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Changes in plasma steroid hormones and gonadal histology associated with sexual maturation in wild southern hake (Merluccius australis)

dc.contributorCONICYT FONDEF DA09I 1001en-US
dc.creatorAlvarado, Manuel
dc.creatorSerrano, Edison
dc.creatorSánchez, Juan Carlos
dc.creatorValladares, Luis
dc.date2017-02-28
dc.date.accessioned2020-11-05T13:35:08Z
dc.date.available2020-11-05T13:35:08Z
dc.identifierhttp://lajar.ucv.cl/index.php/rlajar/article/view/vol43-issue4-fulltext-2
dc.identifier10.3856/vol43-issue4-fulltext-2
dc.identifier.urihttps://revistaschilenas.uchile.cl/handle/2250/158444
dc.descriptionA detailed study of gametes development and characterization of plasma sex steroid hormones during the maturation cycle was performed for the first time in the southern hake (Merluccius australis). Fish were caught in the inland waters of the Reloncaví Sound, Interior Sea of Chiloé, Chile. Samples of gonads and blood were collected for histology and sex steroid hormone (17 β-estradiol, 11-ketotestosterone and 17,20 βdihydroxy-4-pregnen-3-one) analysis, respectively. Sex steroid hormone quantification was performed using enzyme-immunoassay (ELISA). Results showed that M. australis males and females have asynchronous development of testicles and ovaries, in all stages of maturation. Most spawning fish were found during the spring months. Regarding the sex steroid hormones, serological fluctuations of 17 β-estradiol and 11- ketotestosterone were found during gonadal maturation of M. australis. These hormones are the main hormones responsible for vitelogenesis and spermatogenesis processes, respectively. Conversely, 17,20 β-dihydroxy-4- pregnen-3-one did not show any serological fluctuation in females and males. Further studies involving gonadotropins, 17,20 β,21-trihydroxy-4-pregnen-3-one and vitellogenin quantification are required in order to obtain a more complete description of the reproductive physiology of wild and farmed M. australis.  en-US
dc.formatapplication/pdf
dc.languageeng
dc.publisherPontificia Universidad Católica de Valparaísoen-US
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/view/vol43-issue4-fulltext-2/301
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/downloadSuppFile/vol43-issue4-fulltext-2/330
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/downloadSuppFile/vol43-issue4-fulltext-2/331
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/downloadSuppFile/vol43-issue4-fulltext-2/332
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/downloadSuppFile/vol43-issue4-fulltext-2/333
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/downloadSuppFile/vol43-issue4-fulltext-2/334
dc.sourceLatin American Journal of Aquatic Research; Vol 43, No 4 (2015); 632-640en-US
dc.sourcePlataforma para envío de artículos - Latin American Journal of Aquatic Research; Vol 43, No 4 (2015); 632-640es-ES
dc.source0718-560X
dc.source0718-560X
dc.subjectMerluccius australis; southern hake; gonad maturation; sex steroids; southern Chileen-US
dc.titleChanges in plasma steroid hormones and gonadal histology associated with sexual maturation in wild southern hake (Merluccius australis)en-US
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typeen-US
dc.typees-ES


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