LIV REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



the roller process. They commenced to take food on April 8, and were 

 apparently healthy and vigorous until April 17, when a considerable 

 number of dead ones were discovered at the bottom of the tanks. 

 The death rate continued to increase from this time until about the 

 28th, when it had become so large that it was decided to plant half of 

 them. The balance were held for experimental purposes, and various 

 kinds of food were tried, but they all died on the night of May 6. 

 The temperature of the water during this jDeriod was as follows : 



From a consignment of 1,000,000 lake-trout eggs shipped fromNorth- 

 ville Station 794,000 fry were hatched and libeiated in the vicinity of 

 the station, on Korth Bass Island and Peach Point Eeef. 



Another attempt was made to collect black-bass eggs by setting out 

 artificial nests in the vicinity of the hatchery. Over 100 were prepared 

 and placed in shallow places, but owing to the very high winds and low 

 temperature j>revailing during the spawning season only three broods 

 of young fish were hatched. 



In the spring the superintendent made an investigation of the stur- 

 geon fisheries at the west end of the bay, with the view to taking up 

 the propagation of that species, but it was found that the conditions 

 would not warrant it. 



Following is a record of the maximum, mean, and minimum tempera- 

 tures of air and water, by months : 



