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COSEWIC Assessment and Update Status Report on the Bowhead Whale in Canada

Appendix 1: Calculation for Extent and Area of Occurrence of Bowheads

Hudson Bay-Foxe Basin Population

Table 1: The Calculation for the Extent of Occurrence and the Area of Occupancy for Bowheads in the Hudson Bay-Foxe Basin Population
PlaceExtent of OccurrenceArea of Occurrence
Length
(km)
Width
(km)
Area
(km2)
Length
(km)
Width
(km)
Area
(km2)
Hudson Bay  59 570a  59 570a
Foxe Basin300400120 00071523 692
Hudson Strait800150120 000800150120 000
Gulf of Boothia35015052 50035015052 500
Total  352 070  235 762

a Ross’s (1974) estimate of the area of the Hudson Bay commercial whaling grounds during the nineteenth century.

Lengths and widths are based on estimated distances from distribution maps.


Davis Strait-Baffin Bay Population

Table 2: The Calculation for the Extent of Occurrence and the Area of Occupancy for Bowheads in the Davis Strait-Baffin Bay Population
PlaceExtent of OccurrenceArea of Occurrence
Length
(km)
Width
(km)
Area
(km2)
Length
(km)
Width
(km)
Area
(km2)
Davis Strait/Baffin Bay2 100322a676 2002 100100b210 000
Lancaster Sound5006532 5005006532 500
Prince Regent Inlet35010035 00035010035 000
Admiralty Inlet150203 000150203 000
Pond Inlet300103 000300103 000
Cumberland Sound2507518 7502507518 750
Frobisher Bay200306 000200306 000
Total  774 450  308 250

a There is movement between Greenland and Baffin Island, so the 200-mile limit is used as the extent of occurrence.

b Most bowheads concentrate within 100 km from shore, so the 100-km width was used as the area of occupancy.

Lengths and widths are based on estimated distances from distribution maps.

 

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