APPLYING SURVIVAL CURVES 47 



Until sufficient information is available to correct for compensa- 

 tion and avoidance, potential adult loss should be expressed as a 

 possible range, such as those obtained with Eqs. 3 and 7 and with the 

 methods proposed here, e.g., 23,000 to 127,000. The calculated 

 adult losses can then be compared with some reference for 

 acceptability, such as year-to-year variation in population size 

 (Environmental Protection Agency, 1976). Since the average year- 

 to-year variability of the Oneida Lake adult walleye population was 

 approximately 156,000 during 1957-1974 (Forney, 1976b), it 

 appears that our calculation of potential adult loss would be 

 acceptable. 



ACKNOWLEDGMENTS 



The background for this study was achieved through the 

 preparation and review of impact statements for the Ecological 

 Sciences Division of NUS Corporation, of which P. V. Morgan is vice 

 president and general manager. The manuscript was reviewed by 

 P. V. Morgan, B. C. Marcy, P. A. Dahlberg, L. K. Davis, V. R. Kranz, 

 and H. A. Haerer of NUS Corporation; P. A. Hackney of the 

 Tennessee Valley Authority; and T. J. Horst of Stone and Webster 

 Engineering Corp. W. J. B. Johnson of NUS Corporation drafted the 

 figure. 



REFERENCES 



Busch, W. N., R. L. Scholl, and W. L. Hartman, 1975, Environmental Factors 

 Affecting the Strength of Walleye {Stizostedion vitreum vitreum) Year -Class 

 in Western Lake Erie, 1960-70, J. Fish. Res. Board Can., 32(10): 1733-1743. 



Clady, M. D., 1975, Population Dynamics of Walleye and Yellow Perch in 

 Oneida Lake, April 1, 19 70, to March 31, 1975, Federal Aid Project F-17-R, 

 Job I-e, New York State Conservation Department, Albany. 



Environmental Protection Agency, 1976, Development Document for Best 

 Technology Available for the Location, Design, Construction and Capacity 

 of Cooling Water Intake Structures for Minimizing Adverse Environmental 

 Impact, Sect. 316(b), P. L. 92-500, Washington, D. C. 



Forney, J. L., 1976a, Year-Class Formation in the Walleye (Stizostedion vitreum 

 vitreum) Population of Oneida Lake, New York, 1966—1973, J. Fish. Res. 

 Board Can., 33: 783-792. 



, 1976b, Population Dynamics of Walleye and Yellow Perch in Oneida Lake, 



April 1, 19 75, to March 31, 1976, Federal Aid Project F-17-R, Job I-a, New 

 York State Conservation Department, Albany. 



Hackney, P. A., 1977, Methods for Calculating Survival Rate, Biomass Produc- 

 tion, and Proportion Entrained of Lacustrine Ichthyoplankton, in Proceed- 

 ings of the Conference on Assessing the Effects of Power-Plant-Induced 



