2025-07-092025-07-092016-02-19OLIVEIRA, Cintia Negrão de. Utilização da ferramenta de DNA Barcoding sugere espécie críptica dentro da raia criticamente ameaçada Aetobatus narinari Euphrasen, 1790 no atlântico sul ocidental. Orientador: João Bráullio de Luna Sales. 2016. 33 f. Trabalho de Curso (Licenciatura em Ciências Naturais) – Faculdade de Ciências Naturais, Campus Universitário de Breves, Universidade Federal do Pará, Breves, 2016. Disponível em: https://bdm.ufpa.br/handle/prefix/8364. Acesso em: .https://bdm.ufpa.br/handle/prefix/8364Elasmobranch (cartilaginous fish) are included in the group of the oldest vertebrates that exist in the fossil record dating of 350-400 million years ago, inserted into the class Chondrichthyes, which is divided into two subclasses: Elasmobranchii (Sharks and Skates) and Holocephalii (Chimera), currently have about 1,100 species. The genus Aetobatus its composed of at least four nominal species including Aetobatus narinari is the most important within the genus due to the fact that it have a global distribution around the world. In recent years, molecular and morphological studies have confirmed the presence of cryptic species within the genus Aetobatus is composed of at least four nominal species including Aetobatus narinari witch is the most important species given the fact of your worldwide distribution. Recent studies confirms the presence of cryptic genetic species inside the Aetobatus narinari however, the fauna of the Southwestern Atlantic Ocean has not been yet subject of morphological or molecular investigations. This study aims to test the efficiency of DNA barcoding tool in identifying A. narinari specimens sold processed in fish markets in Bragança, and Valença city, popular knowning as spotted rays. The results indicate that samples from Bragança and Valencia, are genetically identical from individuals belonging to Florida, Belize and Cayman, and confirms the formation of various subgroups along the sequences used in this study. In addition, the results also indicate that sequences from individuals in the state of São Paulo, are genetically very distant from all other sequences used in this study, indicating the possible presence of cryptic species within A. narinari in the Southwestern Atlantic Ocean. More molecular and morphological studies are needed to try to elucidate how many species actually exist within A. narinari and if there are still sub- population throughout its range in the region of the southwestern Atlantic.Acesso AbertoElasmobrânquiosAetobatus narinariDNA barcodingEspécie CrípticaArraia PintadaElasmobranchCryptic SpeciesSpotted RaysCNPQ::CIENCIAS BIOLOGICAS::GENETICA::GENETICA ANIMALTrabalho de Curso - Graduação - MonografiaAttribution-NonCommercial-NoDerivs 3.0 Brazil