Reproducción en cautiverio de Gymnotus omarorum (Linnaeus 1758) y su impacto en el desarrollo gonadal bajo distintas condiciones ambientales

P.A. López; S. Sánchez; L. D. S. Murgas; F. A. Vigliano

doi:10.30972/vet.3618085

Authors

P.A. López Universidad Nacional de Rosario. Facultad de Ciencias Veterinarias. Cátedra de Piscicultura. Centro de Investigaciones en Piscicultura Experimental (CIPEX-FCV-UNR, Argentina). https://orcid.org/0000-0002-8297-2262
S. Sánchez Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET, Argentina). Universidad Nacional del Nordeste. Facultad de Ciencias Veterinarias. Instituto de Ictiología del Nordeste https://orcid.org/0000-0002-8093-5759
L. D. S. Murgas Universidade Federal de Lavras (UFLA). Departamento de Medicina Veterinária https://orcid.org/0000-0002-0066-7505
F. A. Vigliano Universidad Nacional del Rosario. Facultad de Ciencias Veterinarias. Centro de Investigaciones en Piscicultura Experimental (CIPEX-FCV-UNR, Argentina). Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET, Argentina). Cátedra de Histología I y Embriología Básica https://orcid.org/0000-0003-3741-9270

DOI:

https://doi.org/10.30972/vet.3618085

Keywords:

reproductive success, folliculogenesis, juveniles, culture, environmental control

Abstract

The reproduction and breeding of Gymnotus omarorum in captivity could improve the working conditions of bait fishermen, enhance services for sport fishing, and contribute to the preservation of natural populations. This study aimed to evaluate the response of G. omarorum to hormonal induction of reproduction combined with environmental management factors, as well as to determine the effects of captive conditions on gonadal development and reproductive success. Two experiments were conducted. The first included hormonally induced and control groups maintained under semi-natural conditions, where reproduction occurred spontaneously in the fish tanks before the scheduled hormonal induction, approximately 80 days after the capture of wild broodstock. The second experiment compared two groups maintained under different captivity conditions (laboratory and semi-natural). Females kept under laboratory conditions showed a significant increase in regressing oocytes and a significant reduction in vitellogenic oocytes after the beginning of the experiment. However, these specimens successfully reproduced after being transferred to fish tanks under semi-natural conditions, demonstrating a recovery of reproductive capacity. Conversely, females in the semi-natural group did not exhibit changes in the number of regressing oocytes or any negative effects on reproductive performance. Evidence suggests that two reproductive events occurred in this group, as indicated by the size and coloration differences in larvae and juveniles captured at the end of the experiment. Additionally, the capture-to-reproduction interval in fish tanks under semi-natural conditions was shorter than previously reported. These findings highlight that breeding G. omarorum under semi-natural conditions can trigger spontaneous reproduction without the need for hormonal induction, making this approach a promising strategy for the productive development and conservation of this species.

Downloads

Download data is not yet available.

References

Albert JS, Crampton WGR. Diversity and Phylogeny of Neotropical Electric Fishes (Gymnotiformes). En: Electroreception. Springer New York; 2006. p. 360-409. Disponible en: http://link.springer.com/10.1007/0-387-28275-0_13

Andrade DR, Yasui GS. O manejo da reprodução natural e artificial e sua importância na produção de peixes no Brasil. Rev Bras Reprodução Anim. 2003; 27(2): 166-172.

Barbieri MC, Barbieri G. Reproduçäo de Gymnotus carapo (Linnaeus, 1758), na Represa do Lobo (SP). Morfologia e histologia de ovário. Variaçäo sazonal. (Teleostei, Gymnotidae). Rev. B ras. Biol. 1985; 3-12.

Carrillo M, Zanuy S, Bayarri MJ. El control ambiental de la reproducción de los peces con especial referencia al control del ciclo sexual, de la pubertad y de la precocidad. En: Carrillo MA, Espinosa de los Monteros J, editores. La reproducción de los peces: aspectos básicos y sus aplicaciones en acuicultura. Madrid: Fundación Observatorio Español de Acuicultura; 2009. p. 173-246.

de Souza JR, de Andrade DR. Produção de sarapó Gymnotus carapo (Pisces: Gymnotidae) em cativeiro. Rev Ceres. 1984; 31(176): 308-309.

Escobar E, Regidor HA, Iwaszkiw J, Mosa SG. Análisis comparativo de la fecundidad del Sábalo Prochilodus lineatus en ambientes Lóticos y Lénticos de la Argentina. Rev Aquatic. 2011; (34): 1-11.

