4.2 Article

Population structure, phylogeography, and genetic diversity of the common bottlenose dolphin in the tropical and subtropical southwestern Atlantic Ocean

期刊

JOURNAL OF MAMMALOGY
卷 100, 期 2, 页码 564-577

出版社

OXFORD UNIV PRESS INC
DOI: 10.1093/jmammal/gyz065

关键词

biological conservation; Brazilian coast; cetaceans; ecotypes; genetic diversity; microsatellites; mtDNA

类别

资金

  1. Secretaria da Comissao Interministerial para os Recursos do Mar - SECIRM
  2. Conselho Nacional de Desenvolvimento Cientifico e Tecnologico - CNPq [480037/2004-3, 572180/2008-0, 557176-2009-3, 308996/2017-8]
  3. Gerencia de Avaliacao e Monitoramento Ambiental do CENPES/PETROBRAS
  4. Shell Brasil S.A. as part of Project Monitoring Whales with Satellite Telemetry (Projeto Monitoramento de Baleias por Satelite)
  5. CNPq [GM 130969/2014-1, 151307/2005-9, 303813/2011-3, 308650/2014-0, 310621/2017-8]
  6. FAPERGS
  7. Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]

向作者/读者索取更多资源

We assessed the level of genetic variability and population structure of the common bottlenose dolphin (Tursiops truncatus) in the tropical and subtropical portions of the southwestern Atlantic Ocean and compared the results with previous morphological findings. We analyzed 109 samples of common bottlenose dolphins that were sequenced for control region mtDNA and genotyped for seven polymorphic microsatellite loci. The results suggested that the species in this region can be separated in two major biological units, northern and southern, with an area of parapatry at southern Brazil. The northern unit seems to occur in a wide range of depths, including offshore waters, is consistent with the canonical morphology of T. truncatus, and can be divided into three management units: 1) Saint Paul's Rocks, 2) north and northeast of Brazil, and 3) Campos and Santos Basins (that extend at least to southernmost Brazil). The southern unit is coastal, occurring exclusively in very shallow waters (< 10 m) and estuaries, and is consistent with the previously described (putative) Tursiops gephyreus. Nevertheless, a formal decision on the taxonomic status of T. gephyreus should wait for a more geographically comprehensive and data-integrative study.

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