facet	Vidal-López,Juan Manuel Contreras-Sánchez,Wilfrido M. Hernández-Franyutti,Arlette Contreras-García,María de Jesús Uribe-Aranzábal,María del Carmen
author_sort	Vidal-López,Juan Manuel
title	Functional feminization of the Mexican snook (Centropomus poeyi) using 17β-estradiol in the diet
title_short	Functional feminization of the Mexican snook (Centropomus poeyi) using 17β-estradiol in the diet
title_full	Functional feminization of the Mexican snook (Centropomus poeyi) using 17β-estradiol in the diet
title_fullStr	Functional feminization of the Mexican snook (Centropomus poeyi) using 17β-estradiol in the diet
title_full_unstemmed	Functional feminization of the Mexican snook (Centropomus poeyi) using 17β-estradiol in the diet
title_sort	functional feminization of the mexican snook (centropomus poeyi) using 17β-estradiol in the diet
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2019000200240
work_keys_str_mv	AT vidallopezjuanmanuel functionalfeminizationofthemexicansnookcentropomuspoeyiusing17946estradiolinthediet AT contrerassanchezwilfridom functionalfeminizationofthemexicansnookcentropomuspoeyiusing17946estradiolinthediet AT hernandezfranyuttiarlette functionalfeminizationofthemexicansnookcentropomuspoeyiusing17946estradiolinthediet AT contrerasgarciamariadejesus functionalfeminizationofthemexicansnookcentropomuspoeyiusing17946estradiolinthediet AT uribearanzabalmariadelcarmen functionalfeminizationofthemexicansnookcentropomuspoeyiusing17946estradiolinthediet
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Functional feminization of the Mexican snook (Centropomus poeyi) using 17&#946;-estradiol in the diet

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