Variability in the production of larvae of Prochilodus magdalenae used in restocking programs in the Magdalena River, Colombia

Authors

  • Ana Carolina Torregroza-Espinosa Universidad del Magdalena, Facultad de Ingeniería, Programa de Ingeniería Pesquera, Laboratorio de Genética Molecular, Carrera 32 No. 22-08, Santa Marta, Colombia
  • Juan Carlos Narváez-Barandica Universidad del Magdalena, Facultad de Ingeniería, Programa de Ingeniería Pesquera, Laboratorio de Genética Molecular, Carrera 32 No. 22-08, Santa Marta, Colombia
  • Gilberto Orozco-Berdugo Universidad del Magdalena, Facultad de Ingeniería, Programa de Ingeniería Pesquera, Laboratorio de Genética Molecular, Carrera 32 No. 22-08, Santa Marta, Colombia

Keywords:

Individual heterozygosity, micro-satellites, preservation, reproduction

Abstract

The objective of this research was to evaluate the effect of individual genetic variability of spawners in the procurement (production and genetic quality) of Prochilodus magdalenae larvae, used in the repopulation programs in the Magdalena river (Colombia). The spawners system was used based on the genetic criteria of the Centro Acuícola y Agroindustrial de Gaira (SENA Magdalena, Colombia), forming groups with different levels of individual heterozygosity (Ho<=0.3; 0.3>Ho<=0.6 y Ho>0.6). The hormonal induction was done with Pituitary Carp Extract (PCE) using a dosage of 6.6 mg/Kg. The production parameters in the different levels of heterozygosity were measured, such as weight, fertility, fertilization rate, hatching and survival rate. The larvae obtained were fixed in alcohol at 96% for the genetic analyses performed through the use of seven loci micro-satellites. There were significant differences between the individual heterozygosity intervals both in the production parameters and in the genetic quality of the obtained progenies (p < 0.05). A decrease was detected in the heterozygosity observed in the obtained progenies (Ho=0.198, 0.203, 0.392) compared to the heterozygosity of the spawners (Ho=0.190, 0.444, 0.730) for the three intervals of heterozygosity evaluated. The parameters of weight production, fertilization rate and survival, as well as the genetic quality in terms of Ho and Fis of the obtained progenies, are positively related with the genetic variability of the spawners. It is therefore advised that in order to implement
breeding programs, spawners with individual heterozygosity values above 0.6 are used for the production of larvae destined to the repopulation of natural communities of P. magdalenae.

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How to Cite

Torregroza-Espinosa, A. C., Narváez-Barandica, J. C., & Orozco-Berdugo, G. (2016). Variability in the production of larvae of Prochilodus magdalenae used in restocking programs in the Magdalena River, Colombia. HIDROBIOLÓGICA, 25(2), 187–192. Retrieved from https://hidrobiologica.izt.uam.mx/index.php/revHidro/article/view/475

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