2007: Technical Summary

Generalized linear model (GLM) was used to standardize the CPUE for northern Atlantic Albacore caught by Taiwanese longline fisheries during 1968-2001. Three sub-areas are defined based on the species composition of 12 5x5 statistical blocks. The subarea 3, where non-albacore-directed efforts have increased since mid-1980s, is not the traditional albacore fishing ground. We find that the standardized CPUE trend indicated that: (1) CPUE appeared to sharply decline at the beginning of the fisheries (early 1968 to 1971), but it remained rather stable until the mid-1980s; (2) CPUE trend appeared to decline since 1988, but rose slightly i