PROGEESS IN BIOLOGICAL INQUIEIES, 19 2 7 



203 



The following progress reports, covering the more important in- 

 vestigations conducted b;^ the division during the calendar year 1927, 

 were prepared in the main by the investigators. 



ATLANTIC AND GULF COAST INVESTIGATIONS 

 COD, POLLOCK, AND HADDOCK 



The investigation dealing with the habits of the cod, pollock, and 

 haddock was continued by means of tagging experiments throughout 

 1927. The total number of fish tagged was 11,028. A statistical sum- 

 mary of operations up to the present time is given in the following 

 tables : 



CoA, pollock, and haddock tagged from 1923 to 1927 



Number of cruises 



Days of actual fishing 



Hours of actual fishing 



Number of cod tagged -- 



Number of pollock tagged 



Number of haddock tagged — 



Total number of fish tagged — 



Number of fish recaptured up to Dec. 31, 1927 



Total 



47 



257 



1, 710. 2 



36, 663 



4,532 



9,930 



51, 125 



2,227 



Catch of tagged fish, according to localities 



In addition to the 2,227 fish with tags that were recaptured, 108 

 with tag " marks " were taken by the vessels Halcyon and Albatross 

 II. These latter fish had lost their tags but showed unmistakable 

 evidence of having been tagged. A summary of all fish recaptured 

 is given in the following table : 



Bummary of recaptured fish reported up to December 31, 1927 



