struction of the outside rearing facilities is near completion and the station will 

 be ready for full scale production in 1963. At NormandaJe, the production of fish 

 was curtailed mainly because of the poor condition of the hatchery building and 

 the rearing ponds. Preliminary field work was initiated for the construction of a 

 new hatchery building and a series of circular ponds at this location. 



Fish culture operations at Kingsville Hatchery and at the Mount Pleasant 

 and Ingersoll Pond stations were discontinued in 1962. The operation of these 

 stations for the production of fish was terminated mainly because of the reduced 

 need for whitefish and walleye eyed eggs and fry (Kingsville Hatchery) and for 

 smallmouth bass fry and fingerling stock (Mount Pleasant and Ingersoll Pond) 

 for restocking purposes. Brook trout was also produced at the Mount Pleasant 

 station but, because of the general deterioration of the volume and quality of the 

 water supply in recent years, its use for this purpose became of little practical 

 value. Following the closure of this station for fish production, the property was 

 used as an experimental public fishing area (see section on special projects). 



Two hundred thousand lake trout eyed eggs were secured this year from the 

 Manitoba Government in exchange for one hundred thousand brook trout eyed 

 eggs and one hundred thousand maskinonge fry supplied from Dorion and Deer 

 Lake Hatcheries respectively. Two additional lots of one hundred thousand 

 maskinonge fry were also supplied to the National Parks Branch of the Federal 

 Government and to the Fish and Game Department of the Province of Quebec 

 from the Deer Lake Hatchery. 



A number of special projects were undertaken in the field of hatchery 

 operations during the current year. The most important of these included: — 



WALLEYE POND CULTURE 



This study was initiated at the White Lake jx)nd station in 1961 to investigate 

 the practicability of culturing walleye to the fingerling stage in hatchery ponds. 

 The results from this project to date have been very encouraging. An apparent 

 relationship was found between survival and the length of time elapsing from the 

 onset of cannibalism. By improving the technique in culture and harvest accor- 

 dingly, the rate of survival of the fish was improved and the average cost per 

 fingerling was reduced from 2.3 cents per fish in 1961 to 0.7 cents per fish in 

 1962, which is equal to or less than the cost quoted by other agencies for the 

 culture of fingerling size walleye. 



EFFECT OF LIGHT ON TROUT EGGS DURING INCUBATION 



Preliminary studies were undertaken at the Chatsworth trout rearing station 

 to investigate the effect of various forms of artificial fluorescent lighting and natural 

 light on the incubation of lake trout egg stocks. No significant difference was found 

 among the various lots incubated under the different lighting conditions used. 

 However, the study is to be continued with other species of trout (i.e. rainbow 

 and brook) in the future. 



EFFECT OF WATER TEMPERATURE ON THE LAKE TROUT EGGS 

 DURING INCUBATION 



Studies were initiated at the Wiarton, Chatsworth and Tarentorus Hatcheries 

 to investigate the effect of different water temperatures on the survival of lake 

 trout during the period of egg incubation and early stage of fry development. 

 Initial results from these practical experiments indicated that the higher tempera- 

 ture of spring water supplies (Chatsworth and Tarentorus) may adversely affect 

 the survival of lake trout, at least during the period of development in the egg 

 stage. This study is to be continued. 



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