formation obtained on the effect of an experimental chub fishery. 



Records of lamprey scarring show an increase, particularly in the in- 

 shore fisheries which are declining rapidly. 



Lake Huron 



Research in Lake Huron continued to be confined largely to an inten- 

 sive study of fish populations in South Bay, Manitoulin Island. Changes that 

 are occurring have not been the result of the intensive fishery established there 

 in 1947, but rather the results of natural phenomena, particularly the sea 

 lamprey. 



Attempts to re-establish lake trout by hatchery plantings in the face of 

 lamprey predation are being continued. Speckled lake trout hybrids which have 

 also been introduced, seem to be less vulnerable to lamprey attack. 



The utilization of undesirable fish as mink food was expanded. Fish 

 were also supplied to the Ontario Veterinary College where staff conducted ex- 

 periments to find the most desirable ration. 



An analysis of data collected on smallmouth bass in the period 1947-1954 

 demonstrated the influence of temperature on the strength of year classes. 



Information obtained from questionnaires indicated an increase in 

 lamprey predation on commercial species. 



Lake Erie 



Research in Lake Erie in 1955 was mainly concerned with the fish 

 movements, age, growth and food of commercial species. Some 4, 000 fish 

 were tagged and 5, 500 fish examined. The tagging has shown that blue walleye 

 wander widely throughout the lake. 



Information was also obtained on the distribution and growth of the sea 

 lamprey which appear to be increasing in abundance. Sea lampreys were taken 

 more often in the east basin than in the western portion of the lake. A major 

 run of sea lamprey was located at Big Creek near Delhi. 



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