[MARMAM] Falkland Islands papers available

heleno at southcom.com.au heleno at southcom.com.au
Sat Jan 12 19:19:27 PST 2013


Dear Colleagues

If you are interested in the South West Atlantic Ocean region,
particularly the Falkland Islands, I now have two papers that describe
cetacean records.  One focuses on beaked whales and the second is a
discussion of the cetacean community.

Helen Otley, John Smith and Merel L. Dalebout (2012). Beaked whale
strandings on the Falkland Islands and South Georgia, South Atlantic
Ocean, between 1866 and 2008. Journal of the Marine Biological Association
of the United Kingdom, 92 1851 – 1864.  doi:10.1017/S0025315411000749

Records of beaked whales stranded in the Falkland Islands and at South
Georgia were collated for the period 1866 to 2008.  Thirty-eight records,
involving at least seven species in four genera, were documented. 
Strap-toothed whales (Mesoplodon layardii Gray, 1865) were the most common
species with 11 records, including two neonates.  Andrew’s beaked whales
(M. bowdoini Andrews, 1908), Arnoux’s beaked whales (Berardius arnuxii
Duvernoy, 1851), Cuvier’s beaked whales (Ziphius cavirostris Gray, 1823),
Gray’s beaked whale (M. grayi van Haast, 1876), Hector’s beaked whales (M.
hectori Gray, 1871) and southern bottlenose whales (Hyperoodon planifrons
Flower, 1882) were recorded on three to five occasions.  In several cases,
records suggested potential temporal changes in range.  For example,
Arnoux’s beaked whale has not been recorded in the Falkland Islands since
1965, whilst Gray’s beaked whale was not recorded prior to 1981, and
Andrew’s beaked whale was not recorded before 1987.  Although the number
of records for each species is low, this could reflect changes in water
temperatures and/or prey availability. Overall, this study confirms that
the Falkland Islands - Tierra del Fuego region is one of the world’s key
areas for beaked whales.

Helen Otley (2012). The composition of the cetacean community in the
Falkland (Malvinas) Islands, southwest South Atlantic Ocean. Revista de
Biología Marina y Oceanografía 47: 537 – 551.

An evaluation of the stranding record for the period 1866 to September
2012 confirms that the Falkland (Malvinas) Islands cetacean community is
composed of 7 species of baleen whale, 7 beaked whale species, sperm
whale, 8 species of dolphin and 1 of porpoise. The stranding record
supports the species composition based on at-sea surveys, but also
confirms the presence of some rare, vessel-shy and/or offshore and
deepwater species. Five species - long-finned pilot whale, Peale’s
dolphin, Commerson’s dolphin, hourglass dolphin and sperm whale - are
considered to have a regular presence in the Islands. Six species are
considered infrequent, 11 are considered rare and 2 species had a historic
presence but have not been recorded in recent years. The stranding record
suggests potential temporal changes for some of these species, reflecting
perhaps a recovery of their population from over-exploitation and/or
changes in oceanographic conditions and/or prey availability.

Please email me if you want a copy.

Cheers
Helen Otley
heleno at southcom.com.au






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