Feminization of juveniles of White Robalo <i> Centropomus undecimalis</ i> (Bloch 1792) using 17β-Estradiol

  • Juan Manuel Vidal-López Universidad Juárez Autónoma de Tabasco, Mexico
  • Carlos Alfonso Álvarez-González Universidad Juárez Autónoma de Tabasco, Mexico
  • Wilfrido Miguel Contreras-Sánchez Universidad Juárez Autónoma de Tabasco, Mexico
  • Reynaldo Patiño Cooperative Fish and Wildlife Research Units, United States
  • Arlette Amalia Hernández-Franyutti Universidad Juárez Autónoma de Tabasco, Mexico
  • Ulises Hernández-Vidal Universidad Juárez Autónoma de Tabasco, Mexico
  • Rafael Martínez-García Universidad Juárez Autónoma de Tabasco, Mexico
Keywords: Feminization, 17β-estradiol, common snook

Abstract

Common snook Centropomus undecimalis is a protandric fish with a high commercial importance and aquacultural potential in Mexico and the United States. Several studies indicate that females have higher growth capacity than males. For this reason, the objective of this research was to evaluate the effect of a 17β-estradiol (E2) diet supplementation on sex proportion for this species. In this sense, an experimental study was conducted where fish were fed for different time periods (7, 14, 21, 28, 35, and 42 days) with food impregnated with 50 mg of E2/Kg, and one control diet without the presence of the steroid. After feeding times, fish were raised for additional 204 days with the control diet to evaluate sex proportion, growth and survival. Our results showed that fish fed with E2 for 21 days or more had the highest female sex proportion (93-100%), while the control group showed the highest male proportion (100%). The highest growth (weight and total length) was detected in fish fed with E2 for 21 days (193.11 ± 1.83 mm and 28.56 ± 0.63 g) compared with the rest of the treatments. Survival did not show statistical differences between treatments (92-98%). We conclude that high percentage of C. undecimalis females can be obtained when fish are fed for 21 days or more with artificial food supplemented with E2.

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Author Biographies

Juan Manuel Vidal-López, Universidad Juárez Autónoma de Tabasco

Laboratorio de Acuicultura Tropical, División Académica de Ciencias Biológicas

Carlos Alfonso Álvarez-González, Universidad Juárez Autónoma de Tabasco

Laboratorio de Acuicultura Tropical, División Académica de Ciencias Biológicas

Wilfrido Miguel Contreras-Sánchez, Universidad Juárez Autónoma de Tabasco

Laboratorio de Acuicultura Tropical, División Académica de Ciencias Biológicas

Arlette Amalia Hernández-Franyutti, Universidad Juárez Autónoma de Tabasco

Laboratorio de Acuicultura Tropical, División Académica de Ciencias Biológicas

Ulises Hernández-Vidal, Universidad Juárez Autónoma de Tabasco

Laboratorio de Acuicultura Tropical, División Académica de Ciencias Biológicas

Rafael Martínez-García, Universidad Juárez Autónoma de Tabasco

Laboratorio de Acuicultura Tropical, División Académica de Ciencias Biológicas

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Published
2012-12-31
How to Cite
Vidal-López, J., Álvarez-González, C., Contreras-Sánchez, W., Patiño, R., Hernández-Franyutti, A., Hernández-Vidal, U., & Martínez-García, R. (2012). Feminization of juveniles of White Robalo <i> Centropomus undecimalis</ i&gt; (Bloch 1792) using 17β-Estradiol. Journal of Marine and Coastal Sciences, 4, 83-93. https://doi.org/10.15359/revmar.4.5
Section
Scientific articles

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