112 



U. S. BUREAU OF FISHERIES. 



large streams and lakes where it was found difficult to determine whether the 

 fish furnishetl by the bureau had actually produced results, owing to the fact 

 that the waters had been previously stocked with the same species. Poor 

 covers reports that indicate that the plants were a failure. Failures are 

 attributed to a number of causes, as follows : Unsuitability of the waters, poor 

 condition of the fish when received, destruction of the fish by snakes and other 

 predatory animals. Many failures are attributed to the severe winter of 1916 

 and 1917, when ponds froze to an unprecedented depth. In some instances the 

 fish were stolen. 



DETAILED RESUL.TS FOR 1916 AND 1917. 



The following table shows the detailed results of fish planting 

 during the fiscal years 1916 and 1917, based on 4,589 reports received 

 from individuals and organizations. This table does not cover ship- 

 ments of fish made to agents of the United States Forestry Service. 

 To economize space no tabular statement is presented for the period 

 from 1899 to 1915. The preceding table, however, for the years 

 1916 and 1917 is fairly representative of the bureau's normal activi- 

 ties. 



Results of fish planting during fiscal years 1916 and 1917, shown by States 



and species, 



[For explanation of headings see p. 111.] 



