Table l5.~Chi-square analysis of bigeye tuna catches by hook 

 depths, Charles H, Gilbert Cruise 1 



Hypothesis ; The population of bigeye tuna is homogeneously distributed 

 with respect to depth; therefore a lslsl ratio is expected 

 from the three depth zones. 



Conclusions ? The presence of a difference in the number of bigeye tuna 

 caught with depth is indicated by a significant pooled 

 IC? of 8 a 000 (d„f„2 5 P<0„05) and a low nonsignificant 

 interaction pC . 



-> Stations lumped to give minimum expected numbers of about J?« 

 * indicates a significant (P<0„05) chi-square value. 



2U 



