FISHERY BULLETIN: VOL. 87, NO. 1 



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1979 1980 1981 1982 1983 1984 1985 1986 



Figure 8.— Estimates of the monthly catch rates for Japanese longliners (number of yellowfin tuna 

 per 1,000 hooks) in the western Pacific. Error bars represent estimates of one standard error. 



Table 2.— Comparison of annual estimates of the overall average catch rate of yellowfin tuna 

 (number/1 ,000 hool<s) by Japanese longliners in the western Pacific based on various areal and tem- 

 poral stratifications of the data. Values in parentheses are estimates of standard error and n is the 

 number of strata contained within each estimate. Stratum in which less than 20,000 hooks a set were 

 not included. 



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