Long-term effects of temperatures on the physiological response of juveniles of the eurythermal sub-antarctic notothenioid Eleginops maclovinus

Simple item page
datacite.alternateIdentifier.citationAquaculture, 530, 2021
datacite.alternateIdentifier.doi10.1016/j.aquaculture.2020.735797
datacite.alternateIdentifier.issn0044-8486
datacite.creatorOyarzun-Salazar, R.
datacite.creatorRojas, J. J.
datacite.creatorPontigo, J. P.
datacite.creatorMardones, O.
datacite.creatorMunoz, J. L. P.
datacite.creatorDantagnan, P.
datacite.creatorVargas-Chacoff, L.
datacite.date2021
datacite.rightsRegistro bibliográfico
datacite.subjectEleginops maclovinus
datacite.subjectLong-term high temperature
datacite.subjectMortality
datacite.subjectGrowth
datacite.subjectEnergy substrates
datacite.subjectFatty acids
datacite.subjectSerotonin
datacite.subjectCatecholamines
datacite.titleLong-term effects of temperatures on the physiological response of juveniles of the eurythermal sub-antarctic notothenioid Eleginops maclovinus
dc.contributor.authorDANTAGNAN DANTAGNAN, HERMAN PATRICIO
dc.date.accessioned2025-10-06T14:21:42Z
dc.date.available2025-10-06T14:21:42Z
dc.description.abstractEleginops maclovinus is a subantartic notothenic with eurythermal characteristics and potential for Chilean aquaculture. However, the information regarding their physiological response to long-term temperatures and optimum temperature range for physiological process is unknown. In the present study, we evaluated under experimental conditions, the long-term effects (60 days) of temperatures of 15 degrees C and high temperatures of 20 and 25 degrees C, (10 degrees C as control) on the physiology of E. maclovinus juveniles. At the end of the experimental period, survival was 36% at 25 degrees C and mortality started after 30 days, while at the other temperatures the survival was 100%. The growth and food intake did not present significant differences at 10, 15 and 20 degrees C, while at 25 degrees C growth decreased at day 15, to subsequently present a compensatory growth at day 30 and finally a decrease in growth and food intake at day 60. In general, the energy substrates in liver, gills, serum, and spleen showed a significant decrease at 25 degrees C, with a marked decrease in triglycerides, while white muscle presented an opposite pattern with an increase in total lipids and glycogen at 25 degrees C. Serum cortisol and ammonium increased at the higher temperature suggesting an increased metabolism. In the brain, high temperatures had a marked effect on monoamine neurotransmitters, with increased levels of serotonin (5-HT) and norepinephrine (NAd). Fatty acids in white muscle were modulated by high temperatures. In general, saturated fatty acids were significantly decreased at higher temperatures, while for monounsaturated fatty acids only C20:1n9 showed a decrease at 25 degrees C. The most abundant polyunsaturated fatty acids in white muscle were C22:6n3 (DHA) and C20:5n3 (EPA), which did not change at a higher temperature, while C20:4n6 (ARA) and C18:3n3 (ALA) showed an increase and a decrease at 25 degrees C, respectively. In conclusion, we suggest that E. maclovinus juveniles tolerate up to 20 degrees C, increasing their metabolism without negatively affecting their physiology, while a temperature of 25 degrees C or higher could be lethal in a long-term scenario.
dc.description.ia_keyworddegrees, temperatures, while, decrease, maclovinus, long, term
dc.identifier.issn1873-5622
dc.identifier.urihttps://repositoriodigital.uct.cl/handle/10925/6748
dc.language.isoen
dc.publisherElsevier BV
dc.relationinstname: ANID
dc.relationreponame: Repositorio Digital RI2.0
dc.rights.driverinfo:eu-repo/semantics/openAccess
dc.sourceAquaculture
dc.subject.ia_odsODS 3: Salud y bienestar
dc.subject.ia_oecd1nCiencias Médicas y de la Salud
dc.subject.ia_oecd2nMedicina Clínica
dc.subject.ia_oecd3nCiencias Básicas de la Medicina
dc.type.driverinfo:eu-repo/semantics/article
dc.type.driverhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.type.openaireinfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication
oaire.citationEdition2021
oaire.citationTitleAquaculture
oaire.citationVolume530
oaire.fundingReferenceCONICYT FONDAP 15150003 (IDEAL)
oaire.fundingReferenceANID FONDECYT 1160877 (Regular)
oaire.fundingReferenceCONICYT Beca Doctorado Nacional 21160204
oaire.fundingReferenceUACh VIDCA
oaire.licenseConditionCopyright © Elsevier Inc, 2021
oaire.resourceTypeArtículo
oaire.resourceType.enArticle
relation.isAuthorOfPublication9ed02e88-c517-44ff-b002-91dfa5b40b99
relation.isAuthorOfPublication.latestForDiscovery9ed02e88-c517-44ff-b002-91dfa5b40b99
uct.catalogadorjvu
uct.comunidadRecursos Naturalesen_US
uct.departamentoDepartamento de Ciencias Agropecuarias y Acuícolas
uct.facultadFacultad de Recursos Naturales
uct.indizacionScience Citation Index Expanded - SCIE
uct.indizacionSCOPUS
uct.indizacionWOS
uct.indizacionDOAJ
Files
Collections
Producción Alimentaria