Table 6,— Analysis of bigeye tuna catch by depthi/j 

 Smith Cruise 7o 



Hooksg/ 



Station 



Total 

 number 

 of fish 



(2 



A 

 and 



4) 



(1 



B 

 and 



5) 



C 

 (3) 



20 thru 35. 



,3/ 



18 



13o528*APoo1ad X^ 

 (d<,f„2) 



Hypothesis ; The population of bigeye tuna is homogeneously 

 distributed v/ith respect to depth, therefore a 

 2s2sl ratio is expected from hook groups A, B, and 

 C. 



Conclusion s The significant pooled X^ value of 13„528 (P<0,Ol) 

 indicates tliat there is a difference in catch from 

 the 2s2sl ratioo Before conclusions can be drawn 

 it should be noted that due to the insufficient amount 

 of data available, the values have been pooled and no 

 analvsis of interaction madeo 



1/ 



-^ Arrangement of geari 3 floats per basket with 3 different lengths 



of droppers. See figure 4. 



2/ 



-'Hook arrangements? 



As Shallow hooks (2 and 4), 5-fathom droppers,, 



Bs Intermediate hooks (l and 5), 25-fathom droppers, 



C; Deep hook (s), a 40- fathom droppero 



.^Stations lumped to give minimum expected numbers of 5o 



29 



