Genetic structure of common bottlenose dolphins (Tursiops truncatus) inhabiting adjacent South Florida estuaries - Biscayne Bay and Florida Bay

Jenny A. Litz, Colin R. Hughes, Lance P. Garrison, Lynne A. Fieber, Patricia E. Rosel

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Coastal common bottlenose dolphins show a variety of migration and residency patterns adding to the difficulty of defining stocks for management purposes. Genetic structure plays an important role in identifying population stocks of dolphins. This study examines genetic differentiation in common bottlenose dolphins both between two social groups occurring in Biscayne Bay, Florida and between Biscayne Bay and an adjacent group of dolphins in Florida Bay. Skin biopsy samples were sequenced at the mitochondrial DNA (mtDNA) control region and genotyped at microsatellite loci. Significant genetic differentiation was found between bottlenose dolphins in Biscayne Bay and Florida Bay (mtDNA FST = 0.139, p ≤ 0.001; microsatellite F ST = 0.042, p ≤ 0.001) supporting independent management stock status for these two populations. Within Biscayne Bay, evidence of weak but significant population differentiation was found between the two social groups using microsatellite markers (FST = 0.0149, p ≤ 0.009); however, differentiation was not evident from the mtDNA-based estimates of FST and ΦST. The lack of differentiation at mtDNA coupled with field observations indicating overlapping home ranges for these two groups suggests ongoing, though perhaps low, levels of interbreeding. These data are insufficient to warrant splitting the Biscayne Bay management stock at this time.

Original languageEnglish (US)
Pages (from-to)107-117
Number of pages11
JournalJournal of Cetacean Research and Management
Volume12
Issue number2
StatePublished - Dec 1 2012

Keywords

  • Atlantic ocean
  • Biopsy sampling
  • Common bottlenose dolphin
  • Genetics
  • North America
  • Site fidelity

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Animal Science and Zoology

Fingerprint Dive into the research topics of 'Genetic structure of common bottlenose dolphins (Tursiops truncatus) inhabiting adjacent South Florida estuaries - Biscayne Bay and Florida Bay'. Together they form a unique fingerprint.

  • Cite this