Figure 6: Indices of stock biomass from the (1) joint Russian-Norwegian Barents Sea ecosystem survey (BESS, since 2004), (2) Norwegian logbook data from the fishery (CPUE), and (3) a historic index based on the annual sum of Norwegian shrimp survey and the Russian survey (1984–2002). Lines show the mean estimates, the shaded area the 95% confidence interval. All indices were standardized to their respective mean.
