PENNSYLVANIA (Cont. ) 



6. Sea Lamprey Investigations 



Investigations are underway to determine the extent of sea lamprey activity 

 in the Pennsylvania waters of Lake Erie. Studies include incidence of scarring 

 and stream surveys during lamprey spawning period. 



Began 1952, continuing; $400; Alfred Larsen, Leader; reports available. 



Address inquiries to: Alfred Larsen, as in No. 3 above. 



7. Trout Population and Harvest Study 



Trout stocked in seven streams statewide were differentially marked as to 

 time of planting. A creel census was conducted on these streams throughout 

 the season. Post season shocking was conducted to determine the number of 

 fish of each planting which remained in the stream. Data were also obtained 

 on unmarked fish and natural reproduction. 



Southwestern Pennsylvania; began March 1956, closed November 1956; 

 $1, 000; Jack G. Miller, Leader. 



Address inquiries to: Gordon L. Trembley, as in No. 5 above. 



8. A Check List and General Distribution of Macroinvertebrates, Especially 

 Insects in Pennsylvania 



A compilation of already existing data and collections, both personal 

 and those at Colleges and Universities in Pennsylvania. 



Pennsylvania; began June 1956, indefinite; $200; Daniel G. Reinhold, Leader. 



Address inquiries to: Daniel G. Reinhold, 644 West Main Street, Lock 

 Haven, Pennsylvania. 



9. Lake Rehabilitation 



This project aims to improve both trout and warm water fisheries in lakes 

 through a program of accelerated chemical reclamation. Complete and partial 

 eradications are being attempted in conjunction with draining where possible. 

 Complete eradication and the construction of fish barriers are considered 

 mandatory for the management of trout in lakes. Rotenone is used to depress 

 competition prior to corrective restocking and introductions of predatory 

 game fish species. 



Pennsylvania Department of Forests and Waters cooperating; statewide; 

 began October 1954, continuing; $5,000; DeWayne E. Campbell, Jack G. Miller, 

 Daniel Reinhold, Richard Reppert, Roger Reed, Robert Bielo, and J. Curtis 

 Simes, Leaders. 



Address inquiries to: Gordon L. Trembley, as in No. 5 above. 



10. Effects of Natural Occurring Acidity Upon Stocked Trout 



This project is a study of the problems involved in trout plantings in waters 

 affected by natural occurring acidity. The experiment was conducted in a 

 stream where natural acidity exists in graduated degrees. During 1955 and 1956 

 fingerling and adult rainbow, brook and brown trout, reared in a limestone 

 hatchery, were tested. 



Plans are to test (1) trout reared under soft water conditions (2) several 

 strains of brook trout and (3) progeny of two brook trout which survived the 

 test period. 



Centre County; began 1955, to close 1958; $400; Jack M. Reddecliff, Leader. 



Address inquiries to: Gordon L. Trembley, as in No. 5 above. 



11. Experimental Fish Management 



This project vindertakes to test some of the more promising managennent 

 recommendations for combatting the unbalanced fish populations which underlie 

 poor fishing. Being tested are experimental introductions of predatory species 



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