Downing. — Production and Destruction 



29 



At The U. S. Station. 



This shows a total production of all kinds of fish at this station 

 during this period to have been 4,310,551,000, or an average of 

 nearly 270,000,000 for each of the sixteen years considered. 



During the same period the Ohio State hatchery produced 

 and liberated in the same waters, 642,000,000 whitefish, 1,194,- 

 000,000 herring; 558,000,000 pike-perch; 10,000,000 perch and 

 6,000,000 saugers, a total of 2,410,000,000. 



The fish produced by fish cultural work in this one vicinity 

 in sixteen years has been as follows: Whitefish, 2,983,767,000; 

 herring, 1,404,310,000; pike-perch, 2,298,767,000; perch, 23,000,- 

 000; lake trout, 6,707,000, and saugers, 6,000,000; making a grand 

 total of 6,722,551,000 fry produced by the two stations. This 

 number added to the natural production resulting from the eggs 

 deposited by the fish themselves upon the natural breeding 

 grounds, gives us the production of that part of Lake Erie upon 

 which the fish cultural work under consideration was conducted, 

 and there can also be added to the lake at large the product of 

 the Pennsylvania State hatchery at Erie, and that of the hatchery 

 conducted by the Canadian Government. 



