[MARMAM] new paper on highly divergent bottlenose dolphins

Kate Charlton kate.charlton at sci.monash.edu.au
Thu Feb 1 18:42:22 PST 2007


Dear Marmam readers,

The following paper will be published in the Journal of Cetacean 
Research and Management.

A note on divergent mtDNA lineages of bottlenose dolphins from coastal 
waters of southern Australia.
Kate Charlton, Andrea C. Taylor and Stephen W. McKechnie
J. CETACEAN RES. MANAGE. 8(2):173–179, 2006 173
Contact e-mail: kate.charlton at sci.monash.edu.au

ABSTRACT
Bottlenose dolphins have a global distribution throughout tropical and 
temperate waters, both inshore and offshore. Many studies
demonstrate the existence of at least two Tursiops species: Tursiops 
truncatus, consisting of inshore and offshore eco-types and T. aduncus, 
a coastal Indo-Pacific type known to extend south into temperate waters 
down the east coast of Australia. To clarify the taxonomic status of two 
populations (Port Phillip Bay and Gippsland Lakes) of coastal bottlenose 
dolphins along Australia’s south coast (Victoria), a 346bp region of the 
mitochondrial-DNA (mtDNA) control region was sequenced from ten 
individuals and they were incorporated into phylogenetic analyses 
involving published sequences of other Tursiops spp., Stenella spp. and 
Delphinus spp., found worldwide. Both neighbour-joining and maximum 
parsimony trees place Victorian coastal haplotypes in a highly-supported 
group separate to those from the other dolphins, including those from 
the southern part of the Australian eastern coast. Victorian haplotypes 
are least divergent from T. truncatus (average 5.5%) and most divergent 
from T. aduncus (9.1%), with intermediate levels of divergence from 
Stenella and Delphinus spp. These data suggest that the Victorian 
coastal dolphins, similar to other world-wide coastal populations, are 
genetically unique, long isolated and therefore likely to be locally 
adapted. This has important implications for management and conservation.

If you would like a pdf file of this paper, please send a request to:
kate.charlton at sci.monash.edu.au

Best Regards,
Kate Charlton



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