virgin biomass

virgin biomass
a stock\'s theoretical carrying capacity. The average biomass of a stock that has yet not been fished (in an equilibrium sense). Biomass of an unexploited (or quasi unexploited) stock. Rarely measured. Most often inferred from stock modeling. Used as a reference value to assess the relative health of a stock, monitoring changes in the ratio between current and virgin biomass (B/B0). It is usually assumed that, in absence of better data, B
0.30 B0 is a limit below which a stock should not be driven. Abbreviated as B0, Bo or Bv

Dictionary of ichthyology. 2009.

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