Reproductive response of Gymnotus sp. (Teleostei: Gymnotiformes) to hormonal induction

Technological development for Gymnotus sp. farming is relevant because this species has a socio-economic impact in South American regions where sport fishing is an important activity. Although Gymnotus sp. breeds in captivity, fry survival in ponds can be unacceptable for culture systems. The object...

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Autores principales: López, Pablo Andrés, Rodrigues Ferreira Machado, Monica, de Oliveira Felizardo, Viviane, Solis-Murgas, Luis David, Vigliano, Fabricio A.
Formato: Artículo revista
Lenguaje:Español
Publicado: Universidad Nacional del Nordeste 2023
Materias:
reproducción artificial
hipofisación
gametos
semen
fertilización
artificial reproduction
hypophysation
gametes
fertilization
Acceso en línea:https://revistas.unne.edu.ar/index.php/vet/article/view/7045
Aporte de:
Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
id I48-R154-article-7045
record_format ojs
spelling I48-R154-article-70452023-11-28T13:51:28Z Reproductive response of Gymnotus sp. (Teleostei: Gymnotiformes) to hormonal induction Respuesta reproductiva a la inducción hormonal en Gymnotus sp. (Teleostei, Gymnotiformes) López, Pablo Andrés Rodrigues Ferreira Machado, Monica de Oliveira Felizardo, Viviane Solis-Murgas, Luis David Vigliano, Fabricio A. reproducción artificial hipofisación gametos semen fertilización artificial reproduction hypophysation gametes semen fertilization Technological development for Gymnotus sp. farming is relevant because this species has a socio-economic impact in South American regions where sport fishing is an important activity. Although Gymnotus sp. breeds in captivity, fry survival in ponds can be unacceptable for culture systems. The objective of this work was to test the response to hormonal induction of Gymnotus sp. with carp pituitary extract (CPE) and gonadotrophin-releasing hormone (GnRH) in relation to different male and female reproductive parameters. CPE treatment specimens were stripped 12 and 20 hours after the triggering dosage, and GnRH treatment specimens were stripped 10 and 12 hours after hormonal application. We could obtain positive results using CPE with a short capture-induction interval (C-II) with broodstock in mature stages of gonadal development. Percentage of oocytes with peripheral germinal vesicle (%OPGV) and oocyte diameter showed significant differences between groups treated with CPE. Oocytes could be successfully extracted from two females treated with CPE and stripped 12 hours after the last dosage. Semen was only extracted from males treated with CPE. GnRH stimulation did not give positive results because gametes could not be extracted with different doses and C-II used. This work is the first description of semen quality parameters in Gymnotus sp. Future works should focus on combining hormonal induction strategies with CPE and the management of environmental variables. El desarrollo tecnológico para el cultivo de Gymnotus sp. es relevante porque este género tiene un impacto socioeconómico en regiones sudamericanas donde la pesca deportiva es una actividad importante. Aunque Gymnotus sp. se reproduce en cautiverio, la supervivencia de los alevines en los estanques puede ser insuficiente para un sistema de cultivo. El objetivo de este trabajo fue evaluar la respuesta de diferentes parámetros reproductivos a la inducción hormonal en Gymnotus sp. con extracto bruto de hipófisis de carpa (EBH) y hormona liberadora de gonadotrofinas (GnRH). Las muestras de gametos del tratamiento con EBH se extrajeron 12 y 20 horas después de la dosis desencadenante, las muestras del tratamiento con GnRH se extrajeron 10 y 12 horas después de la aplicación hormonal. El porcentaje de ovocitos con vesícula germinal periférica (%OVGP) y el diámetro de los ovocitos mostraron diferencias significativas entre grupos tratados con EBH con un intervalo captura-inducción (IC-I) de corta duración, con reproductores en etapas avanzadas de desarrollo gonadal. Se pudieron extraer ovocitos con éxito a dos hembras inducidas con EBH, 12 horas después de la dosis desencadenante y, además, se extrajo semen sólo