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Exploring mtDNA Databases to Evaluate the Population Structure and Genetic Diversity of Tursiops truncatus in the Atlantic Ocean
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Orientador(es)
Resumo(s)
Inshore and offshore bottlenose dolphin, Tursiops truncatus, ecotypes were distinguished through genetics, distribution, diet, morphology, diversity, and social behaviors. Although T. truncatus is a widely studied species, few studies have focused on offshore populations. Offshore biodiversity is frequently neglected due to the difficulty of data collection, and therefore, it is challenging to assess how threatened these populations are. A small, offshore population of dolphins residing around the Saint Peter Saint Paul Archipelago (SPSPA) in the middle of the Atlantic Ocean has been monitored for several years, and a decrease in the number of dolphin sightings has recently been noticed. We analyzed a comprehensive mtDNA control-region sequence dataset for this species to infer the conservation status and better understand the relationships between the SPSPA population and other offshore populations. We assessed the genetic diversity and population structure of the bottlenose dolphin from inshore and offshore populations of the Atlantic Ocean. Offshore populations are more genetically diverse and have less variation between populations than inshore populations. The offshore populations share haplotypes, indicating potential gene flow. However, the SPSPA population presented the lowest levels of genetic diversity between populations. The conservation status of the SPSPA population is concerning, and it is necessary to apply effective management strategies to guarantee its protection.
Descrição
Funding Information: We would also like to thank Dra In\u00EAs Carvalho for her comments, which notably improved the manuscript. The Federal University of RioGrande do Sul (UFRGS)supported this work.We would like to thank the Brazilian Agency of the Coordination for Improvement of Higher Education Personnel (CAPES); the National Council for Scientific and Technological Development (CNPq), and the Research Support Foundation of the State of Rio Grande do Sul (FAPERGS). Funding Information: This research was funded by Conselho Nacional de Desenvolvimento Cient\u00EDfico e Tecnol\u00F3gico (CNPq), grant number 44325/2019-0, CNPq PhD fellowship 140281/2020-7. Publisher Copyright: © 2024 by the authors.
Palavras-chave
conservation genetics mtDNA control region offshore populations Tursiops truncatus Ecology, Evolution, Behavior and Systematics Biochemistry, Genetics and Molecular Biology (miscellaneous) Ecology