FISHERY BULLETIN: VOL. 82, NO. 2 



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FIGURE 10. — Echo sounder (Krupp-Atlas Elektronik Model 611, 33 kHz) transect across Heceta Bank showing characteristic rough 

 topography and schools offish in the water column. The larger signal at the extreme right (arrow) is believed to be a large concentration 

 of forage fish, possibly myctophids. The bottom section of the figure shows an expanded version of the layer just above the seabed. 



tion and digestion rates as the other species 

 studied. Skalkin (1964) found that the feeding 

 intensity of immature S. alutus in the Bering Sea 

 was highest around midday with a smaller peak 

 shortly after dusk as found for S. pinniger and S. 

 flavidus in this study He also hypothesized that 

 larger fish may feed higher in the water column at 



night on euphausiids, but his nighttime sampling 

 was also limited. Similar pelagic feeding by S. 

 alutus at night may be occurring in our study area, 

 but these fish would not be available to bottom 

 trawls at this time. 



The rockfishes considered here are just a few 

 species in an extensive guild (sensu Root 1967) 



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