FEMINIZATION OF NILE TILAPIA Oreochromis niloticus (L.) BY DIETHYLSTILBESTROL GROWTH AND GONADOSOMATIC INDEX

Autores/as

  • José Antonio Marín Ramírez SAGARPA. Antes: Universidad del Papaloapan
  • Juan Pablo Alcántar Vázquez Universidad del Papaloapan
  • Carolina Antonio Estrada Universidad del Papaloapan
  • Raúl Moreno de la Torre Universidad del Papaloapan
  • Daniel Calzada Ruíz Universidad del Papaloapan

DOI:

https://doi.org/10.19136/era.a3n7.789

Palabras clave:

O. niloticus, sex-reversal, anabolic effect, survival, gonadal development.

Resumen

Sex-reversal by exogenous hormones is the most common technique used to generate monosex popu- lations of Nile tilapia (Oreochromis niloticus). However, this technique has provoked a negative perception in recent years. Because of this, alternative techniques have been developed, including the production of YY males. Although the final product (for sale) is not administered hormones, the first part of this technique still requires the feminization of XY fry by use of estrogens, including some of a synthetic nature, such as diethylstilbestrol (DES), an estrogen that has shown particularly excellent results in related species. The aim of this study was to evaluate the effect of increasing concentrations of DES (100, 200, 300, and 400 mg kg−1 during the fry stage on the sex proportion, growth and gonadosomatic index (GSI) of Nile tilapia. The 400 mg kg−1 concentration was the one that produced the highest proportion of females (91 %). However, increasing the concentration of DES provided through diet does not guarantee a 100 % feminization rate. Additionally, the growth, survival and GSI, showed a significant decrease (p < 0.05) in all groups fed with DES compared to the control group. It is possible that the anabolic effect of DES observed in other species is not present in Nile tilapia.

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Biografía del autor/a

José Antonio Marín Ramírez, SAGARPA. Antes: Universidad del Papaloapan

Lic. en Zootecnia de la Universidad del Papaloapan, titulado a través de tesis realizada con feminización de tilapia del Nilo. Trabaja desde hace dos años bajo la dirección del Dr. Juan Pablo Alcántar Vázquez. Actualmente bajo contrato como PSP de Sagarpa para proyecto con productores de tilapia de la Presa Cerro de Oro. Lo anterior, en coordinación con el Dr. Alcántar y los M.C. Antonio y Moreno.

Juan Pablo Alcántar Vázquez, Universidad del Papaloapan

Profesor Investigador de la carrera de Ingeniería en Acuicultura. Especialidad en reproducción y Mejoramiento genético de peces marinos y dulceacuícolas.

Carolina Antonio Estrada, Universidad del Papaloapan

Profesor-Investigador del área de Ciencias Agropecuarias, carrera de Ingeniería en Acuicultura. Experiencia en alimentación de peces y áreas relacionadas. La M.C. Antonio ha trabajado desde hace 3 años en colaboración con el Dr. Alcántar en la generación de machos YY y hembras XY.

Raúl Moreno de la Torre, Universidad del Papaloapan

Profesor-Investigador del área de Ciencias Agropecuarias, carrera de Ingeniería en Acuicultura. Experiencia en nutrición de peces, crecimiento y análisis de progenies. El M.C. Moreno ha trabajado desde hace 3 años en colaboración con el Dr. Alcántar en la generación de machos YY y hembras XY.

Daniel Calzada Ruíz, Universidad del Papaloapan

Ing. En acuic. y resposanble del laboratorio de Acuicultura de la Universidad del Papaloapan. Experiencia mantenimiento, alimentación, análisis de gonadas y selección de potenciales machos YY y hembras XY dentro del proyecto para la producción de machos YY.

Citas

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Publicado

2015-11-19

Cómo citar

Marín Ramírez, J. A., Alcántar Vázquez, J. P., Antonio Estrada, C., Moreno de la Torre, R., & Calzada Ruíz, D. (2015). FEMINIZATION OF NILE TILAPIA Oreochromis niloticus (L.) BY DIETHYLSTILBESTROL GROWTH AND GONADOSOMATIC INDEX. Ecosistemas Y Recursos Agropecuarios, 3(7), 51–61. https://doi.org/10.19136/era.a3n7.789

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ARTÍCULOS CIENTÍFICOS