REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



23 



A few eggs were taken from brook trout in the fall of 1893: 



From fish of 1889 4, 600 



From wild fish caught from time to time and held in con- 

 finement at station (taken at station) 4, 600 



Total 9,200 



Received from Green Lake, February 20, 1894 10, 000 



Total 19,200 



From tliese eggs 17,190 fish were hatched, of which 9,000 were on 

 hand June 30, 1894, 



The rainbow trout were fed in troughs during the summer. On Sep- 

 tember 21st, 500 were transferred to Green Lake, and November lath, 

 471 were delivered to the agent of the Maine commissioners. Of the 

 13 fish hatched in 1889, only G remained at the end of the year. 



The Loch Leven, Swiss Lake, and Von Behr trout on hand at the 

 beginning of the year had become intermixed by dislocated partitions 

 in the ponds, and, in accordance with instructions, were all liberated 

 together in Heart Pond, 2 miles from the station. 



Of the G3 Scotch sea trout on hand July 1, 1893, only 27 were left in 

 November, by reason of mink having gained access to the pond. The 

 fish spawned in the autumn of 1893, and yielded, November 2, 1893, 

 about G,000 eggs, from which 3,178 very weak fish were hatched, the 

 last of which died June 11, 1894. 



The fish have been fed during the year, as formerly, on chopped 

 material derived from butcher's offal, and on maggots produced at the 

 station. Considerable attention has been given to the production of 

 natural food — live food in the station ponds — one man being kept 

 nearly the entire time from April to July in the collection of material, 

 its distribution in the ponds, observations on the pond temperatures, 

 and the growth and multiplication of the entomostraca, etc., of which 

 the collections mainly consisted. 



The maximum and minimum temperatures of the air and water dur- 

 ing the year were as follows : 



Month. 



1893. 



July 



August 



September 



October 



November , 



December 



1894. 



January 



February 



March.. 



April 



May 



June , 



Air temperature. 



Maximum. Minimum 



Water temperature. 



Maximum. Minimum 



38 

 37* 

 43" 

 51J 



op 

 56 

 58 

 53 

 46 

 34 

 32 



32 

 32 

 33 



33* 

 42" 

 52 



a Below zero. 



