[MARMAM] New Review Paper - bottlenose dolphins of Argentina

Els Vermeulen elsvermeulen5 at gmail.com
Sat Mar 3 08:35:30 PST 2018

Dear colleagues,

On behalf of all co-authors, I am pleased to inform you on the publication
of a review paper concerning the bottlenose dolphins in Argentina.

Vermeulen, E., Bastida, R., Berninsone, L.G., Bordino, P., Failla, M.,
Fruet, P., Harris, G., Iniguez, M., Marchesi, M.C., Petracci, P., Reyes,
L., Sironi, M., Brager, S. (2017) A review on the distribution, abundance,
residency, survival and population structure of coastal bottlenose dolphins
in Argentina. Latin American Journal of Aquatic Mammals 12: 2-16.

Although bottlenose dolphins Tursiops truncatus are among the most common
delphinid species, global population trends remain poorly understood. To
improve the knowledge of the species in the Southwest Atlantic Ocean, this
paper reviews all available data related to the distribution and
occurrence, abundance, residency and ranging patterns, group size and
composition, survival and reproduction and population structure of the
coastal bottlenose dolphin in Argentina. Most information proved to be
scattered in time and space. Based on the available data, total abundance
of coastal bottlenose dolphins in Argentina appears to be low. Data show
sightings decreased notably since the 1990s in the northern province of
Buenos Aires and the province of Chubut, with the species having
disappeared completely from the former region. Data also indicated that two
genetically and morphologically distinct coastal populations occur in
Argentinean coastal waters, with a sympatric distribution in the provinces
of Río Negro and Chubut. One is an isolated ‘Evolutionary Significant Unit’
within the larger Southwest Atlantic, whereas the other population appears
to be genetically related to the Southwest Atlantic offshore ecotype. 3 In
the absence of more substantial data, the present information is pertinent
to our scientific knowledge of the species in the country, collating all
published information as well as information from grey literature and
previously unpublished data. However, the available information appears to
remain insufficient to explain the apparent decline in sightings and to
assess the remaining abundance nationwide accurately. Therefore, we
strongly recommend increased research efforts for an in-depth assessment of
the species’ population status in Argentina.

This paper is available at
http://lajamjournal.org/index.php/lajam/article/view/457/pdf or upon
request to elsvermeulen5 at gmail.com

Kind regards,


Els Vermeulen, PhD
Research Manager and Post-doctoral research fellow
Mammal Research Institute Whale Unit
Department of Zoology and Entomology
University of Pretoria, South Africa

Co-founding director Whalefish -www.whalefish.org
PI Sea Search - www.seasearch.co.za

Cell: +27 (0)60 9714301Ve
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