MONTANA (Cont. ) 



fishing. One of these ponds was rehabilitated last year and in September 1956 

 was stocked with fingerling rainbow trout. The other three ponds are relatively- 

 clean and will be stocked in 1957. Studies will be made to determine the best 

 means of stocking trout ponds, especially as to whether or not it is more 

 feasible to plant larger fish in the face of an existing trout population or to 

 rehabilitate the pond and stock with snnall fingerlings or fry. 



Northeastern Montana; began May 1952, to close April 1959; $7,500; 

 William Alvord, Leader. 



Address inquiries to: William Alvord, P. O. Box 394, Fort Peck, Mon- 

 tana. 



14. The Relationship of Cutthroat Trout and Yellow Perch in Lower Thompson Lake 

 The relationship of yellow perch and cutthroat trout have been studied in 

 1952 and 1953 in Middle Thompson and Lower Thompson Lakes in order to de- 

 termine any weak link in the life cycle of the perch. Perch fry were effectively 

 killed with rotenone while congregated in schools along the shoreline. The 

 entire shoreline of Lower Thompson Lake was treated with "Fish-Tox" in 

 July, 1956, to eradicate these fry. After the poison had dissipated, both 

 Middle and Lower Thompson Lakes were planted with about 300 fish per sur- 

 face acre. One of the objectives of this project is to determine the effects of 

 partial poisoning and subsequent planting of fish in one lake as compared with 

 planting and no poisoning in another lake. The over-all objective is to deter- 

 mine the most economical method to develop a fishery in a lake that has a 

 started yellow perch population. 



Lincoln County; began May 1952, to close February 1957; $2, 000; Frank A. 

 Stefanich, Leader; reports available. 



Address inquiries to: Frank E. Stefanich, as in No. 5 above. 



State University 



1. A Relationship of an Intergeneric Hybrid in Relation to its Parental Genera 

 (Mylocheilus and Ptychocheilus) 



This project consists of correlating numbers of hybrids with the parental 

 species through various parts of Flathead Lake and various seasons of the 

 year. 



State Fish and Ganne Department cooperating; Flathead Lake; began 

 June 1950, to close September 1957; Royal Bruce Brunson, Leader. 



Address inquiries to: Royal Bruce Brunson, Assoc. Professor of Zoology, 

 Montana State University, Missoula, Montana. 



2. Limnological Surveys of Various Waters of Western Montana 



The objectives are to map various lakes and include with the map, a 

 survey of the plankton, benthos, nekton, and physco-chemical conditions of 

 the lake at specified times. 



Western Montana; began August 1949, continuing; $100; Royal Bruce 

 Brunson, Leader. 



Address inquiries to: Royal Bruce Brunson, as in No. 1 above. 



« 



3. A Limnological Study of Flathead Lake 



The objectives are to determine the major physical and chemical factors, 

 the plankton, the benthos, and a hydrographic study of the lake. 



Flathead Lake; began June 1956, indefinite; irregular; Royal Bruce 

 Brunson, Leader. 



Address inquiries to: Royal Bruce Brunson, as in No. 1 above. 



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