LXXXIV REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



abuiKlaiit as it slioiild be. The maximum temperature of the water in 

 these ponds between April 1 and June 1 was 78°; minimum, 48'=>. 



In the spring the 180 adult crappie remaining were placed in three 

 of the 80 foot ponds. They were observed nesting on May 11, and 

 though a number of nests were noticed between that time and June 4 

 no young fish were discovered. 



A supply of rock bass was also placed in one of the 80-foot ponds. 

 They commenced te spawn about the middle of May, and at the close of 

 the year several schools of young fish were seen in this pond. 



In addition to the rainbow trout on hand at the beginning of the 

 year, 1,000 yearlings were received from Keosho in November. These 

 arrived in excellent condition and were placed in the ponds with the 

 others to be reared. In January and February two consignments of 

 eggs, amounting to 41,720, were received from ]S^eosho, which produced 

 30,364 fry. Of these, 4,000 were distributed to applicants in Iowa and 

 26,303 remained on hand at the close of the year. During the fall 85 

 2-year-olds and 74 yearling rainbow trout were collected from one of 

 the streams in the vicinity of the station and added to the brood stock. 



All of the brook-trout streams in the eastern and northern parts of 

 the State were examined during the summer, with a view to making col- 

 lections of eggs and brood-fish, but at no point could sufficient numbers 

 be found to justify the expense of establishing a field station for the 

 collection of eggs. 513 adult trout were secured, which yielded 38,592 

 eggs during October. In addition to these, 100,000 brook-trout eggs 

 were purchased in Massachusetts, which arrived in excellent condition 

 in January and produced 83,700 fry. During the spring 19,000 brook- 

 trout fry were distributed, and at the close of the year there remained 

 at the station 79,595 fry. Consignments of 480,000 lake-trout eggs 

 from Duluth and 50,000 grayling from Bozeman were transferred to 

 this station. The lake trout arrived with a loss of only 723 ; subsequent 

 losses, amounting to 42,600, occurred, however, during incubation. 



The fry which resulted from these eggs, amounting to 437,000, were 

 planted in public waters during the spring, with the exception of 400 

 which were held for experimental purposes. The grayling eggs, which 

 arrived in fair condition, hatched in June with a loss of 8,710. They 

 appeared to be strong and healthy, though it is diflticult to induce them 

 to take artificial food. 



The stock on hand at the close of the year was as follows : 



