66 | Chapter 4
in successive winters. That species is Cory’s Shearwater, whose nesting
stations in the North Atlantic include the Azores and the Canaries.
From both, some shearwaters spend the non- breeding (northern) winter
period off southern Brazil, whilst others head similarly far south and
winter off South Africa, either in the Benguela Current west of the coun-
try or ‘round the corner’ east of the Cape of Good Hope in the Agulhas
Current. And, finally, a minority of these shearwaters do not even cross
the Equator; they winter in the Canaries Current.^17 What links these
very separate wintering areas is that all are characterised by nutrient-
rich water upwelling from depth to foster planktonic growth which,
eventually, translates into shearwater food such as fish and crustacea.
The Atlantic Ocean showing the various wintering areas (grey shading)
occupied by Cory’s Shearwaters breeding on the Salvage Islands (star).
Reproduced with permission of The Royal Society,
from the work cited in Note 18, Chapter 4.80º W460º W 0º W20º W0º 20º E 40º E 60º E60º N
0 º40º N
20º N
20º N
40º N
60º N
central
South Atlantic
Brazilian
currentBenguela
currentnorthwest
Atlantic Canary
currentAgulhas
current