METRIC TONS 

 DLESSTHAN 1.00 



1. 01 2.00 



^2.01 3.00 



B^MORE THAN 3.00 



APRIL - JUNE 



Figure 4. — Distribution of skipjack tuna catches (top) and catch per standard effective trip 

 (bottom) averaged over an 18-year period, by regions, second quarter, 1948-65. 



fishery, found a similar trend but believed it 

 did not reflect a change in abundance. He stat- 

 ed that the increasing trend resulted from in- 

 equities in the distribution of effort and from 

 occasional multiple-day trips which occur an- 

 nually, particularly among Oahu-based vessels 

 traveling to Kauai and other neighboring is- 

 lands. The Y/f calculated tor Kauai regions, 

 therefore, may not be representative of appar- 



ent abundance of these regions. Because data 

 from the fishermen's catch reports do not show 

 the number of days fished per trip, it is not 

 possible to isolate multiple-day trips to the 

 Kauai regions. In the following section, there- 

 fore, apparent abundance in the Kauai regions 

 is not discussed; catch per trip was also omit- 

 ted from figures 3-6. 



Quarterly trend, by regions . --The quarterly 



