counts of any populations along the Atlantic 

 Coast (tables 42 and 43) . 



A comparison of the James and Hudson 

 populations . --Raney (ms.) found that within 

 the Chesapeake Bay the James River subpopula- 

 tion is the best defined; ihc other two are the 

 York -Rappahannock and the Upper Bay. There- 

 fore it is meaningful to make a comparison of 

 the number of gill rakers of samples from the 

 James and Hudson Rivers. A highly significant 

 t-value was indicated by a t - test of the 1954 

 year class (table 27A) and the 1953 year class 

 table 27B). 



Gill raker counts from the James River 

 are high and approach those from the Hudson 

 River closer than do other samples of striped 

 bass from the Chesapeake Bay. Due to the high 

 magnitude of the t - values, indications seem 

 to point to the fact that the Hudson and James 

 River samples belong to separate populations. 



The Long I sland Sound population. -- 

 Raney, Woolcott and Mehring (1954:394) have 

 shown that there are movements of striped bass 

 between the western end of Long Island Sound 

 and the Hudson River. Merriman (1941:38-49) 

 found that migratory schools of the Chesapeake 

 Bay population cross the eastern end of Long 

 Island Sound during the fall and spring. There- 

 fore it was of interest to note how the samples 

 from the western quarter of Long Island Sound 

 compare to those of the Chesapeake Bay and Hud- 

 son River populations. 



Collections from the western end of Long 

 Island Sound were divided into year classes 

 (1949, 1950, 1951, 1952 and 1953) and an analy- 

 sis of variance was run. The result was not 

 significant (table 28), so that it is valid statis- 

 tically to lump these year classes together as a 

 composite sample to get a general mean based 

 on the total number of gill rakers. In the Hud- 

 son River, homogeneity of gill raker numbers 

 exists among the 6 year classes studied as 

 demonstrated above . Therefore, in order to 

 make the comparison among fish from the 3 

 areas, the mean of the 1954 year class from the 

 Hudson was compared with the general mean of 

 5 year classes from the western end of Long 

 Island Sound and the mean of the 1955 year class 

 from all the tributaries that were sampled from 



the Chesapeake Bay. Striped bass from the 

 western end of Long Island Sound were found to 

 be intermediate between the Chesapeake Bay and 

 Hudson River populations (table 29). Similar 

 comparisons were made for other year classes 

 that had smaller samples and in all cases the 

 relationship was the same as that stated above. 



A comparison of populations from 

 California with those from the Chesapeake Bay 

 and Hudson River . --In order to make compar- 

 isons with other localities it was necessary to 

 find samples from several year classes from 

 the Chesapeake Bay that were homogeneous. For 

 the total number of gill rakers, samples from 

 the Upper Chesapeake Bay were tested using an 

 analysis of variance and the F - value was just 

 significant at the 5 percent level (table 30) . A 

 similar test using the number of gill rakers on 

 the upper arm gave an F - value which was not 

 significant (table 31). It is concluded that the 

 samples from the Upper Bay are biologically 

 homogeneous and therefore can be used to make 

 comparisons with other areas. Additional 

 analyses of variance were run between samples 

 from several year classes of the James River 

 and samples from the York -Rappahannock Rivers. 

 In all cases the F - values were highly significant 

 indicating that they were not homogeneous among 

 year classes . 



An analysis of variance based on the total 

 number of gill rakers was conducted for the 

 samples from California, which included the 1943, 

 1945 and 1951 year classes and F was significant 

 at the one percent level (table 32). A chi- square 

 test was run on the same samples using the numi- 

 ber of gill rakers on the upper arm and was 

 significant at the one percent level (table 33) . 

 IDue to the heterogeneity existing among year 

 classes in California, an analysis of variance 

 was carried out for samples of the 1945 year 

 class; the F was not significant in this case 

 (table 34). 



At- test using the total number of gill 

 rakers was worked out between the Upper Chesa- 

 peake Bay composite sample and a sample from 

 the California 1945 year class; t was highly sig- 

 nificant and had a considerable magnitude (table 

 35A). The 1945 year class from California was 

 used because of the larger number of specimens 

 available. The 1945 year class from California 



