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dc.creatorAlvarado,Manuel
dc.creatorSerrano,Edison
dc.creatorSánchez,Juan Carlos
dc.creatorValladares,Luis
dc.date2015-09-01
dc.date.accessioned2019-05-03T13:27:48Z
dc.date.available2019-05-03T13:27:48Z
dc.identifierhttps://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-560X2015000400002
dc.identifier.urihttp://revistaschilenas.uchile.cl/handle/2250/88118
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 β-dihydroxy-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 ß-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.
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dc.languageen
dc.publisherPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
dc.relation10.3856/vol43-issue4-fulltext-2
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourceLatin american journal of aquatic research v.43 n.4 2015
dc.subjectMerluccius australis
dc.subjectsouthern hake
dc.subjectgonad maturation
dc.subjectsex steroids
dc.subjectsouthern Chile
dc.titleChanges in plasma steroid hormones and gonadal histology associated with sexual maturation in wild southern hake (Merluccius australis)


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