Integrating multiple lines of evidence to better understand the evolutionary divergence of humpback dolphins along their entire distribution range: a new dolphin species in Australian waters?

@article{Mendez2013IntegratingML,
  title={Integrating multiple lines of evidence to better understand the evolutionary divergence of humpback dolphins along their entire distribution range: a new dolphin species in Australian waters?},
  author={Mart{\'i}n Mendez and Thomas A Jefferson and Sergios-Orestis Kolokotronis and Michael Kr{\"u}tzen and Guido J Parra and Tim Collins and G Minton and Robert L. Baldwin and Per Berggren and Anna S{\"a}rnblad and Omar A. Amir and Victor M. Peddemors and Leszek Karczmarski and Almeida Guissamulo and Brian D. Smith and Dipani Sutaria and George D. Amato and Howard C. Rosenbaum},
  journal={Molecular Ecology},
  year={2013},
  volume={22}
}
The conservation of humpback dolphins, distributed in coastal waters of the Indo‐West Pacific and eastern Atlantic Oceans, has been hindered by a lack of understanding about the number of species in the genus (Sousa) and their population structure. To address this issue, we present a combined analysis of genetic and morphologic data collected from beach‐cast, remote‐biopsied and museum specimens from throughout the known Sousa range. We extracted genetic sequence data from 235 samples from… 

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...

References

SHOWING 1-10 OF 89 REFERENCES

Multiple lines of evidence for an Australasian geographic boundary in the Indo-Pacific humpback dolphin (Sousa chinensis): population or species divergence?

TLDR
Using phylogenetic analyses of 1,082 bp of mitochondrial and 1,916 BP of nuclear DNA, multiple lines of genetic evidence are provided for the genetic distinction of S. chinensis in China and Indonesia from S.chinensis in Australia.

World‐wide genetic differentiation of Eubalaena: questioning the number of right whale species

TLDR
Diagnostic characters, as well as phylogenetic and phylogeographic analyses, support the possibility that three distinct maternal lineages exist in right whales, with North Pacific E. glacialis being more closely related to E. australis than to North Atlantic E.glacialis.

Phylogeography, population structure and dispersal patterns of the beluga whale Delphinapterus leucas in the western Nearctic revealed by mitochondrial DNA

TLDR
The patterns of mtDNA variation in beluga whales indicated that the summering concentrations are demographically, if not phyletically distinct, while asymmetries in dispersal may be associated with the type of mating system.

The phylogeography of dusky dolphins (Lagenorhynchus obscurus): a critical examination of network methods and rooting procedures

TLDR
The present study indicates that the dusky and the Pacific white‐sided dolphins are sister species and not only the Westwind Drift hypothesis but also other models of dispersion are compatible with the current geographical distribution of dusky dolphins.

Molecular ecology meets remote sensing: environmental drivers to population structure of humpback dolphins in the Western Indian Ocean

TLDR
High-coverage and high-resolution oceanographic and genetic sequence data are used to assess population structure patterns and their potential environmental influences for humpback dolphins in the Western Indian Ocean to address questions not only pertaining to genetic population structure, but also to relevant ecological processes in marine species.

Population differentiation of the Atlantic spotted dolphin (Stenella frontalis) in the western North Atlantic, including the Gulf of Mexico

TLDR
Genetic evidence for population differentiation coupled to known biogeographic transition zones at Cape Hatteras, North Carolina and Cape Canaveral, Florida, USA, evidence of female philopatry, and preliminary support for significant genetic differences between previously documented morphotypes of Atlantic spotted dolphins in coastal and offshore waters all indicate that the biology and life history of this species is more complex than previously assumed.

A New Dolphin Species, the Burrunan Dolphin Tursiops australis sp. nov., Endemic to Southern Australian Coastal Waters

TLDR
It is demonstrated that the syntype material of T. maugeanus comprises two different species, one of which is the historical ‘southern form of Tursiops’ most similar to T. truncatus, and the other is representative of the new species and requires formal classification.

Geographic Variation in Skull Morphology of Humpback Dolphins (Sousa spp.)

TLDR
The taxonomy and systematic relationships of humpback dolphins (genus Sousa) are highly confused, and patterns of cranial variation appeared to be relatively conservative, but other taxonomic decisions should await further studies of molecular genetics and morphometrics, currently underway.

Isolation by environmental distance in mobile marine species: molecular ecology of franciscana dolphins at their southern range

TLDR
Combined evidence of genetic and environmental structure suggests that isolation by distance and a process here termed isolation by environmental distance can explain the observed correlations.
...