Seasonal expression of reproductive axis-related neuroendocrine genes and their relation with ovarian maturation in captive yellowtail kingfish (Seriola lalandi)

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dc.article.number55
dc.catalogadorpva
dc.contributor.authorPalomino, Jaime
dc.contributor.authorOlea, Ayleen
dc.contributor.authorRamírez, Stevanie
dc.contributor.authorDettleff Faúndes, Phillip James
dc.contributor.authorMoreno Mauro, Ricardo D.
dc.date.accessioned2025-08-25T16:50:15Z
dc.date.available2025-08-25T16:50:15Z
dc.date.issued2025
dc.date.updated2025-08-10T00:03:08Z
dc.description.abstractThe yellowtail kingfish (Seriola lalandi) is a key species for the diversification of Chilean aquaculture. While controlled reproduction is essential for reliable fish production, the physiological and molecular bases underlying its reproductive cycle remain insufficiently explored. This study aimed to assess the expression patterns of brain-expressed neuroendocrine mRNAs involved in the activation of brain-pituitary-gonad (BPG) axis throughout different year seasons and to correlate them with ovarian maturation stages in S. lalandi females under captive conditions. Reproductive stages were determined by ovarian histology and gonadosomatic index (GSI) analysis. Expression levels of GnRH1 and GnRH2 genes (gnrh1 and gnrh2) as well as melatonin (mtn1ra), dopamine (drd2a), and kisspeptin (kiss1r) receptors were quantified by real time PCR in brain samples from adult individuals. Fish were maintained in temperature- and photoperiod-controlled tanks simulating the four seasons. Histological and GSI analyses identified four distinct reproductive stages. Gene expression peaked in winter and decreased in autumn, aligning with the seasonal progression of ovarian development. These results are consistent with the expected activation of the reproductive axis during the winter months in S. lalandi. Notably, the elevated expression of drd2a in winter suggests that modulation of GnRH action on pituitary function may not rely solely on dopaminergic inhibition. Taken together, our findings indicate that S. lalandi exhibits reproductive dynamics under captivity that mirror those of wild populations, supporting its use as a reliable model for studying reproductive physiology. Moreover, its responsiveness to environmental cues under controlled conditions enables the development of experimental strategies that would be logistically unfeasible in the wild.
dc.fechaingreso.objetodigital2025-08-10
dc.format.extent9 páginas
dc.fuente.origenBiomed Central
dc.identifier.citationBiological Research. 2025 Aug 08;58(1):55
dc.identifier.doi10.1186/s40659-025-00622-5
dc.identifier.issn0717-6287
dc.identifier.urihttps://doi.org/10.1186/s40659-025-00622-5
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/105260
dc.information.autorucEscuela de Medicina Veterinaria; Dettleff Faúndes, Phillip James; S/I; 1252622
dc.information.autorucFacultad de Ciencias Biológicas; Moreno Mauro, Ricardo D.; 0000-0002-7499-5501; 76818
dc.issue.numero1
dc.language.isoen
dc.nota.accesocontenido completo
dc.publisherSpringer Nature
dc.revistaBiological Research
dc.rightsacceso abierto
dc.rights.holderThe Author(s)
dc.rights.licenseAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.ddc570
dc.subject.deweyBiologíaes_ES
dc.subject.ods03 Good health and well-being
dc.subject.ods14 Life below water
dc.subject.odspa03 Salud y bienestar
dc.subject.odspa14 Vida submarina
dc.titleSeasonal expression of reproductive axis-related neuroendocrine genes and their relation with ovarian maturation in captive yellowtail kingfish (Seriola lalandi)
dc.typeartículo
dc.volumen58
sipa.codpersvinculados1252622
sipa.codpersvinculados76818
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