FISHERY HI'LLKTIN: VOL. 86, NO. 4 



Table 4.— Data for analysis, by Chi-square contingency tests, of the integrity of schools of skipjack tuna released during tagging cruise 



1079. [exp. = expected; obs. = observed.] 



and observed values, and the results are shown in 

 the last four columns of Table 4. The categories were 

 combined so that none had an expected value of less 

 than 5. For the first test in Table 4 (releases on 9 

 June 1976, and recaptures during June), for exam- 

 ple, the expected values are 284.87 and (11.38 -i- 

 0.63 + 0.09 + 0.02 = 12.12) and the observed values 

 are 285 and (11 -i- 1 = 12). When only one category 

 had an expected value of 5 or greater no test was 

 run. 



The two total lines for each section of Table 4 are 

 listed in Table 5, with the equivalent values for the 

 other four experiments. These were summed for 

 each cruise and month of recapture, and Chi-square 

 tests were run with these sums. Those results are 

 shown in the last four columns of Table 5. 



The results of the tests are summarized as follows: 



Months of recapture 



636 



