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dc.contributor.authorAnderson, Kelli
dc.contributor.authorSwanson, Penny
dc.contributor.authorPankhurst, Ned
dc.contributor.authorKing, Harry
dc.contributor.authorElizur, Abigail
dc.date.accessioned2017-05-03T13:16:58Z
dc.date.available2017-05-03T13:16:58Z
dc.date.issued2012
dc.identifier.issn0044-8486
dc.identifier.doi10.1016/j.aquaculture.2011.12.026
dc.identifier.urihttp://hdl.handle.net/10072/49702
dc.description.abstractExposure of female Atlantic salmon to elevated temperature can result in a dramatic reduction in egg fertility and embryo survival. Reductions in plasma 17߭estradiol (E2) levels are associated with much of the observed reduction in reproductive performance; however, the molecular basis for reduced E2 levels remains unknown. This study examined gene expression of ovarian steroidogenic enzymes and plasma levels of gonadotropins in maiden and repeat spawning Atlantic salmon exposed to higher than normal temperatures. Circulating levels of follicle stimulating hormone (Fsh) were significantly elevated in both maiden and repeat spawning fish maintained at 22 àcompared to 14 àduring vitellogenesis, but plasma luteinising hormone levels were mostly unaffected. In contrast, gene expression of the ovarian p450 aromatase a and cholesterol side chain cleavage protein were depressed at 22 àcompared to 14 î Hepatic gene expression of estrogen receptor alpha did not change with thermal challenge. The results show that the ovarian response to Fsh is inhibited at 22 ì at least partly as a result of reduced expression of genes coding for steroidogenic enzymes.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent339623 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.publisher.placeNetherlands
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom205
dc.relation.ispartofpageto212
dc.relation.ispartofjournalAquaculture
dc.relation.ispartofvolume334-337
dc.rights.retentionY
dc.subject.fieldofresearchZoology
dc.subject.fieldofresearchFisheries sciences
dc.subject.fieldofresearchFish physiology and genetics
dc.subject.fieldofresearchcode3109
dc.subject.fieldofresearchcode3005
dc.subject.fieldofresearchcode300504
dc.titleEffect of thermal challenge on plasma gonadotropin levels and ovarian steroidogenesis in female maiden and repeat spawning Tasmanian Atlantic salmon (Salmo salar)
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.rights.copyright© 2012 Elsevier Inc. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
gro.date.issued2015-06-12T05:01:00Z
gro.hasfulltextFull Text
gro.griffith.authorPankhurst, Ned W.


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