Research Branch is divided into an administration group and 

 three sections, each with its subordinate units, with duties 

 and responsibilities as follows. 



ADMINISTRATION 



Supervises research programs, operates and maintains 

 Southern Research Station, and provides accounting and 

 personnel services and the following professional and tech- 

 nical services. 



Biomatbematics and Statistics 

 Drafting 

 Electronics 

 Library 

 Mechanical 

 Photography 



FISHERIES SECTION 



Great Lakes Units: Fisheries Research Stations at Glenora 

 (Lake Ontario), Wheatley (Lake Erie), South Baymouth (Lake 

 Huron), and Sault Ste. Marie (Lake Superior). 



Came Fish Units: Lake Trout, Brook Trout, Smallmouth Bass 

 and Walleye. 



Discipline Units: Selective Breeding, Parasitology, Lim- 

 nology, Productivity, and Technical Studies. 



FORESTRY SECTION 



Maple Units: Site, Tree Nutrition, Environmental Physiology, 

 Forest Ecology, Wood Science, Seed, Tree Breeding, For- 

 estry Economics, Mensuration, Fire Control, and Develop- 

 mental. 



Field Units: Midhurst Research Unit, Southwestern (Maple), 

 Southeastern (Tweed), South-Central (Dorset), Central (Sault 

 Ste. Marie), and Northern (Thunder Bay). 



WILDLIFE SECTION 



The Wildlife Research Station is located in Algonquin Pro- 

 vincial Park. The following units are located at Maple. 

 Big Came 

 Furbearers 

 Predators 



Upland Came and Waterfowl 

 Wildlife Diseases and Parasites 



A stage in the preparation of a display of the roots and 

 stump of a white pine by Research Branch at Southern Re- 

 search Station, Maple: the soil has been washed away with 

 fire hose. The completed work was placed on permanent 

 display at the Ontario Science Centre, Toronto. 



FISHERIES SECTION 



The fisheries research program reflects management needs 

 as expressed by Fish and Wildlife Branch. Within these pro- 

 grams, every effort is made to anticipate problems of a 

 broad nature, which are likely to develop, and to seek solu- 

 tions in advance. 



GREAT LAKES UNITS 



LAKE ONTARIO UNIT 



This program has three categories: cold-water fish studies, 

 warm-water fish studies, and stream studies. The first em- 

 phasizes the effects of fishing in stock changes; the second, 

 the effects of eutrophication; and in the third, the more 

 basic aspects of biological productivity. The program is 

 supplemented by arrangements for co-operative research 

 by agencies and individuals. 



The role of eutrophication in the deteriorative changes 

 in the whitefish population has been added to other factors 

 contributing to the decline of this species. The response of 

 the species to anticipated eutrophication control measures 

 will be closely observed. 



There was a serious decline in the whitefish catch. Indica- 

 tions are that the lamprey density has changed little since 

 the last report. The decline is attributed to an extreme re- 

 duction in recruitment since the catch relied on the 1965 

 year class which is now much reduced in numbers. The fact 

 that recent year classes have been progressively weaker is 

 cause for serious concern for the future of this species. 



Results of plantings of lake trout, mostly as fingeriings, 

 have revealed good survival to age 3. Survival beyond this 

 is poor, and few fish old enough to spawn were ever cap- 

 tured. The vulnerability of the trout to the whitefish fishery 

 and to the sea lamprey account for its failure to survive and 

 reproduce. 



Returns from splake planted in Lake Ontario in 1968 and 

 1969 have been very disappointing. They have not been 

 sufficient to determine the success of early survival or that 

 the dense sea lamprey population is responsible for the poor 

 sampling results. 



Coho salmon, from plantings by Ontario and New York 

 State, and chinook salmon, from New York State plantings, 

 were recovered from the fishery — chinook for the first time. 



Since identification is difficult between immature rainbow, 

 chinook, and coho, some difficulty has been experienced 



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