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Thermal stress, thermal safety margins and acclimation capacity in tropical shallow waters—An experimental approach testing multiple end-points in two common fish

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dc.contributor.authorMadeira, Carolina
dc.contributor.authorMendonça, Vanessa
dc.contributor.authorLeal, Miguel
dc.contributor.authorFlores, Augusto A.V.
dc.contributor.authorCabral, Henrique
dc.contributor.authorDiniz, Mário S.
dc.contributor.authorVinagre, Catarina
dc.date.accessioned2019-06-25T15:49:21Z
dc.date.available2019-06-25T15:49:21Z
dc.date.issued2017
dc.description.abstractTropical organisms are predicted to be among the most impacted by increasing sea surface temperatures, particularly those from intertidal habitats. In this study, a complete thermal biology assessment was conducted for two widespread tropical Atlantic shallow reef fish: Abudefduf saxatilis (damselfish) and Scartella cristata (blenny), which make extensive use of tide pools. The main objectives were to measure the time-course changes during one month in i) thermal and oxidative stress biomarkers (in gills, muscle and skin), ii) upper thermal limits, acclimation capacity and thermal safety margins and iii) body size, condition and energy reserves (total protein and lipid contents), under two temperature treatments (control – mean summer temperature, and elevated temperature − + 3 °C, as projected by climate warming scenarios for the end of this century). Results from biomarker analyses suggest that under increased temperature, both species displayed a typical response of physiological stress characterized by the activation of molecular chaperones and antioxidant protection. Both species presented a significant acclimation potential in the long term, as shown by increased critical thermal maxima values at higher temperature. However, these species may already be at risk during summer heat waves, as thermal safety margins for both species were low. Additionally, despite acclimation, some energetic tradeoffs may exist, since specimens from both species showed smaller body sizes at higher temperature (even though maintaining body condition). Finally, temperature treatments had a significant influence not only in the total amount of energy reserves (lipid contents) but also in their rate of deposition or depletion (total proteins and lipid contents). This is the first multi-end-point holistic approach to assess the impact of warming in shallow tropical water fish and it highlights the high risk that intertidal organisms are facing in both present and future sea surface temperature conditions.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.ecolind.2017.05.050pt_PT
dc.identifier.issn1470-160X
dc.identifier.urihttp://hdl.handle.net/10451/38895
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectTropical fishpt_PT
dc.subjectBiomarkerspt_PT
dc.subjectThermal tolerancept_PT
dc.subjectOcean warmingpt_PT
dc.subjectIntertidalpt_PT
dc.subjectEnvironmental biomonitoringpt_PT
dc.titleThermal stress, thermal safety margins and acclimation capacity in tropical shallow waters—An experimental approach testing multiple end-points in two common fishpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage158pt_PT
oaire.citation.startPage146pt_PT
oaire.citation.titleEcological Indicatorspt_PT
oaire.citation.volume81pt_PT
person.familyNameGusmão Coito Madeira
person.familyNameAlegria Mendonça
person.familyNameLeal
person.familyNameCabral
person.familyNameVinagre
person.givenNameSara Carolina
person.givenNameVanessa Sofia
person.givenNameMiguel
person.givenNameHenrique
person.givenNameCatarina
person.identifierIpgi3X4AAAAJ&hl
person.identifier138360
person.identifier.ciencia-id2419-0840-DBED
person.identifier.ciencia-idAE1E-EECE-EA4B
person.identifier.ciencia-idCD19-4B30-2D53
person.identifier.ciencia-id3F13-843A-791B
person.identifier.orcid0000-0003-1632-634X
person.identifier.orcid0000-0002-3658-9502
person.identifier.orcid0000-0003-0672-6251
person.identifier.orcid0000-0002-7646-6208
person.identifier.orcid0000-0003-2146-7948
person.identifier.ridC-8611-2009
person.identifier.ridD-5201-2011
person.identifier.scopus-author-id55345528500
person.identifier.scopus-author-id7006073782
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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