November 1966 



COMMERCIAL FISHERIES REVIEW 



13 



rus) , rougheye rockfish (_S. aleutianus ), idiot 

 rockfish (Sebastolobus alascanus ). 



Legend 



■ Area surveyed. 

 Bottom drags. 

 100 -fathom cuive. \ \ 



Fig. 3 - SoutJiem area of operation. 



For more information, contact: Base Di- 

 rector, Exploratory Fishing and Gear Re- 

 search Base, Bureau of Commercial Fish- 

 eries, P. O. Box 1668, Juneau, Alaska 99801, 

 Phone: 586-7233. 



Caribbean and Tropical Atlantic 

 Fisheries Exploration 



The George M. Bowers continued testing 

 the efficiency of the electrical shrimp trawl 

 in the Texas shrimping area. Daytime catches 

 with the electrical trawl are about equal to 

 nighttime catches with the standard trawl. 



^^'^f^^ 



Great Lakes Fisheries Investigations 



KAHO CONFIRMS PRESENCE OF 

 INDUSTRIAL FISH IN LAKE HURON 



Trawl fishing by the research vessel Kaho 

 in a recent survey of the Saginaw Bay area of 

 Lake Huron confirmed the presence of indus- 

 trial fish. The 25 -day exploratory cruise 

 ended Sept. 15. A previous cruise (#34, which 

 ended Aug. 11) had revealed alewife and carp 

 populations large enough to support an in- 

 dustrial type fishery for the production of 

 fish meal, pet food, and mink food. The aver- 

 age catch throughout Saginaw Bay was 300 

 pounds per half -hour drag and, in the south- 

 ern end of the Bay, over 580 pounds. Catch 

 rates of 250 or more pounds with the small 

 sampling net used are considered commer- 

 cially significant even for the low -value spe- 

 cies taken. Occurrence of these fish stocks 

 in Lake Huron may encourage the emerging 

 Lake Michigan industrial fishery to expand 

 its operations. 



For more information, contact: Base 

 Director, Exploratory Fishing Base, BCF, 

 5 Research Drive, Ann Arbor, Mich. 48103. 



Inland Fisheries Explorations 

 and Gear Development 



HIODON EXPLORES OAHE RESERVOIR 



An August exploratory and gear testing 

 cruise in the Oahe Reservoir, on the Missou- 

 ri River in South and North Dakota, produced 

 only fair results. Drags were made for the 

 purpose of comparing catches made by the 

 trawls used, to collect biological data, and to 

 explore new trawling areas. Also, 12 repe- 

 titive drags were made in a small bay over 

 a 19 -hour period to determine changes in 

 catch. The average catch per drag for the 

 entire cruise was 95 pounds. The central 

 reservoir section produced 150 pounds per 

 drag, and the upper and lower extremes prod- 

 uced only 55 pounds per drag. Percentage 

 composition of the catch by weight was: 

 carp--65; Buffalofish--8; carpsucker--8; 

 drum--2; channel catfish--2; Northern pike, 

 sauger, walleye, and perch combined made up 

 the rest. This catch composition compares 

 with those of previous cruises this year and 

 last. 



