BATH and O'CONNOR: BIOLOGY OF WHITE PERCH IN HUDSON RIVER ESTUARY 



200 



L= 32.64 + 45.56 (R) 



30> 

 0* 



1.0 2.0 3.0 40 



Scale Radius (mm) 



5.0 



Figure 6.— Relationship between scale radius and standard 

 length of white perch from the Hudson River between Nyack 

 and Bear Mountain, N.Y. r* = 0.88. 



1964 



1965 1966 1967 

 Year Class 



1968 1969 



Figure 7.— Graphic representation of the growth histories of 

 year classes of white perch from the Hudson River between 

 Nyack and Bear Mountain, N.Y., 1963-69. 



12 3 4 5 

 Age Group 



FIGURE 8.— Mean calculated standard lengths (mm) and incre- 

 ments of growth for each year of life of white perch from the 

 Hudson River between Nyack and Bear Mountain, N.Y. 



Male 



Males 



Log W= -2.262+ 1925 Log X 



Females 



Log W= -4.738+ 3099 Log X 



1 1 hi 



10 100 1000 



Standard Length (mm) 



Figure 9. — Length-weight relationships of male and female 

 white perch from the Hudson River between Nyack and Bear 

 Mountain, N.Y. For males, r 2 = 0.706; for females, r 2 = 0.965. 



605 



