Big GOALS Accomplished: Surveying for Cetaceans in the Gulf of Alaska: Tables 1 and 2
Table 1. Estimates of density (individuals/km2) and CV (in parenthesis) for blue, fin, and humpback whales after pro-rating the abundance of unidentified large whales. Estimates were not corrected for the proportion of animals missed on the trackline.
Species
Stratum
Total
Inshore
Offshore
Seamount
Slope
Blue whale
0.002 (1.22)
0.001 (1.22)
Fin whale
0.071 (0.49)
0.021 (0.27)
0.005 (0.39)
0.014 (0.21)
0.022 (0.28)
Humpback whale
0.129 (0.74)
0.001 (0.76)
0.001 (0.64)
0.000 (1.03)
0.019 (0.71)
Sperm whale - visual
0.001 (1.09)
0.007 (0.58)
0.002 (0.57)
Sperm whale - acoustic
0.001 (0.36)
0.000 (0.55)
0.003 (0.18)
0.001 (0.18)
Killer whale
0.005 (0.60)
0.002 (0.77)
0.020 (1.93)
0.006 (0.73)
Dall’s porpoise1
0.214 (0.50)
0.028 (0.52)
0.011 (0.41)
0.133 (0.36)
0.072 (0.28)
1Dall’s porpoise estimates assume no responsive movement occurred prior to detection, an assumption often violated as this species tends to approach the vessel for bow riding.
Table 2. Estimates of abundance (individuals) and CV (in parenthesis) for blue, fin, and humpback whales after pro-rating the abundance of unidentified large whales. Estimates were not corrected for the proportion of animals missed on the trackline.
Species
Stratum
Total
Inshore
Offshore
Seamount
Slope
Blue whale
78 (1.22)
78 (1.22)
Fin whale
1,610 (0.49)
1,265 (0.27)
207 (0.39)
499 (0.21)
3,581 (0.28)
Humpback whale
2,927(0.74)
65 (0.76)
53 (0.64)
9 (1.03)
3,054 (0.71)
Sperm whale - visual
31 (1.09)
265 (0.58)
296 (0.57)
Sperm whale - acoustic
78 (0.36)
16 (0.55)
121 (0.18)
215 (0.18)
Killer whale
117 (0.60)
107 (0.77)
726 (1.93)
950 (0.73)
Dall’s porpoise1
4,873 (0.50)
1,658 (0.52)
486 (0.41)
4,907 (0.36)
11,924 (0.28)
1Dall’s porpoise estimates assume no responsive movement occurred prior to detection, an assumption often violated as this species tends to approach the vessel for bow riding.