Ishiba R, Quagio-Grassiotto I, França GF. Aspectos estruturais do desenvolvimento gonadal e relação gonadossomática de machos e fêmeas ao longo do ciclo reprodutivo anual em Gymnotus cf. carapo. En: XXI Congresso de Iniciação Científica da UNESP. São José do Rio Preto. 2009; p. 9909-9918.

Iwaszkiw JM, Zappietro EG, Ferriz RA, Chiaramonte GE. Aportes a la biología de Gymnotus omarorum (Teleostei) de la Laguna Blanca, Parque Nacional Río Pilcomayo, Formosa: estado de condición, desarrollo gonadal y temporada reproductiva. Rev Mus Arg Cs Nat. 2016: 18 (2): 201-210.

Kirschbaum F. Reproduction and development of the weakly electric fish, Pollimyrus isidori (Mormyridae, Teleostei) in captivity. Environ Biol Fishes. 1987; 20: 11-31.

Kirschbaum F, Schugardt C. Reproductive strategies and developmental aspects in mormyrid and gymnotiform fishes. J Physiol-Paris. 2002; 96(5-6): 557-566.

Kirschbaum F, Wieczorek L. Entdeckung einer neuen Fortpflanzungs-strategie bei südamerikainischen Messerfischen (Teleostei: Gymnotiformes: Gymnotidae): Maulbrüten bei Gymnotus carapo. Verh Aquar. 2002; 2: 99-107.

Kirschbaum F, Leyendecker U, Nyogen B, Schulz C, Weitkamp H, Didhiou S, Thomas M, Schugardt C. Environmental control of cyclical reproduction of tropical freshwater fish: Evidence from comparative experimental data. Cybium. 2008; 32(3): 294-296.

López PA. Optimización de la reproducción de morenas (Gymnotus sp.) en condiciones de laboratorio mediante la utilización de diferentes protocolos de inducción hormonal. Tesis doctoral. Facultad de Ciencias Veterinarias, Universidad Nacional de Rosario, Casilda, Argentina. 2019. 83 pp.

López PA, Rodrigues Ferreira Machado M, de Oliveira Felizardo V, Murgas LDS, Vigliano FA. Respuesta reproductiva a la inducción hormonal en Gymnotus sp. (Teleostei : Gymnotiformes ). Rev Vet. 2023; 34(2): 61-68.

Mommsen TP, Korsgaard B. Vitellogenesis. En: Joâo Rocha M, Arukwe A, Kapoor BG, editors. Fish reproduction. Enfield, NH, USA: Science Publishers. 2008; p. 113-169.

Peixoto Gervásio MS. Uso e conservaçao de recursos naturais relacionados com a pesca desportiva e a explotaçao de iscas vivas no Pantanal Mato-Grossense, Brasil. Ensaios e Ciência Ciências Biológicas, Agrárias e da Saúde. 2006 Aug 5;10(1):181–194. Disponible en:http://www.redalyc.org/articulo.oa? id=26012756016

Rotta MA. Aspectos biológicos e reprodutivos para a criação da Tuvira (Gymnotus sp.) em cativeiro-I. Corumbá; 2004. (Documentos / Embrapa Pantanal ISSN 1517-1973; 74).

Rotta MA, Pedroso MF, Acorci LC. Determinâçao do sexo da tuvira Gymnotus sp. através da imagem de ultra-som. Boletim de Pesquisa e Desenvolvimento Embrapa Pantanal. Corumbá. 2007.

Rotta MA, Rodrigues RB, Pedroso MF, Acorci Filho LC, de Lara JAF, Streit Jr DP. Mass synchronization of gonadal maturation in banded knifefish broodstock (Gymnotus cf. carapo). Aquaculture. 2023; 574: 739702.

Soares de Oliveira M, Cândido Pereira RA, Kawakami de Resende E, Mayumi Ishikawa M, Fernandes dos Santos J, Soares J, et al. Avaliaçao da qualidade de água para manutençao de tuviras (Gymnotus cf carapo) em cativeiro, na unidade experimental do Porto da Manga, Corumbá, Pantanal de Mato Grosso Do Sul, Brasil. En: 1o Congresso Brasileiro de Produçao de Peixes Nativos de Agua Doce. Corumbá; 2004. p. 6.

Zubizarreta L, Quintana L, Hernández D, Mello FT De, Meerhoff M, Honjii RM, Moreira RG, Silvaid A. Seasonal and social factors associated with spacing in a wild territorial electric fish. PLoS One. 2020; 15(6): e0228976.