234 U.S. BUREAU OF FISHERIES 



this material was obtained for 1932, except that made available 

 through the canned fishery products and by-products, and packaged 

 fish products surveys. 



Packaged-fish trade. — Complete statistics of the annual production 

 and value of fish packaged in the United States are obtained as a part 

 of the survey for statistics of the canned fishery products and by- 

 products industries. These statistics are published in bulletin form 

 annually. 



Cold-storage holdings of fish. — An arrangement has been made with 

 the Bureau of Agricultural Economics, Department of Agriculture 

 whereby statistics of the cold-storage holdings of the various species 

 of fish, by sections of the United States, are furnished to this Bureau 

 monthly. Included with statistics of the holdings are statements of 

 the quantity of the various species of fish frozen and also the hold- 

 ings of certain cured fish. Bulletins showing these statistics are issued 

 monthly as well as annually. 



Foreign fishery trade. — Statistics on the foreign fishery trade are 

 obtained from compilations made by the Bureau of Foreign and 

 Domestic Commerce. Statistics of all known fishery products im- 

 ported or exported are assembled in one table and published annually 

 in the report of this Division. 



COMPILATION PRACTICES AND TERMS 



Certain practices and terms of importance used in the compilation 

 of fishery statistics are explained below. 



Days absent. — In computing "days absent" for vessels landing fares 

 at the various ports, the day of departure and the day of arrival are 

 included; thus, a vessel leaving port on the 8th of the month and re- 

 turning on the 15th of the month will be shown as being absent 8 days. 



Operating units. — Operating units as referred to in this document 

 include persons engaged and fishing craft and gear employed. 



Vessel. — The term "vessel" refers to a craft having a capacity of 

 5 net tons or more. 



Boat. — The term "boat" refers to a craft having a capacity of less 

 than 5 net tons capacity. 



Incidental catch. — The term "incidental catch" refers to the catch 

 of certain species by a type of gear which ordinarily does not take 

 appreciable amounts, if any, of such species. 



Percentages. — Percentages are usually shown as whole numbers. 

 Fractions of percents are dropped if less than five tenths, and the 

 percentage is raised to the next higher integer if the fraction is greater 

 than five tenths. If the fraction is exactly five tenths, the integer is 

 raised or lowered to make it an even number. 



Converting. — Many of the figures shown in the statistical tables 

 published herewith have been reduced to thousands of pounds or dol- 

 lars. In making these conversions the largest number from which a 

 group of items is computed is raised or lowered to the nearest thou- 

 sands place. If the number ends in an even 500, the thousands inte- 

 ger is raised or lowered to make it an even number. The individual 

 items are changed to conform to the total thus obtained. 



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