Table 66. Spawning stock biomass and fishing intensity of Pacific bluefin tuna (Thunnus orientalis) in 1995 (recent high biomass), 2002-2004 (WCPFC reference year biomass), 2011 (biomass 5 years ago), and 2016 (latest) to those of the adopted WCPFC biomass rebuilding targets. SPR is used as a measure of fishing intensity; the lower the number the higher the fishing intensity that year. initial Second 1995 2002-2004 2011 2016 rebuilding rebuilding (recent (reference (5 years (latest) target target high) year) ago) SSB Biomass 20% 10.4% 7.1% 2.1% 3.3% (%SSBF=0) = 6.7% SPR 6.7% 20% 5.1% 3.4% 4.9% 6.7% Table 67. Ratios of the estimated fishing intensities mortalities (Fs and 1-SPRs for 2002-04, 2012-14, 2015-16) relative to potential fishing intensity-based reference points, and terminal year SSB (t) for each reference period, and depletion ratios for the terminal year of the reference period for Pacific bluefin tuna (Thunnus orientalis).
Table 66. Spawning stock biomass and fishing intensity of Pacific bluefin tuna (Thunnus orientalis) in 1995 (recent high biomass), 2002-2004 (WCPFC reference year biomass), 2011 (biomass 5 years ago), and 2016 (latest) to those of the adopted WCPFC biomass rebuilding targets. SPR is used as a measure of fishing intensity; the lower the number the higher the fishing intensity that year. initial rebuilding target Second rebuilding target 1995 (recent high) 2002-2004 (reference year) 2011 (5 years ago) 2016 (latest) Biomass (%SSBF=0) SSB = 6.7% 20% 10.4% 7.1% 2.1% 3.3% SPR 6.7% 20% 5.1% 3.4% 4.9% 6.7% Table 67. Ratios of the estimated fishing intensities mortalities (Fs and 1-SPRs for 2002-04, 2012-14, 2015-16) relative to potential fishing intensity-based reference points, and terminal year SSB (t) for each reference period, and depletion ratios for the terminal year of the reference period for Pacific bluefin tuna (Thunnus orientalis).
06%20Pacific%20Bluefin%20Tuna%20SS%20and%20MA%202018.docx