Table 49. — A comparison of the total number of gill rakers of striped bass 

 from the Hudson and Delaware Rivers 



River 



Total No. Gill Rakers 

 22 23 2k 25 26 2? 28 29 



No. 



Mean S(X - x) 



^^2 



Delaware - 11 34 1^4 1|4 5 

 Hudson 1 8 50 248 31? 134 29 2 

 t = 8.63** 



138 

 789 



24.986 

 25.77^ 



141.971 

 763.843 



Delaware River samples included young and yearling specimens of the 1951> 

 1952 and 1954 year classes. 



54 



INT.-DUP. SEC, HASH.. D.C;0157 



