63°Nr 



62°N 



61°N - 



60°N 



59°N 



58°N - 



57°N 



56°N- 



55°N 



54°N 



180° 



178°W 



176°W 



174 °W 



172°W 



170°W 



I68°W 



166°W 



164°W 



162°W 160°W 



158°W 



Figure 4.— Bering Sea "otolith" areas used for collection of age data and other individual specimen data during the 1976 spring trawl survey. 



Table 2.- 



-Vessels participating in the 1976 



Bering 



Sea demersal fish survey. 





Overall 



length 



(m) 



Gross 

 tonnage 



Horse- 

 power 





Survey period 



Vessel 





Start Finish 



Miller Freeman 



65.5 



1,500 



2.200 



Anna Marie 



26.2 



177 



665 



Pal San Marie 



30.0 



200 



765 



Oregon 



30.4 



219 



600 



1 Apr. 1976 31 May 1976 



21 Apr. 1976 13 June 1976 



21 Apr. 1976 20 June 1976 



29 May 1976 9 Aug. 1976 



Standard Procedures at Stations 



Station positions were determined by loran-C, with radar also 



used as a nearshore navigational aid. Some stations where un- 

 trawlable bottom might have been encountered were first 

 surveyed by an echosounder transect to establish the bottom con- 

 dition and to determine a course that would provide the least 

 variation in bottom depth during the tow. For most stations on 

 the continental shelf where the bottom was known to be generally 

 smooth sand and mud, this precaution was not taken. If the echo- 

 sounder record indicated rough bottom, the vessel proceeded on 

 to the next station. 



The trawl was set so that the intended station position was passed 

 midway through the tow. Actual mean towing speeds for the four 

 vessels were Miller Freeman, 6.3 km/h (3.4 kn); Anna Marie, 5.9 



Table 3. — Fishing gear used during the 1976 Bering Sea demersal fish survey. 





Headrope 



Footrope 





Mesh sizes 





Accessory gear 





Wing and 



Inter- 



Cod 



Cod end 



Door ' 



Dandy line 





length 



length 



body 



mediate 



end 



liner 



width & 



length 



Vessel 



(m) 



(m) 



(mm) 



(mm) 



(mm) 



(mm) 



length (m) 



(m) 



Miller Freeman 



25.3 



34.1 



102 



89 



89 



32 



2.1 x 3.0 



65.8 



Anna Marie 



25.3 



34.1 



102 



89 



89 



32 



1.8 x 2.7 



49.4 



Pal San Marie 



25.3 



34.1 



102 



89 



89 



32 



1.8 x 2.7 



49.4 



Oregon 



21.6 



28.7 



102 



89 



89 



32 



1.8 x 2.7 



45.7 



'The weight of an individual door was about 1,000 kg. 



