ANNUAL REPORT, 1936-37 19 



Some work is being done on a close relative, the Atlantic salmon, to determine 

 whether it will become established in land-locked bodies of water which are suitable 

 for lake trout. 



LAKE TROUT: 



The majority of the lake trout fry were retained to fingerling size for distri- 

 bution, and as a result the number distributed exceeded that of the previous year 

 by nearly 3,700,000. 



WHITEFISH: 



There was an increase of approximately 44.5 per cent over the distribution 

 of the previous year. 



HERRING: 



An increase of 28.2 per cent, approximately, in the distribution of herring fry 

 over that of the previous year was obtained. A greater production of spawn of 

 the Lake Erie herring or Cisco would undoubtedly assist in the replenishment of 

 this important species in that body of water. 



YELLOW PICKEREL: 



There was an increase in the distribution of pickerel fry amounting to 31 per 

 cent over that of the previous year. 



Following previous practice, two million eyed eggs (potential fry) were handled 

 by the Sparrow Lake Hatchery, the fry therefrom being distributed in suitable areas 

 in Sparrow Lake. 



SMALL-MOUTHED BLACK BASS: 



There was an increase of approximately 12 per cent in fry distribution as com- 

 pared with that of the previous year. Although there was a decrease in the number 

 of fingerlings as a result of a reduction in the yield from IngersoU Pond, there was 

 a fair increase in the number of adults distributed. 



LARGE-MOUTHED BLACK BASS: 



Following the previous year's practice, one pond was operated for large- 

 mouthed black bass production and although there was a decrease in the number 

 of fry, there was a substantial increase in the number of fingerlings produced by 

 this pond, when it is considered that the pond in question is less than one acre in 

 extent. 



YELLOW PERCH: 



The yellow perch is among the more important commercial species of fish taken 

 in Lake Erie. All the perch spawn collected by the commercial fishermen was 

 cultured in the Kingsville Fish Hatchery and the fry resulting therefrom were 

 planted in suitable habitats in Lake Erie. 



MASKINONGE: 



There was a reduction in the total number of maskinonge fry planted as com- 

 pared with that of the previous year. This was due primarily to reduced collection 

 of eggs as a result of such unfavourable factors as unsatisfactory weather con- 

 ditions, paucity of breeding males, resulting to some extent in ineffective fertili- 

 zation. Among the chief prerequisites to success of maskinonge propagation is to 

 have a suitable number of males and females spawning simultaneously and a gently 

 rising temperature. Sharp fluctuations in the temperature of the water are detri- 

 mental to successful results. 



On this Continent unsuccessful attempts have been made to rear lunge to the 

 fingerling stage in appreciable numbers. According to authentic statistics the record 

 number of maskinonge fingerlings produced as a result of pond culture by one of 

 the States of the United States foremost in this field of fish culture was 4,125 in 



