Analysis and Ranking of the Acoustic Disturbance Potential of ...

Table 2.6.
Observed Numbers and Estimated Densities (No./km2) of Selected Marine Hamma1 Species in
the Chukchi Sea, Unimak Pass, and Norton Sound.
Numbers and
Estimated,
Locat ion Season Densities Situation Reference
Chukchi Sea
Gray whales summer, fall (0 to 0.01/km~)~ in offshore waters Ljungblad et al. (1985);
Davis and Thomson ( 1984 )
I0 It II
summer, fall (0.02 to 0.06/km2) in nearshore waters
Walrus summer, fall f 90, 000~ offshore near ice edge, Fay (1982); Davis and
U.S. waters Thomson (1984)
II 11 It It
summer, fall 135, 0002 offshore near ice edge,
11 fl 91 I1
Soviet waters
White whale summer 1500-25002 nearshore and in Davis and Thomson ( 1984)
lagoons
Unimak Pass
Gray whales spring, fall 16,000-17,900~ migrants passing Braham ( 1984 ); Rugh ( 1984 )
Northern fur seal spring, fall 800,000 through Harry and Hartley (1981);
81 I#
Steller sea lion spring, fall ? Lloyd et al. (1981)
II II '~chus terman ( 1981 )
t or ton Sound
Walrus
summer
nearshore off Nome Fay (1982)
'observed densities from aerial surveys.
2~st imated numbers.