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dc.contributor.authorCabrita, Elsa-
dc.contributor.authorSoares, F.-
dc.contributor.authorBeirão, J.-
dc.contributor.authorGarcía-López, Ángel-
dc.contributor.authorMartínez-Rodríguez, Gonzalo-
dc.contributor.authorDinis, M. T.-
dc.date.accessioned2012-02-13T10:23:06Z-
dc.date.available2012-02-13T10:23:06Z-
dc.date.issued2010-09-15-
dc.identifier.citationTheriogenology 75(1): 1-9 (2011)es_ES
dc.identifier.issn0093-691X-
dc.identifier.otherPMID: 20833416-
dc.identifier.urihttp://hdl.handle.net/10261/45452-
dc.description9 páginas, 4 figuras.es_ES
dc.description.abstractImproving fertilization success in captive Senegalese sole broodstocks has been a challenge in the last years. Recent reports suggest that low sperm volume and quality could be one of the reasons leading to poor fertilization rates, although further studies are needed to reach a conclusive explanation. Here, we report on several experiments focused on this issue. Seasonal profiles of plasma androgen levels (testosterone and 11-ketotestosterone) and sperm production and quality parameters were assessed, although no statistical correlations among them were identified. The response of males to female presence/absence was also analyzed. Long-term isolation from females decreased male androgen levels at the peak of the reproductive period, suggesting some kind of disrupting effects on the endocrine system. On the other hand, short-term exposure of previously isolated males to ripe females decreased androgen levels, possibly reflecting a rapid steroidogenic shift promoting final maturation of spermatozoa, and increased sperm viability, motility and velocity, thus, supporting the concept of positive effects of female contact on male sole performance. Further evidence sustaining the relevant female-to-male communication in sole reproduction was obtained after treating the females with progestagen 17α,20β-dihydroxy-4-pregnen-3-one (regarded as pre-ovulatory pheromone in fish) and registering a significant increase in sperm viability, velocity and motility in surrounding males. Finally, we found that a single administration of a 20 μg/kg GnRH analogue in males was effective in stimulating androgen release and sperm quality, although the effects were transient and thus, the use of sustained hormone delivery methods were suggested for improving efficiency. Our results point to velocity, viability, and motility as the most sensitive parameters in sole sperm, although further studies will have to evaluate whether these parameters have any relation with fertilization success in captive broodstocks of this important aquaculture species.es_ES
dc.description.sponsorshipThis work was supported by a Mare project-FISHWEL (2006.71.001443.9) and FCT project (CRYOSPERM PTDC/MAR/64533/2006).es_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.rightsclosedAccesses_ES
dc.subjectSolea senegalensises_ES
dc.subjectSperm qualityes_ES
dc.subjectSexual hormoneses_ES
dc.subjectSperm mtilityes_ES
dc.titleEndocrine and milt response of Senegalese sole, Solea senegalensis, males maintained in captivityes_ES
dc.typeartículoes_ES
dc.identifier.doi10.1016/j.theriogenology.2010.07.003-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.theriogenology.2010.07.003es_ES
dc.identifier.e-issn1879-3231-
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.openairetypeartículo-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextnone-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextNo Fulltext-
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