16 



MUSEUM BULLETIN NO. 13. 



Tabular Results of the Examination of Thirty-two Cormorants' 

 Stomachs, 1914. (Continued). 



T = traces. S = several . 



In No. 193 the remains could not be accurately determined except that 

 they belonged to either of these species. Two more stomachs were collected 

 but being absolutely empty they were not saved or recorded. 



The fragmentary remains of food in these stomachs made determinations 

 difficult. However, the fine bones of herring and the angular, spinny fin-rays 

 of the sculpin are too characteristic to be easily mistaken. In other cases 

 species could only be recognized by the presence of ear bones (otoliths), in the 

 finely comminuted masses. 



In order that no mistake should be made in recognition of these remains 

 the aid of the Marine and Fisheries Department was solicited. Mr. Andrew 

 Halkett of that department was, therefore, detailed to assist us and he person- 

 ally passed upon all the material here presented. 



SOME GENERAL PRINCIPLES BEARING UPON THE 



ARTIFICIAL PROPAGATION AND INCREASE 



OF SALMON AND OTHER SPECIES. 



As the investigation of the influence of cormorants upon 

 salmon has brought up questions of damage done by other 

 species of birds, it seems well to discuss some general principles 

 that should have consideration in dealing with this and allied 

 subjects. These may seem of a speculative character, but they 

 are really fundamental principles, founded on proven examples 



