Netherlands Institute for Fisheries Research (RIVO)

The estimated total number of herring, mean weight, mean length and biomass per age and maturity stage in each of the surveyed strata are given in Table 6 and 7 for North Sea

Survey strata used to pool length frequency distributions of herring and to raise NASC’s by rectangle to numbers and biomass during the July 2012 North Sea herring acoustic survey

Mean length, mean weight, biomass (thousands of tonnes) and numbers (millions) breakdown by age and maturity per stratum obtained during the July 2003 North Sea hydro acoustic

Abundance indices (numbers in millions) for the main areas of the Barents Sea from acoustic survey winter 2018 estimated by StoX software... Abundance indices (numbers in millions)

Abundance indices (numbers in millions) for the main areas of the Barents Sea from acoustic survey winter 2020 estimated by StoX software.. 2 Based on ratio between unraised biomass

Herring mean length, mean weight, numbers (millions) and biomass (thousands of tonnes) by age and maturity stages in the herring stocks in the Norwegian survey

Table 1 Total numbers (millions of fish) and biomass (thousands of tonnes) of North Sea autumn spawning herring in the area surveyed in the acoustic surveys July 2003, with

Abundance indices (I) at length with standard error of mean (S) from bottom trawl hauls for main areas of the Barents Sea winter 2004 (numbers in millions).. 1 Abundance