de los machos inducidos con EBH. La estimulación con GnRH no dio resultados positivos en las diferentes dosis e IC-I utilizados, dado que no se pudieron extraer gametos. Este trabajo es la primera descripción de los parámetros de calidad del semen en Gymnotus sp. Futuras líneas de trabajo deberán centrarse en el manejo de variables Universidad Nacional del Nordeste 2023-11-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unne.edu.ar/index.php/vet/article/view/7045 10.30972/vet.3427045 Revista Veterinaria; Vol. 34 Núm. 2 (2023); 61-68 1669-6840 1668-4834 spa https://revistas.unne.edu.ar/index.php/vet/article/view/7045/6519 https://creativecommons.org/licenses/by/2.5/ar/
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-154
container_title_str Revistas UNNE - Universidad Nacional del Noroeste (UNNE)
language Español
format Artículo revista
topic reproducción artificial
hipofisación
gametos
semen
fertilización
artificial reproduction
hypophysation
gametes
semen
fertilization
spellingShingle reproducción artificial
hipofisación
gametos
semen
fertilización
artificial reproduction
hypophysation
gametes
semen
fertilization
López, Pablo Andrés
Rodrigues Ferreira Machado, Monica
de Oliveira Felizardo, Viviane
Solis-Murgas, Luis David
Vigliano, Fabricio A.
Reproductive response of Gymnotus sp. (Teleostei: Gymnotiformes) to hormonal induction
topic_facet reproducción artificial
hipofisación
gametos
semen
fertilización
artificial reproduction
hypophysation
gametes
semen
fertilization
author López, Pablo Andrés
Rodrigues Ferreira Machado, Monica
de Oliveira Felizardo, Viviane
Solis-Murgas, Luis David
Vigliano, Fabricio A.
author_facet López, Pablo Andrés
Rodrigues Ferreira Machado, Monica
de Oliveira Felizardo, Viviane
Solis-Murgas, Luis David
Vigliano, Fabricio A.
author_sort López, Pablo Andrés
title Reproductive response of Gymnotus sp. (Teleostei: Gymnotiformes) to hormonal induction
title_short Reproductive response of Gymnotus sp. (Teleostei: Gymnotiformes) to hormonal induction
title_full Reproductive response of Gymnotus sp. (Teleostei: Gymnotiformes) to hormonal induction
title_fullStr Reproductive response of Gymnotus sp. (Teleostei: Gymnotiformes) to hormonal induction
title_full_unstemmed Reproductive response of Gymnotus sp. (Teleostei: Gymnotiformes) to hormonal induction
title_sort reproductive response of gymnotus sp. (teleostei: gymnotiformes) to hormonal induction
description Technological development for Gymnotus sp. farming is relevant because this species has a socio-economic impact in South American regions where sport fishing is an important activity. Although Gymnotus sp. breeds in captivity, fry survival in ponds can be unacceptable for culture systems. The objective of this work was to test the response to hormonal induction of Gymnotus sp. with carp pituitary extract (CPE) and gonadotrophin-releasing hormone (GnRH) in relation to different male and female reproductive parameters. CPE treatment specimens were stripped 12 and 20 hours after the triggering dosage, and GnRH treatment specimens were stripped 10 and 12 hours after hormonal application. We could obtain positive results using CPE with a short capture-induction interval (C-II) with broodstock in mature stages of gonadal development. Percentage of oocytes with peripheral germinal vesicle (%OPGV) and oocyte diameter showed significant differences between groups treated with CPE. Oocytes could be successfully extracted from two females treated with CPE and stripped 12 hours after the last dosage. Semen was only extracted from males treated with CPE. GnRH stimulation did not give positive results because gametes could not be extracted with different doses and C-II used. This work is the first description of semen quality parameters in Gymnotus sp. Future works should focus on combining hormonal induction strategies with CPE and the management of environmental variables.
publisher Universidad Nacional del Nordeste
publishDate 2023
url https://revistas.unne.edu.ar/index.php/vet/article/view/7045
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first_indexed 2024-08-21T22:35:52Z
last_indexed 2024-08-21T22:35:52Z
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