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• W2757908406 abstract "Abstract Due to their worldwide distribution and occupancy of different types of environments, bottlenose dolphins display considerable morphological variation. Despite limited understanding about the taxonomic identity of such forms and connectivity among them at global scale, coastal (or inshore) and offshore (or oceanic) ecotypes have been widely recognized in several ocean regions. In the Southwest Atlantic Ocean ( SWA ), however, there are scarce records of bottlenose dolphins differing in external morphology according to habitat preferences that resemble the coastal‐offshore pattern observed elsewhere. The main aim of this study was to analyze the genetic variability, and test for population structure between coastal ( n = 127) and offshore ( n = 45) bottlenose dolphins sampled in the SWA to assess whether their external morphological distinction is consistent with genetic differentiation. We used a combination of mt DNA control region sequences and microsatellite genotypes to infer population structure and levels of genetic diversity. Our results from both molecular marker types were congruent and revealed strong levels of structuring (microsatellites F ST = 0.385, p < .001; mt DNA F ST = 0.183, p < .001; Φ ST = 0.385, p < .001) and much lower genetic diversity in the coastal than the offshore ecotype, supporting patterns found in previous studies elsewhere. Despite the opportunity for gene flow in potential “contact zones”, we found minimal current and historical connectivity between ecotypes, suggesting they are following discrete evolutionary trajectories. Based on our molecular findings, which seem to be consistent with morphological differentiations recently described for bottlenose dolphins in our study area, we recommend recognizing the offshore bottlenose dolphin ecotype as an additional Evolutionarily Significant Unit ( ESU ) in the SWA . Implications of these results for the conservation of bottlenose dolphins in SWA are also discussed." @default.
• W2757908406 created "2017-10-06" @default.
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• W2757908406 date "2017-09-29" @default.
• W2757908406 modified "2023-09-30" @default.
• W2757908406 title "Genetic divergence between two phenotypically distinct bottlenose dolphin ecotypes suggests separate evolutionary trajectories" @default.
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• W2757908406 doi "https://doi.org/10.1002/ece3.3335" @default.
• W2757908406 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5689489" @default.
• W2757908406 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29177038" @default.
• W2757908406 hasPublicationYear "2017" @default.
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