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Inter-island nesting dynamics and clutch survival of green turtles Chelonia mydas within a marine protected area in the Bijagós Archipelago, West Africa

2024-06Journal article Open access
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dc.contributor.authorRaposo, Cheila
dc.contributor.authorSampaio e rebelo, Rui
dc.contributor.authorCatry, Paulo
dc.contributor.authorFerreira-Airaud, Maria Betânia
dc.contributor.authorBarbosa, Castro
dc.contributor.authorGarcia, Tumbulo Bamba
dc.contributor.authorRegalla, Aissa
dc.contributor.authorSampaio, Manuel Sá
dc.contributor.authorPatrício, Ana Rita
dc.date.accessioned2024-07-25T13:18:04Z
dc.date.available2024-07-25T13:18:04Z
dc.date.issued2024-06
dc.description.abstractUnderstanding spatial heterogeneity in reproductive success among at-risk populations facing localised threats is key for conservation. Sea turtle populations often concentrate at one nesting site, diverting conservation efforts from adjacent smaller rookeries. Poilão Island, Bijagós Archipelago, Guinea-Bissau, is a notable rookery for green turtles Chelonia mydas within the João Vieira-Poilão Marine National Park, surrounded by three islands (Cavalos, Meio and João Vieira), with lower nesting activity. Poilão’s nesting suitability may decrease due to turtle population growth and sea level rise, exacerbating already high nest density. As the potential usage of secondary sites may arise, we assessed green turtle clutch survival and related threats in Poilão and its neighbouring islands. High nest density on Poilão leads to high clutch destruction by later turtles, resulting in surplus eggs on the beach surface and consequently low clutch predation (4.0%, n = 69, 2000). Here, the overall mean hatching success estimated was 67.9 ± 36.7% (n = 631, 2015–2022), contrasting with a significantly lower value on Meio in 2019 (11.9 ± 23.6%, n = 21), where clutch predation was high (83.7%, n = 98). Moderate to high clutch predation was also observed on Cavalos (36.0%, n = 64) and João Vieira (76.0%, n = 175). Cavalos and Meio likely face higher clutch flooding compared to Poilão. These findings, alongside observations of turtle exchanges between islands, may suggest a source-sink dynamic, where low reproductive output sink habitats (neighbouring islands) are utilized by migrants from Poilão (source), which currently offers the best conditions for clutch survival.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1007/s00227-024-04463-wpt_PT
dc.identifier.urihttp://hdl.handle.net/10451/65474
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relationMAVA Foundation through the project “Consolidation of sea turtle conservation at the Bijagós Archipelago, Guinea-Bissau”pt_PT
dc.relationRegional Partnership for Coastal and Marine Conservation (PRCM), through the project “Survie des Tortues Marines”pt_PT
dc.relation“La Caixa” Foundation (ID 100010434) through a fellowship awarded to ARP (LCF/BQ/PR20/11770003)pt_PT
dc.relationFCT (UIDB/04292/2020 and UIDP/04292/2020) awarded to MAREpt_PT
dc.relationFCT LA/P/0069/2020 granted to the Associate Laboratory ARNETpt_PT
dc.relationFCT UIDB/00329/2020 with DOI https://doi.org/10.54499/UIDB/00329/2020pt_PT
dc.relationFCT PhD grant (2020.08549.BD)pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titleInter-island nesting dynamics and clutch survival of green turtles Chelonia mydas within a marine protected area in the Bijagós Archipelago, West Africapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue7pt_PT
oaire.citation.titleMarine Biologypt_PT
oaire.citation.volume171pt_PT
person.familyNameBorges Sampaio e Rebelo
person.familyNameCaldas Patrício
person.givenNameRui Miguel
person.givenNameAna Rita
person.identifier_TYZe1gAAAAJ&hl=pt-PT
person.identifier.ciencia-id651A-9349-61EF
person.identifier.ciencia-id8D15-F799-1252
person.identifier.orcid0000-0003-2544-1470
person.identifier.orcid0000-0003-4963-2343
person.identifier.scopus-author-id53981714800
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication621a851c-d356-4e35-857d-e6ffac529a13
relation.isAuthorOfPublication12ea888c-5a63-4e05-9128-0c88d9fa9cf5
relation.isAuthorOfPublication.latestForDiscovery12ea888c-5a63-4e05-9128-0c88d9fa9cf5

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