. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . ⢠1978 Midwater sighting â 1979 Midwater sigtiting t^ Overall apparent range i of Itsti predato Figure 33-16. Observations of 0-group (two- to four- month-old) pollock during June to mid-August, based upon NMFS research surveys during 1978 and 1979. Figure 33-17. Overall apparent range of one-year-old pollock during June to mid-August, based upon NMFS research surveys, 1975-79.

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