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Effects of cold seawater pre-treatments on induction of early sexual maturation and sperm production in European eel (Anguilla anguilla)

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Effects of cold seawater pre-treatments on induction of early sexual maturation and sperm production in European eel (Anguilla anguilla)

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dc.contributor.author Pires-Ferrão, María Leonor es_ES
dc.contributor.author Morini, Marina es_ES
dc.contributor.author González-López, Wendy Ángela es_ES
dc.contributor.author Gallego Albiach, Victor es_ES
dc.contributor.author Felip, Alicia es_ES
dc.contributor.author Pérez Igualada, Luz María es_ES
dc.contributor.author Asturiano, Juan F. es_ES
dc.date.accessioned 2024-11-29T19:08:02Z
dc.date.available 2024-11-29T19:08:02Z
dc.date.issued 2024-09-05 es_ES
dc.identifier.issn 0920-1742 es_ES
dc.identifier.uri http://hdl.handle.net/10251/212496
dc.description.abstract [EN] To induce sexual maturation in captivity, eels rely on hormonal treatments, but this process is costly and time-consuming. As an alternative, different types of conditioning, also referred as pre-treatment, have been assessed to ease hormonal treatment response. Recent studies have shown that migrating eels experience a wide range of temperatures, varying from 12 °C at night to as low as to 8 °C during the day. Therefore, this study evaluates the effects of low-temperature (10 °C) seawater pre-treatments of different durations (2 and 4 weeks) on male eel reproduction. The eye, gonadosomatic and hepatosomatic indexes from control (without thermic seawater pre-treatment) and pre-treated fish were measured. Blood and testis samples were also collected for sex steroid and histology analysis, respectively. Eels pre-treated for 2 weeks demonstrated increased progestin levels, comparing with the control group. Eels pre-treated for 4 weeks showed significantly higher gonadosomatic index and elevated androgens and estradiol levels in comparison with the remaining groups. In eels pre-treated for 2 and 4 weeks, there was an increase in the proportion of spermatogonia type B cells compared to undifferentiated spermatogonia type A, a differentiation process that was not observed in the control group. Cold seawater pre-treatment induced early sexual maturation, including steroid production, which consequently stimulated biometric changes and increased spermatogonia differentiation. Following the pre-treatments, eels started receiving standard hormonal treatment (with recombinant human chorionic gonadotropin at 20 °C). Pre-treated males started to spermiate earlier than the control group. In some treatment weeks, pre-treated individuals registered higher values of sperm density, motility, and kinetic parameters. Moreover, an economic evaluation was carried out relating the investment made in terms of hormone injections with the volume of high-quality sperm obtained from each experimental group. The low temperature pre-treatments demonstrated their economic effectiveness in terms of hormone treatment profitability, increasing the production of high-quality sperm in the European eel. Thus, this in vivo study suggests that cold seawater pre-treatment may increase sensitivity to the hormone applied during standard maturation treatment. es_ES
dc.description.sponsorship Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. Funded by the Spanish Ministry of Science, Innovation and Universities (MCIU; Project EELGONIA; RTI2018-096413-B-I00). L.F. had a PhD contract funded by the Generalitat Valenciana, Programa Grisolía (GRISOLIAP/2020/063). M.M. had a postdoctoral contract from the MCIU (MCIN/AEI/https:// doi.org/10.13039/501100011033) funded by European Union NextGenerationEU/ PRTR (C17. I1) and by Generalitat Valenciana (THINKINAZUL/2021/012) to SEASPERM. W.A.G.- L had a Margarita Salas postdoctoral contract (RD 289/2021.UAB) from the Spanish Ministry of Universities. V.G. had a Beatriz Galindo aid (BG22/00024; for the attraction of research talent 2022) funded by the Ministerio de Universidades (Spain). Funding for open access charge: CRUE-Universitat Politècnica de València es_ES
dc.language Inglés es_ES
dc.publisher Springer-Verlag es_ES
dc.relation.ispartof Fish Physiology and Biochemistry es_ES
dc.rights Reconocimiento (by) es_ES
dc.subject Anguilla anguilla es_ES
dc.subject Maturation es_ES
dc.subject Spermatogonia es_ES
dc.subject Temperature es_ES
dc.subject Testis es_ES
dc.subject.classification PRODUCCION ANIMAL es_ES
dc.title Effects of cold seawater pre-treatments on induction of early sexual maturation and sperm production in European eel (Anguilla anguilla) es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1007/s10695-024-01402-w es_ES
dc.relation.projectID info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-096413-B-I00/ES/DESARROLLO Y APLICACION DE LAS TECNICAS DE PRODUCCION SUBROGADA DE GAMETOS DE ANGUILA EUROPEA MEDIANTE XENOTRASPLANTE DE ESPERMATOGONIAS EN OTRAS ESPECIES DE PECES/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/GV INNOV.UNI.CIENCIA//THINKINAZUL%2F2021%2F012//Estudio del efecto de los cambios en los parámetros fisicoquímicos del agua de mar asociados al cambio climático sobre la fisiología espermática en especies de interés para la acuicultura mediterránea (SEASPERM)/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/GENERALITAT VALENCIANA//GRISOLIAP%2F2020%2F063//AYUDA SANTIAGO GRISOLIA: DESARROLLO Y APLICACION DE LAS TECNICAS DE PRODUCCION SUBROGADA DE GAMETOS DE ANGUILA EUROPEA MEDIANTE XENOTRASPLANTE DE ESPERMATOGONIAS./ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/UPV-VIN//PAID-01-20-21//Desarrollo y aplicación de las técnicas de producción subrogada de gametos de anguila europea mediante xenotrasplante de espermatogonias en otras especies de peces (EELGONIA)./ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MIU//BG22%2F00024/ es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto de Ciencia y Tecnología Animal - Institut de Ciència i Tecnologia Animal es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingeniería Agronómica y del Medio Natural - Escola Tècnica Superior d'Enginyeria Agronòmica i del Medi Natural es_ES
dc.description.bibliographicCitation Pires-Ferrão, ML.; Morini, M.; González-López, WÁ.; Gallego Albiach, V.; Felip, A.; Pérez Igualada, LM.; Asturiano, JF. (2024). Effects of cold seawater pre-treatments on induction of early sexual maturation and sperm production in European eel (Anguilla anguilla). Fish Physiology and Biochemistry. 50. https://doi.org/10.1007/s10695-024-01402-w es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1007/s10695-024-01402-w es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 50 es_ES
dc.identifier.pmid 39235533 es_ES
dc.identifier.pmcid PMC11573872 es_ES
dc.relation.pasarela S\525209 es_ES
dc.contributor.funder GENERALITAT VALENCIANA es_ES
dc.contributor.funder Ministerio de Universidades es_ES
dc.contributor.funder Agencia Estatal de Investigación es_ES
dc.contributor.funder UNIVERSIDAD POLITECNICA DE VALENCIA es_ES


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