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SOWER: THE 2009/10 CRUISE
18/02/2010 - see Press Release
SOWER cruises have been conducted annually for over 30 years and have
provided extensive information on a variety of cetaceans. Commencing in
1978/79 as part of its International Decade of Cetacean Research (IDCR), this
programme has been organised annually under the auspices of the IWC. In the
intervening 32 years the cruise programme has involved between 1 and 4 ships
each year, for a total of 4,112 vessel-days (or 11¼ vessel-years) and has
covered an estimated 216,000 n.miles in the area south of 60°S. In the process,
the Antarctic continent has been circumnavigated 3 times and 43,000 sightings of
cetaceans made, including notably 25,333 of minke whales and 400 of blue whales.
Estimates of abundance have been obtained not only for the Antarctic minke
whale, the prime objective of the programme, but also for almost every other
cetacean occurring in higher latitudes, including several smaller species that
had never been assessed previously.
The first circumpolar survey took place when commercial whaling was still in
progress, and 2,748 minke whales were tagged with Discovery marks and 95
recovered, including one 24 years later: this continues to be the only source of
data on the summer movements of Antarctic minke whales. From the second
circumpolar series onwards, some 1,500 biopsies have been collected, over 3,000
whales photographed for individual identification and many thousands of hours of
acoustic recordings made. The programme has also stimulated the development of
different approaches to modelling sighting data. Without the generous provision
of vessels by the Government of Japan (and initially by the Soviet Union) and
the financial and other support of the IWC, the success of this programme would
never have been possible. It has been truly international in nature, with over
200 scientists from 15 member nations participating, and cooperative cruises in
lower latitudes have been conducted off Australia, Brazil, Chile, Madagascar,
Peru and South Africa. All the data collected on these cruises have been
submitted to the IWC Secretariat and made available through its DESS data base
to interested scientists from any member nation.
Although the programme may now be coming to an end, the IWC Scientific
Committee will doubtless continue to mine the wealth of information it has
accumulated on southern cetaceans for many years to come.
A slideshow of images from previous cruises can be viewed HERE
The most recent cruise took place from December 2008 to February 2009. Detailed
information may be found below:
Some reports from previous cruises can be found below and this list will be
expanded shortly.
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