Incidental Catch of Marine Birds Incidental Catch of Marine Birds in the North Pacific High Seas Driftnet Fisheries in 1990 Estimation Methods and Results Japanese Squid Fishery Information was available for 74 Japanese vessels in the North Pacific squid driftnet fishery. The observed take of birds in the Japanese squid fishery ranged from 8 Leach's Storm-Petrels to 28,332 dark shearwaters. Table 1 gives values for all taxa, and Table 2 gives observed bycatch rates. Projecting the observed bycatch by taxon to the entire effort gives estimated total bycatches shown in Table 3 . Also given are estimated standard errors.
Standard errors are in parentheses.
Projections for the entire fishery are given in Table 3 . Effort data for the Japanese large-mesh fishery included 3,485 operations involving 4,682,630 standardized effective tans. The Koreans engaged only in squid fishing. The Korean observer program was new in 1990 and experts in marine bird identification were not available during the training of Korean scientific observers. Since the situation was not clear when we conducted our analysis, we chose to use only U.S. observations in the 1990 data.