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?

  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},
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… 

Phylogenetic identification and population differentiation of bottlenose dolphins (Tursiops spp.) in Melanesia, as revealed by mitochondrial DNA

This work attempts to clarify the phylogenetic identity of two distinct forms of bottlenose dolphins described in the Melanesian region of the Pacific Ocean, andalyses of population diversity reveal high levels of regional population structuring among the two forms, with contrasting levels of diversity.

High genetic differentiation of Indo‐Pacific humpback dolphins (Sousa chinensis) along the Asian Coast of the Pacific Ocean

The results indicated the strong genetic structure in S. chinensis populations is a result of geographic distances, and other factors such as environmental variables, anthropogenic interference, and social behavior may also have contributed to population differentiation.

Cryptic lineage differentiation among Indo-Pacific bottlenose dolphins (Tursiops aduncus) in the northwest Indian Ocean.

Taxonomic revision of the humpback dolphins ( Sousa spp.), and description of a new species from Australia

A review of multiple lines of evidence from skeletal morphology, external morphology, coloration, molecular genetics, and biogeography, in combination provides strong support for the recognition of four species of Sousa, including S. teuszii, a species with uniform gray coloration and a prominent dorsal hump.

Low mitochondrial genetic diversity in the Indian Ocean humpback dolphin Sousa plumbea in South African waters

The Indian Ocean humpback dolphin Sousa plumbea has been described as South Africa’s most endangered marine mammal due to its low abundance, reliance on coastal habitats with increasing anthropogenic

Genomics of Population Differentiation in Humpback Dolphins, Sousa spp. in the Indo-Pacific Ocean.

It is suggested that the high level of differentiation found, even across geographically close areas, is likely determined by different oceanographic features such as sea surface temperature and primary productivity.

Cranial variation in common dolphins Delphinus spp. off South Africa, with the inclusion of information from the holotype of Delphinus capensis

There was a substantial difference between the composition of the dorsal-aspect and ventral- aspect clusters, suggesting the presence of only one species in South African waters.

Phylogeography and population structure in highly mobile marine taxa in the western Indian Ocean : bottlenose dolphins (Tursiops spp.) and common dolphins (Delphinus sp.)

  • H. Gray
  • Biology, Environmental Science
  • 2016
Traditional and geometric morphometric techniques were used to investigate congruency between genetic and phenotypic differentiation of three BND lineages in the northwest IO, and strong differences were exhibited in morphology between common BNDs, T. truncatus, and T. aduncus.



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

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

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

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

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

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

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

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.)

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

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.