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Short- and medium-term exposure to ocean acidification reduces olfactory sensitivity in Gilthead Seabream

2019-07-03Journal article Open access
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dc.contributor.authorVelez, Zélia
dc.contributor.authorRoggatz, Christina C.
dc.contributor.authorBenoit, David M.
dc.contributor.authorHardege, Jörg D.
dc.contributor.authorHubbard, Peter
dc.date.accessioned2020-02-17T10:24:23Z
dc.date.available2020-02-17T10:24:23Z
dc.date.issued2019-07-03
dc.date.updated2020-02-16T23:37:00Z
dc.description.abstractThe effects of ocean acidification on fish are only partially understood. Studies on olfaction are mostly limited to behavioral alterations of coral reef fish; studies on temperate species and/or with economic importance are scarce. The current study evaluated the effects of short- and medium-term exposure to ocean acidification on the olfactory system of gilthead seabream (Spares aurata), and attempted to explain observed differences in sensitivity by changes in the protonation state of amino acid odorants. Short-term exposure to elevated PCO2 decreased olfactory sensitivity to some odorants, such as L-serine, L-leucine, L-arginine, L-glutamate, and conspecific intestinal fluid, but not to others, such as L-glutamine and conspecific bile fluid. Seabream were unable to compensate for high PCO2 levels in the medium term; after 4 weeks exposure to high PCO2 , the olfactory sensitivity remained lower in elevated PCO2 water. The decrease in olfactory sensitivity in high PCO2 water could be partly attributed to changes in the protonation state of the odorants and/or their receptor(s); we illustrate how protonation due to reduced pH causes changes in the charge distribution of odorant molecules, an essential component for ligand-receptor interaction. However, there are other mechanisms involved. At a histological level, the olfactory epithelium contained higher densities of mucus cells in fish kept in high CO2 water, and a shift in pH of the mucus they produced to more neutral. These differences suggest a physiological response of the olfactory epithelium to lower pH and/or high CO2 levels, but an inability to fully counteract the effects of acidification on olfactory sensitivity. Therefore, the current study provides evidence for a direct, medium term, global effect of ocean acidification on olfactory sensitivity in fish, and possibly other marine organisms, and suggests a partial explanatory mechanism.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3389/fphys.2019.00731pt_PT
dc.identifier.issn1664-042X
dc.identifier.slugcv-prod-657436
dc.identifier.urihttp://hdl.handle.net/10400.1/13514
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherFrontiers Mediapt_PT
dc.relationHow ocean acidification affects olfaction in fish: a mechanistic approach.
dc.relationCentre of Marine Sciences
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectOlfactionpt_PT
dc.subjectOcean acidificationpt_PT
dc.subjectFishpt_PT
dc.subjectAmino acidpt_PT
dc.subjectReceptorpt_PT
dc.subjectOlfactory epitheliumpt_PT
dc.subjectCarbon dioxidept_PT
dc.subjectProtonationpt_PT
dc.titleShort- and medium-term exposure to ocean acidification reduces olfactory sensitivity in Gilthead Seabreampt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleHow ocean acidification affects olfaction in fish: a mechanistic approach.
oaire.awardTitleCentre of Marine Sciences
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC%2FBIA-BMA%2F30262%2F2017/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F100409%2F2014/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMulti%2F04326%2F2019/PT
oaire.citation.startPage731pt_PT
oaire.citation.titleFrontiers in Physiologypt_PT
oaire.citation.volume10pt_PT
oaire.fundingStream9471 - RIDTI
oaire.fundingStream6817 - DCRRNI ID
person.familyNameVelez
person.familyNameHubbard
person.givenNameZélia
person.givenNamePeter
person.identifier.ciencia-id4412-F95B-34A2
person.identifier.ciencia-id951F-BA4B-A21F
person.identifier.orcid0000-0003-2761-4048
person.identifier.orcid0000-0002-3007-4647
person.identifier.ridM-5283-2013
person.identifier.ridB-2823-2008
person.identifier.scopus-author-id16176444400
person.identifier.scopus-author-id7005928467
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.cv.cienciaid4412-F95B-34A2 | Zélia Cristina Pereira Velez
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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