PENNSYLVANIA (Cont. ) 



vegetation, logging and other access roads, and skid roads upon quality of 

 water. Water quality measurements before treatment of small forested water- 

 sheds are compared with quality measured after treatment. 



Pennsylvania Department of Forests and Waters and U. S. Geological 

 Survey; headquarters - Upper Darby; began 1951; Kenneth G. Reinhart, Irvin C. 

 Reigner, and Victor S. Jensen, Leaders; reports available. 



Address inquiries to: Kenneth G. Reinhart, Mountain State Research 

 Center, Elkins, West Virginia (Allegheny Mts.), Irvin C. Reigner, Kingston 

 Research Center, Kingston, Pennsylvania (Pocono Plateau), and Victor S. 

 Jensen, White Pine-hardwood Research Center, Laconia, New Hampshire 

 (White Mountains). 



2. Streamflow Relations 



The objective is to determine the influence of forest management practices 

 and changes in vegetation upon streamflow. Research is conducted on small, 

 forested watersheds on which continuous streamflow records taken during a 

 pre-treatmeint period are compared with records taken after treatment on 

 records from a control watershed. Effects of treatment on water yield, peak 

 flows, and low flows are determined. 



Pennsylvania Department of Forests and Waters and U. S. Geological 

 Survey cooperating; headquarters - Upper Darby; began 1951; Kenneth G. 

 Reinhart, Irvin C. Reigner, and Victor S. Jensen, Leaders; reports available. 



Address inquiries to: A^ in No. 1 above. 



Lehigh University 



1. Study of Effects of Thermal Pollution on Delaware River Fish 



Approximately 120, 000 g. p. m. of river water is taken from the river to 

 be used as cooling water in a steam electric plant. The water temperature is 

 raised about 26° F. by passage through the plant and then returned to the 

 river. The study being made includes the effects of heated water on river 

 fishes, plankton, aquatic insect populations , and aquatic plants. Chemical 

 and temperature studies are also conducted. 



Pennsylvania Power and Light Company cooperating; Martins Creek, 

 Pennsylvania and portion of Delaware River; began December 1955, to close 

 December 1957; F. J. Trembley, Leader. 



Address inquiries to: F. J. Trembley, Department of Biology, Lehigh 

 University, Bethlehem, Pennsylvania. 



Pennsylvania State University 



1. The Effect of Differential Feeding Experiences Upon Survival of Trout in Arti- 

 ficial and Natural Environments 



The objective is to test the hypothesis that the food type (natural food 

 versus ground liver) first experienced by trout will be related to their rate of 

 survival under natural and artificial conditions. Four groups of 312 brown trout 

 were fed daphnia, liver, or sequential combinations of these for seven months 

 before release into a natural stream controlled by weirs and traps. A sur- 

 vival covint will be made in late November 1956, and again in March 1957, to 

 check winter survival. A controlled fishing test of catchability will be made ■ 

 in April 1957, to determine effects of early feeding experience upon ease of 

 catchability. 



Pennsylvania Fish Connmission cooperating; Benner Spring Research Sta- 

 tion and nearby stream; began January 1956, indefinite; $2, 000; R. E. Stover 

 and J. H. Grosslite, Leaders; reports available. 



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