virgin biomass
The biomass of a stock that has not been fished (also called the unfished or unexploited biomass).

Fisheries — dictionary. . 2004.

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  • 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 …   Dictionary of ichthyology

  • virgin stock — a stock of fish that is never caught by fishing. Growth and recruitment add biomass while death removes biomass. The biomass stays steady apart from natural fluctuations caused by good and bad years a stock in its natural condition before anyone… …   Dictionary of ichthyology

  • B 20% B-virg — level of spawning stock corresponding to a fraction (here 20%) of the unexploited biomass. Virgin biomass is estimated as the point where the replacement line for F=0 intersects the stock recruitment relationship or as the biomass from a spawning …   Dictionary of ichthyology

  • carrying capacity — 1) the biomass of a population or the number and type of species that a given environment can sustain over the long term. May refer to level of use, at a given level of management, which a natural or man made resource can sustain itself over long …   Dictionary of ichthyology

  • EN 14214 — is an international standard that describes the minimum requirements for Biodiesel.Biodiesel is a fuel, comparable to petrodiesel, that is produced, not from a fossil fuel, but from a renewable fuel such as rapeseed, soy, jatropha or other virgin …   Wikipedia

  • Biofuel — Information on pump regarding ethanol fuel blend up to 10%, California …   Wikipedia

  • Algae fuel — might be an alternative to fossil fuel and uses algae as its source of natural deposits. Several companies and government agencies are funding efforts to reduce capital and operating costs and make algae fuel production commercially viable.[1]… …   Wikipedia

  • Business and Industry Review — ▪ 1999 Introduction Overview        Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …   Universalium

  • Biodiesel — This article is about transesterified lipids. For hydrogenated alkane renewable diesel, see Vegetable oil refining. For biomass and organic waste to fuel production, see Biomass to liquid. For unmodified vegetable oil used as motor fuel, see… …   Wikipedia

  • Forest — This article is about a community of trees. For other uses, see Forest (disambiguation). A conifer forest in the Swiss Alps (National Park) …   Wikipedia

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