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Absence of cellular damage in tropical newly hatched sharks (Chiloscyllium plagiosum) under ocean acidification conditions

2018Journal article Restricted access
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dc.contributor.authorLopes, Ana Rita
dc.contributor.authorSampaio, Eduardo
dc.contributor.authorSantos, Catarina
dc.contributor.authorCouto, Ana
dc.contributor.authorPegado, Maria Rita
dc.contributor.authorDiniz, Mário S.
dc.contributor.authorMunday, Philip L.
dc.contributor.authorRummer, Jodie L.
dc.contributor.authorRosa, Rui
dc.date.accessioned2020-01-19T20:48:00Z
dc.date.available2020-01-19T20:48:00Z
dc.date.issued2018
dc.description.abstractSharks have maintained a key role in marine food webs for 400 million years and across varying physicochemical contexts, suggesting plasticity to environmental change. In this study, we investigated the biochemical effects of ocean acidification (OA) levels predicted for 2100 (pCO2 ~ 900 μatm) on newly hatched tropical whitespotted bamboo sharks (Chiloscyllium plagiosum). Specifically, we measured lipid, protein, and DNA damage levels, as well as changes in the activity of antioxidant enzymes and non-enzymatic ROS scavengers in juvenile sharks exposed to elevated CO2 for 50 days following hatching. Moreover, we also assessed the secondary oxidative stress response, i.e., heat shock response and ubiquitin levels. Newly hatched sharks appear to cope with OA-related stress through a range of tissue-specific biochemical strategies, specifically through the action of antioxidant enzymatic compounds. Our findings suggest that ROS-scavenging molecules, rather than complex enzymatic proteins, provide an effective defense mechanism in dealing with OA-elicited ROS formation. We argue that sharks' ancient antioxidant system, strongly based on non-enzymatic antioxidants (e.g., urea), may provide them with resilience towards OA, potentially beyond the tolerance of more recently evolved species, i.e., teleosts. Nevertheless, previous research has provided evidence of detrimental effects of OA (interacting with other climate-related stressors) on some aspects of shark biology. Moreover, given that long-term acclimation and adaptive potential to rapid environmental changes are yet experimentally unaccounted for, future research is warranted to accurately predict shark physiological performance under future ocean conditions.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1007/s12192-018-0892-3pt_PT
dc.identifier.issn1355-8145
dc.identifier.urihttp://hdl.handle.net/10451/41209
dc.language.isoengpt_PT
dc.publisherSpringer Verlagpt_PT
dc.relation.publisherversionhttps://link.springer.com/article/10.1007%2Fs12192-018-0892-3pt_PT
dc.subjectCarbon dioxidept_PT
dc.subjectCO2pt_PT
dc.subjectElasmobranchspt_PT
dc.subjectAntioxidant systemspt_PT
dc.subjectHeat shock responsept_PT
dc.subjectOxidative damagept_PT
dc.titleAbsence of cellular damage in tropical newly hatched sharks (Chiloscyllium plagiosum) under ocean acidification conditionspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage846pt_PT
oaire.citation.issue5pt_PT
oaire.citation.startPage837pt_PT
oaire.citation.titleCell Stress and Chaperonespt_PT
oaire.citation.volume23pt_PT
person.familyNameLopes
person.familyNameSampaio
person.familyNameSantos
person.familyNameCouto
person.familyNamede Carvalho Godinho Macedo Pegado
person.familyNameDiniz
person.familyNameRosa
person.givenNameAna Rita
person.givenNameEduardo
person.givenNameCatarina
person.givenNameAna
person.givenNameMaria Rita
person.givenNameMario
person.givenNameRui
person.identifierH-3227-2014
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person.identifier.orcid0000-0002-3992-0715
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person.identifier.orcid0000-0001-6526-4291
person.identifier.orcid0000-0003-3050-7219
person.identifier.orcid0000-0003-0379-7505
person.identifier.orcid0000-0003-1571-0366
person.identifier.orcid0000-0003-2801-5178
person.identifier.ridO-3708-2015
person.identifier.ridC-7849-2013
person.identifier.ridA-4580-2009
person.identifier.scopus-author-id55895278700
person.identifier.scopus-author-id55427467500
person.identifier.scopus-author-id57201970532
person.identifier.scopus-author-id8980557700
person.identifier.scopus-author-id7102610088
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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