X 



55 



45 



35 



55 



45 



U 



- 35 



> 



_l 

 LlJ 

 Q. 



55 



45 



35 



SEPTEMBER 1955 GULF OF MAINE 

 DECEMBER 1955 NEW JERSEY 



NO 



DATA 



APRIL 1956 GULF OF MAINE 



APRIL 1956 NEW JERSEY 



NOVEMBER 1956 GULF OF MAINE 

 NOVEMBER 1956 L. I S N J 



i60 



330 390 260 



FORK LENGTH 



330 



390 

 I 



Figure 2.--Plotied regression lines for head length (left) and pelvic fin length (right) on fork length from silver hake 

 samples taken from the Gulf of Maine, Rliode Island. Long Island, and New Jersey waters. 



Island and New Jersey. The resulting 

 "F" value was significant at the 5- 

 percent level. The Rhode Island and New 

 Jersey collections were also compared 

 and the resulting "F" value was not 

 significant (table 4). These results 

 indicate that this characteristic can 

 also be used in separating the two 

 groups. The variance of these compari- 

 sons was too large to apply the T-test. 



Eye Diameter 



The same comparisons were made 

 for this character as for the ventral 

 fin. The resulting "F" value was sig- 

 nificant for the comparisons betwe,en 

 the northern and southern sannples, 

 but was not significant when the two 

 southern samples were compared 

 against each other (table 4). The 



10 



