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dc.contributor.authorNæve, Ingun
dc.contributor.authorMommens, Maren
dc.contributor.authorArukwe, Augustine
dc.contributor.authorKjørsvik, Elin
dc.date.accessioned2021-09-15T12:52:01Z
dc.date.available2021-09-15T12:52:01Z
dc.date.created2019-01-10T15:32:54Z
dc.date.issued2018
dc.identifier.citationPhysiological Reports. 2018, 6:e13640 (9), 1-13.en_US
dc.identifier.issn2051-817X
dc.identifier.urihttps://hdl.handle.net/11250/2777440
dc.description.abstractAiming to explore ultrasound technology as a noninvasive method for maturation monitoring, we compared ultrasound observations and measurements in female Atlantic salmon (Salmo salar) during the last year before ovulation with standard, invasive methods such as gonadosomatic index (GSI), gonad histology and sex hormone analysis. Ultrasound measurements of ovaries correlated strongly (R > 0.9, P < 0.01) with ovary weight and GSI, and could be used as a noninvasive tool for GSI estimation. Using ultrasound, we were able to identify females with advanced oocyte development and elevated sex hormone and GSI levels earlier than previously observed. Histological studies confirmed these observations showing oocyte yolk accumulation 10 months before ovulation and 8 months before significant increase in sex hormones. Levels of the sex hormone 11-keto testosterone (11-KT) indicated a new role of this hormone at final maturation in salmon females. We propose the use of ultrasound as an alternative method to traditionally used invasive methods during sexual maturation monitoring in wild and farmed Atlantic salmon broodstock populations. Eliminating sacrifice of valuable broodfish, and reducing handling stress, would improve animal welfare in present-day broodstock management.en_US
dc.language.isoengen_US
dc.publisherwileyen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleUltrasound as a non-invasive tool for monitoring reproductive physiology in female Atlantic salmon (Salmo salar)en_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber1-13en_US
dc.source.volume6:e13640en_US
dc.source.journalPhysiological Reportsen_US
dc.source.issue9en_US
dc.identifier.doi10.14814/phy2.13640
dc.identifier.cristin1654356
cristin.unitcode194,66,10,0
cristin.unitnameInstitutt for biologi
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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