Vol. 53 - Alaska Resources Library and Information Services

Gulf of Maine were found to move into shallower water as eggs developed
(Haynes and Wigley 1969).
Pribilof populations affected by winter
cooling migrate 30-40 miles toward the outer shelf from 85-100 m depths
to 95-120 m depths where temperature is warmer and more stable (Ivanov
1969).
Predators:
Principal predators include many commercial fish species:
Pacific cod, white pollock (Feder 1978), sand sole (Miller 1967), silver
and white hake, halibut and dogfish (Butler 1980).
Grey and humpback
whales, marine birds (NPFMC 1978) and harbor seals (Lowry et al. 1978)
also prey on pandalid shrimp.
Competitors for the same habitat include Pandalus tridens and Eualus
macilentus.
It was theorized in "A Review of the First Northern Hemisphere
Pandalid Shrimp Workshop" held in Kodiak, Alaska (Frady 1981),
that after depletion by commercial fisheries (i.e., Japanese overfishing
the Pribilof area stocks 1961-63) or by predators, P. borealis shrimp
stocks may have been replaced by other competitor species of fish and
shrimp.
6.2.2 Commercial Fishery
Historically the southeastern Bering Sea fishery has been dominated
by Japan and the USSR.
After catches of Japanese flounder trawlers indicated
large populations of P. borealis in 1960, the Japanese targeted on
shrimp stocks northwest of the Pribilof Islands and in 1961 took 14,000
metric tons (MT).
Catches peaked in 1963 at 30,000 MT and declined thereafter
until the area was abandoned in 1969 (NPFMC 1978).
Overfishing of
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