LXXVIII REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



fisb warden aud that 75 per cent of the fry resulting from spawn so 

 taken be planted in the waters of Michigan, will allow the Commission 

 in future to continue work during the closed seasou, and will undoubt- 

 edly permit the collection of as many lake-trout eggs as may be needed 

 to fill the hatcheries of the Commission. 



The brook-trout brood-fish at the station yielded 97,600 eggs between 

 October 18 and December 13. As it is important that the supply of 

 this fish be kept up in the various streams of Michigan, 038,000 eggs 

 were purchased from a private hatchery at South Wareham, Mass., and 

 90,000 eggs from wild fish were transferred from the St. Johnsbury 

 station. The eggs from Vermont were excellent, aud commenced hatch- 

 ing December 10 and finished December 22, producing 94,114 strong, 



New hatchery, Northville Station, 1899. 



active fry. Of these, 92,994 remained in the rearing- troughs February 8. 

 Early in April these fry were observed to be i^eculiarly affected. They 

 refused to take food, seemed to grow constantly weaker, and each of the 

 affected ones developed a small red spot. By ]\Iay 1 they commenced 

 dying in large numbers, and before the disease could be checked and the 

 fish distributed nearly 32,000 had died. 



The eggs purchased from Massachusetts produced 018,000 fry, which 

 were held for several months and then distributed, making the total 

 distribution of brook-trout fingerlings 669,000. A small number were 

 retained for the fall distribution, and on June 30 they numbered 31,493. 



During November the trout carried over from the lirevious year were 

 attacked by an epidemic, and very heavy losses ensued. Mr. M. C. 



