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Metal accumulation in female green sea turtles (Chelonia mydas) from Eastern Atlantic affects their egg quality with potential implications for embryonic development

2024-06Journal article Open access
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dc.contributor.authorMorão, Inês F.C.
dc.contributor.authorSimões, Tiago
dc.contributor.authorCasado, Roger B.
dc.contributor.authorVieira, Sara
dc.contributor.authorFerreira-Airaud, Betânia
dc.contributor.authorCaliani, Ilaria
dc.contributor.authorNoi, Agata Di
dc.contributor.authorCasini, Silvia
dc.contributor.authorFossi, Maria C.
dc.contributor.authorLemos, Marco F.L.
dc.contributor.authorNovais, Sara C.
dc.date.accessioned2024-09-17T12:19:17Z
dc.date.available2024-09-17T12:19:17Z
dc.date.issued2024-06
dc.description.abstractSea turtles, with their global distribution and complex life cycle, often accumulate pollutants such as metals and metalloids due to their extended lifespan and feeding habits. However, there are limited studies exploring the impact of metal pollution on the reproductive health of female sea turtles, specifically focusing on the quality of their eggs, which has significant implications for the future generations of these charismatic animals. Sao Tome Island, a crucial nesting and feeding habitat for green sea turtles, underscores the urgent need for comprehensive research in this ecologically significant area. This study aimed to investigate whether metals and metalloids in the blood of nesting female green sea turtles induce genotoxic effects in their erythrocytes and affect their egg morphometric characteristics and the composition of related compartments. Additionally, this study aimed to evaluate whether the quality of energetic reserves for embryo development (fatty acids in yolk's polar and neutral lipids) is influenced by the contamination status of their predecessors. Results revealed correlations between Cu and Hg levels and increased "lobed" erythrocytes, while As and Cu negatively influenced shell thickness. In terms of energy reserves, both polar and neutral lipid fractions contained primarily saturated and monounsaturated fatty acids, with prevalent 18:1n-9, 18:0, 16:0, 14:0, and 12:0 fatty acids in yolk samples. The yolk polar fraction was more susceptible to contaminant levels in female sea turtles, showing consistent negative correlations between pollution load index and essential n3 fatty acids, including linolenic, eicosatrienoic, eicosapentaenoic, and docosapentaenoic acids, crucial for embryonic development. These metals accumulation, coupled with the reduced availability of these key fatty acids, may disrupt the eicosanoid and other important pathways, affecting reproductive development. This study reveals a negative correlation between metal contamination in female sea turtles' blood and egg lipid reserves, raising concerns about embryonic development and the species' future generations.eng
dc.description.sponsorship10.54499/2021.02559.CEECIND; PD/BD/150562/2019)
dc.identifier.doi10.1016/j.scitotenv.2024.172710
dc.identifier.issn0048-9697
dc.identifier.urihttp://hdl.handle.net/10400.1/25898
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationMarine and Environmental Sciences Centre
dc.relationMarine and Environmental Sciences Centre
dc.relationAquatic Research Infrastructure Network
dc.relation.ispartofScience of The Total Environment
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectErythrocytic nuclear abnormalities
dc.subjectFatty acids
dc.subjectGenotoxicity
dc.subjectPollution load index
dc.subjectReproduction
dc.subjectTrace elements
dc.titleMetal accumulation in female green sea turtles (Chelonia mydas) from Eastern Atlantic affects their egg quality with potential implications for embryonic developmenteng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMarine and Environmental Sciences Centre
oaire.awardTitleMarine and Environmental Sciences Centre
oaire.awardTitleAquatic Research Infrastructure Network
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04292%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04292%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0069%2F2020/PT
oaire.citation.startPage172710
oaire.citation.titleScience of the total environment
oaire.citation.volume931
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameVieira
person.familyNameFerreira-Airaud
person.givenNameSara
person.givenNameBetânia
person.identifier.orcid0000-0001-6113-1862
person.identifier.orcid0000-0002-2874-1367
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
relation.isAuthorOfPublication73f56099-e152-4991-980f-280d42081ec9
relation.isAuthorOfPublicationc2275039-b13c-47a9-bf82-548693f2996e
relation.isAuthorOfPublication.latestForDiscovery73f56099-e152-4991-980f-280d42081ec9
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