artificially so they can breed them later for resist- 

 ance to disease and parasites; they are studying the 

 causes of mass deaths, such as occur among oysters 

 some years; they are searching for and finding ways 

 to control predators, such as the drill and starfish; 

 and they are developing new and improved culture 

 methods. 



The results of the Bureau's biological research 

 are the basis for recommending management or con- 

 servation measures to the States and to international 

 commissions for regulations and other actions to 

 ensure conservation compatible with maximum use of 

 the resource. 



Industrial Research 



Industrial research of the Bureau of Commercial 

 Fisheries ranges from exploration for new fishing 

 grounds to technological studies to improve quality 

 and find better ways to utilize the fishery resource. 



Research involving exploratory fishing and gear 

 development is concerned with planning and conducting 

 exploratory fishing programs to locate new fishing 

 grounds and determine their extent and estimate the 

 size and character of the resource. It is also concerned 

 with developing, designing, and testing new and con- 

 ventional types of fishing gear and fishing craft, and 

 demonstrating the most efficient means and methods 

 of operation. 



Three Bureau vessels figured in recent discov- 

 eries: the Delaware found commercial quantities of 

 bluefin tuna in the Gulf Stream areas of the western 

 North Atlantic; the John N. Cobb located commercial 

 quantities of shrimp in central Alaska waters; and the 

 Oregon found at least six species of fish, now little 



ureg< 

 used 



or not used at all, in possible commercial quan- 

 tities in the Gulf of Mexico. 



Through technological research, the Bureau de- 

 velops better and more economical ways of handling 

 and processing fish and shellfish and new ways of 

 using fishery byproducts and seaweed products. 



Technological research on fish oils and fish meals 

 has resulted in some valuable findings. Fatty acids 

 derived from certain fish oils, particularly menhaden, 

 have potential medicinal value. They markedly lower 



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