2026-08-062026-08-062026-07-13MARCOS, Rebeca Sabrina Cunha. Caracterização mitogenômica de Elops affinis (Regan, 1909) e as implicações filogenéticas para a família Elopidae. Orientador: Rodrigo Petry Corrêa de Sousa. 2026. 42 f. Trabalho de Curso (Licenciatura em Ciências Biológicas) – Faculdade de Ciências Biológicas. Instituto de Estudos Costeiros, Campus Universitário de Bragança, Universidade Federal do Pará, Bragança-PA, 2026. Disponível em: https://bdm.ufpa.br/handle/prefix/9860. Acesso em: .https://bdm.ufpa.br/handle/prefix/9860The family Elopidae (Elopiformes) represents one of the most basal lineages of teleost fishes and plays an important role in understanding the evolution of modern bony fishes. Despite its wide geographic distribution and ecological importance, this family remains poorly explored from a molecular perspective, limiting robust inferences regarding its systematics, phylogeny, and evolutionary history. Among the species of the genus Elops, Elops affinis is particularly noteworthy due to its restricted distribution in the Eastern Pacific, making it a promising model for mitogenomic and evolutionary studies. In this context, the present study aimed to assemble, characterize, and analyze the complete mitochondrial genome of E. affinis, investigating its gene organization, nucleotide composition, codon usage patterns, and phylogenetic relationships. The mitochondrial genome was obtained through next-generation sequencing (NGS), followed by genome assembly, annotation, and comparative analyses with available mitogenomes from other Elopidae species. The mitogenome comprised 16,712 bp and exhibited the typical vertebrate gene organization, containing 13 protein-coding genes, 22 transfer RNA genes, two ribosomal RNA genes, and a control region, with no evidence of gene rearrangements or tandem repeats. Nucleotide composition analyses revealed an A+T bias over G+C and compositional asymmetry patterns consistent with those reported for other teleost fishes. Codon usage analysis indicated a bias in synonymous codon usage, with leucine and serine being the most abundant amino acids encoded by the mitochondrial genome. Phylogenetic analyses recovered Elops as a monophyletic group within Elopidae and placed E. affinis as the most divergent lineage among the species analyzed. These findings expand the mitogenomic resources available for Elopidae and provide new insights into the systematics, phylogeny, molecular evolution, biogeography, population genetics, and conservation of this group.Acesso AbertoElopiformesEspécies cripticasFilogenia molecularGenoma mitocondrialMitogenomaElopiformesCryptic speciesMolecular phylogenyMitochondrial genomeMitogenomeCNPQ::CIENCIAS BIOLOGICAS::GENETICA::GENETICA MOLECULAR E DE MICROORGANISMOSTrabalho de Curso - Graduação - MonografiaAttribution-NonCommercial-NoDerivs 3.0 Brazil