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Seascape genetics of the Atlantic spotted dolphin (Stenella frontalis) based on mitochondrial DNA

Citation

do Amaral, Karina Bohrer et al. (2021), Seascape genetics of the Atlantic spotted dolphin (Stenella frontalis) based on mitochondrial DNA, Dryad, Dataset, https://doi.org/10.5061/dryad.cvdncjt50

Abstract

The Atlantic spotted dolphin (Stenella frontalis) is endemic to tropical, subtropical, and warm temperate waters of the Atlantic Ocean. Throughout its distribution, both geographic distance and environmental variation may contribute to population structure of the species. In this study we follow a seascape genetics approach to investigate population differentiation of Atlantic spotted dolphins based on a large worldwide dataset and the relationship with marine environmental variables. The results revealed that the Atlantic spotted dolphin exhibits population genetic structure across its distribution based on mitochondrial DNA control region (mtDNA-CR) data. Analyses based on the contemporary landscape suggested, at both the individual and population-level, that the population genetic structure is consistent with the isolation-by-distance model. However, because geography and environmental matrices were correlated, and because in some, but not all analyses, we found a significant effect for the environment, we cannot rule out the addition contribution of environmental factors in structuring genetic variation. Future analyses based on nuclear data are needed to evaluate whether local processes, such as social structure and some level of philopatry within populations, may be contributing to the associations among genetic structure, geographic, and environmental distance.

Funding

Conselho Nacional de Desenvolvimento Científico e Tecnológico, Award: 557182/2009-3

Conselho Nacional de Desenvolvimento Científico e Tecnológico, Award: 404558/2012-7

Conselho Nacional de Desenvolvimento Científico e Tecnológico, Award: 422507/2016-4

Pró-Reitoria de Pesquisa, Universidade Federal do Rio Grande do Sul

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Award: 1395438

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Award: 88881.132895/2016-01

Society for Marine Mammalogy

Rufford Foundation

Universidad de los Andes

Fundação de Amparo à Pesquisa do Estado de São Paulo, Award: 010/51323-6

Fundação de Amparo à Pesquisa do Estado de São Paulo, Award: 2011/51543-9