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Effect of long-term thermal challenge on the Antarctic notothenioid Notothenia rossii

2019-08Journal article Restricted access
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dc.contributor.authorKandalski, Priscila Krebsbach
dc.contributor.authorZaleski, Tania
dc.contributor.authorForgati, Mariana
dc.contributor.authorBaduy, Flávia
dc.contributor.authorEugenio, Danilo Santos
dc.contributor.authorMachado, Cintia
dc.contributor.authorDmengeon Pedreiro de Souza, Maria Rosa
dc.contributor.authorPiechnik, Claudio Adriano
dc.contributor.authorFavaro, Luis Fernando
dc.contributor.authorDonatti, Lucelia
dc.date.accessioned2020-07-24T10:51:52Z
dc.date.available2020-07-24T10:51:52Z
dc.date.issued2019-08
dc.description.abstractThe thermal stability of the Antarctic Ocean raises questions concerning the metabolic plasticity of Antarctic notothenioids to changes in the environmental temperature. In this study, Notothenia rossii survived 90 days at 8 degrees C, and their condition factor level was maintained. However, their hepatosomatic (0.29x) index decreased, indicating a decrease in nutrient storage as a result of changes in the energy demands to support survival. At 8 degrees C, the plasma calcium, magnesium, cholesterol, and triglyceride concentrations decreased, whereas the glucose (1.91x) and albumin (1.26x) concentrations increased. The main energy substrate of the fish changed from lipids to glucose due to a marked increase in lactate dehydrogenase activity, as demonstrated by an increase in anaerobic metabolism. Moreover, malate dehydrogenase activity increased in all tissues, suggesting that fish acclimated at 8 degrees C exhibit enhanced gluconeogenesis. The aerobic demand increased only in the liver due to an increase (2.23x) in citrate synthase activity. Decreases in the activities of superoxide dismutase, catalase, and glutathione-Stransferase to levels that are most likely sufficient at 8 degrees C were observed, establishing a new physiological activity range for antioxidant defense. Our findings indicate that N. rossii has some compensatory mechanisms that enabled its long-term survival at 8 degrees C.
dc.description.sponsorshipCAPESCAPES
dc.description.sponsorshipCNPqNational Council for Scientific and Technological Development (CNPq)
dc.description.sponsorshipFAPERJ through projects PNPD (CAPES) [2443/2011]
dc.description.sponsorshipEBA (MCTI/CNPq) [52.0125/2008-8]
dc.description.sponsorshipINCT-APA (CNPq)National Council for Scientific and Technological Development (CNPq) [574018/2008-5, FAPERJ E-26/170.023/2008]
dc.description.sponsorshipEBA (CNPq)National Council for Scientific and Technological Development (CNPq) [305562/2009-6, 305969/2012-9]
dc.identifier.doi10.1007/s10695-019-00660-3
dc.identifier.issn0920-1742
dc.identifier.issn1573-5168
dc.identifier.urihttp://hdl.handle.net/10400.1/14281
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSpringer
dc.subjectAntioxidant defense system
dc.subjectOxidative stress
dc.subjectBiochemical parameters
dc.subjectClimate-change
dc.subjectTemperature-acclimation
dc.subjectElevated-temperature
dc.subjectClarias-gariepinus
dc.subjectGoldfish tissues
dc.subjectAfrican catfish
dc.subjectCold adaptation
dc.titleEffect of long-term thermal challenge on the Antarctic notothenioid Notothenia rossii
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1461
oaire.citation.issue4
oaire.citation.startPage1445
oaire.citation.titleFish Physiology and Biochemistry
oaire.citation.volume45
person.familyNameBaduy vaz da Silva
person.givenNameFlávia
person.identifier.orcid0000-0003-4179-8111
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication91d3b104-7901-4405-876b-b27a6b387a61
relation.isAuthorOfPublication.latestForDiscovery91d3b104-7901-4405-876b-b27a6b387a61

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