LVI 



REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



salt aud escaped tlie disease entirely. Salt and earth were thereafter 

 put in all the nursery tanks two or three times a week till the fry were 

 transferred to tlie ponds. 



Loch Leven trout. — On January 2, 1892, the 25,000 eggs of this trout 

 shi])i)ed from the Xorthville Station December 20,1891, were received, 

 in good condition, aud hatched daring the month, producing 24,746 

 fry. The white spot in the sac soon appeared, and a heavy mortality 

 occurred during February and March. 



Yon Behr trout. — Eggs of the Von Behr trout were secured from the 

 stock fish of Dr. John Law. The spawning season commenced iu 

 December, and was over by February 3. There were taken 21,400 

 eggs, which were very poor, only 20 per cent being good. From the 

 Northville Station there were received on January 9, 1892, 50,000 eggs, 

 shipped January 5, and on February 16th 30,000 eggs, shipped Febru- 

 ary 13. Both lots were iu good condition on arrival at the station. At 

 the end of February about 70 per cent of the good eggs had hatched, and 

 the remainder were all hatched before the close of May. The number 

 of fry on hand May 31 was 72,986, nearly the whole of which were from 

 the eggs sent from the North ville Station. In June 10,000 were placed 

 in waters of Lake County, as follows: Arkansas River, 5,000; Rock 

 Creek, both above aud below the falls, 3,000, and in Lower Evergreen 

 Lake, 2,000. 



At the close of the year the stock of fish, fry, and eggs at the sta- 

 tion was as follows : 



The distribution from the station commenced October 16, 1891, and 

 was completed by November IS, with the exception of one shipment of 

 1,000 black-spotted trout, whicli were taken by the superintendent on 

 February 3, 1802, to the North ville Station. There were distributed 

 19,000 black-spotted trout, 54,200 Von Behr trout, and 38,550 brook 

 trout. 



Before the introduction of water from the lower Evergreen Lake, 

 November, 1891, the temperature of the water was 43° F., and the 

 growth of the fish was slow. Prior to May 1, 1892, the lake water 

 lowered tlie temperature to 39° F., but after that date there was a 

 rapid rise, ranging from 52° to 00°, the average daily change being 

 about 6°. In May and June, 1892, the fish grew rapidly, owing to the 

 higher temjteratnre of the water and the increase tlierein of vegetable 

 and animal food. On account of the uneven growth of the fish the 

 product of the station will undoubtedly be reduced by increased canni- 

 balism among the fish. 



