Padrões de uso de habitat e conectividade populacional do dentão Lutjanus jocu em ambientes tropicais do Atlântico Sul-Ocidental e estudos ecológicos complementares

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dc.contributor.advisor-co1Soeth, Marcelo
dc.contributor.advisor-co1IDhttps://orcid.org/0000-0003-3968-1993
dc.contributor.advisor-co1Latteshttp://lattes.cnpq.br/6106446866576597
dc.contributor.advisor1Silva, Mauricio Hostim
dc.contributor.advisor1IDhttps://orcid.org/0000-0001-5061-9125
dc.contributor.advisor1Latteshttp://lattes.cnpq.br/7529427825546114
dc.contributor.authorDerviche, Patrick
dc.contributor.authorIDhttps://orcid.org/0000-0003-3328-9755
dc.contributor.authorLatteshttp://lattes.cnpq.br/3120311780427357
dc.contributor.referee1Bezerra, Natalia Priscila Alves
dc.contributor.referee1IDhttps://orcid.org/
dc.contributor.referee1Latteshttp://lattes.cnpq.br/5613525779232672
dc.contributor.referee2Joyeux, Jean Christophe
dc.contributor.referee2IDhttps://orcid.org/
dc.contributor.referee2Latteshttp://lattes.cnpq.br/9764759048676848
dc.contributor.referee3Tanner, Susanne
dc.contributor.referee3IDhttps://orcid.org/0000-0003-2225-7002
dc.contributor.referee3Latteshttp://lattes.cnpq.br/0474621874485055
dc.contributor.referee4Correia, Alberto Teodorico Rodrigues Moura
dc.contributor.referee4IDhttps://orcid.org/0000-0002-2831-025X
dc.date.accessioned2025-06-24T12:46:25Z
dc.date.available2025-06-24T12:46:25Z
dc.date.issued2025-05-12
dc.description.abstractAlthough the dog snapper (Lutjanus jocu), plays a major ecological and economic role in coastal and marine systems, the populations are currently facing overfishing in the Abrolhos Bank, SW Atlantic. Therefore, the following three specific goals were established: (i) to assess the habitat use along the ontogeny of juveniles in a tropical estuary, (ii) to assess the effects of water chemistry variability on otolith elemental signatures of juveniles within a dynamic estuarine nursery habitat, and (iii) to assess the contribution of distinct nursery habitats (NHs) to the exploited individuals found in adult grounds (AGs). Briefly, in the first chapter, stable isotope analysis of 57 juveniles revealed a major dependency on sheltered estuarine habitats (75.9 ± 5.5%), represented by mangroves. However, the contribution of marine habitats to their isotopic composition decreased considerably as TL increased (from 26.8% to 6.2%), suggesting their recent ingression into the estuarine NH. The second chapter assessed the otolith elemental signatures and water chemistry of a range of elements (Mg, Mn, Cu, Zn, Sr, and Ba) relative to calcium along a salinity gradient and monthly for a year, covering distinct seasons. Using generalized linear mixed models (GLMMs), we found that water chemistry alone does not fully explain the otolith signatures, suggesting that additional factors play a role depending on the element. The environmental signals driving otolith signatures varied by element, with Ba:Ca showing the narrowest temporal window of influence. The third chapter assessed the connectivity among juvenile (n = 98) and adult (n = 69) dog snappers across three NHs and two AGs along over 400 km of a tropical coastline. Otolith multi-elemental signatures, analyzed using a Random Forest model, revealed that 84.0% of exploited stock from southward upwelling AGs originated from estuarine environments, highlighting mangrove dependency. In contrast, stock from northward warm-waters AGs displayed a higher diversity in In contrast, stock from northward warm-waters AGs displayed a higher diversity in nursery origins, with most individuals coming from the sea environment (75.0%), consisting of biogenic coral and rocky reefs. Our findings provide new insights into the understanding of the dog snapper’s biology and ecology, which may support decision-making and conservation efforts. Besides that, I present four complementary studies related to marine ecological studies conducted during my doctorate
dc.description.resumoNão disponível
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa e Inovação do Espírito Santo (Fapes)
dc.formatText
dc.identifier.urihttp://repositorio.ufes.br/handle/10/19799
dc.languagepor
dc.language.isoen
dc.publisherUniversidade Federal do Espírito Santo
dc.publisher.countryBR
dc.publisher.courseDoutorado em Oceanografia Ambiental
dc.publisher.departmentCentro de Ciências Humanas e Naturais
dc.publisher.initialsUFES
dc.publisher.programPrograma de Pós-Graduação em Oceanografia Ambiental
dc.rightsopen access
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectStable isotopes
dc.subjectOtolith chemistry
dc.subjectNursery habitats
dc.subjectFish movement
dc.subjectCommercial species
dc.subjectFood web
dc.subjectStock delineation
dc.subjectUpwelling
dc.subjectLutjanidae
dc.subject.cnpqCiências Ambientais
dc.titlePadrões de uso de habitat e conectividade populacional do dentão Lutjanus jocu em ambientes tropicais do Atlântico Sul-Ocidental e estudos ecológicos complementares
dc.title.alternativeHabitat use patterns and population connectivity of the dog snapper Lutjanus jocu in tropical environments of the Southwestern Atlantic and complementary ecological studies
dc.typedoctoralThesis
foaf.mboxpatrickderviche@gmail.com
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Doutorado em Oceanografia Ambiental