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mortality coefficient

См. также в других словарях:

  • coefficient of decrease — the ratio of number of deaths per unit of time to population abundance during that time, if all deceased fish were to be immediately replaced so that population does not change. Also called instantaneous rate of total mortality …   Dictionary of ichthyology

  • annual total mortality rate — (seasonal total mortality rate) The number of fish which die during a year (or season), divided by the initial number. Also called: actual mortality rate, coefficient of mortality …   Fisheries — dictionary

  • annual total mortality rate — the number of fish which die during a year divided by the initial number. Also called actual mortality rate, coefficient of mortality. Abbreviated as A …   Dictionary of ichthyology

  • total mortality rate — the number of fish which die during a year or season, divided by the initial number. Also called actual mortality rate, coefficient of mortality. Abbreviated as Z …   Dictionary of ichthyology

  • instantaneous rate of mortality — The natural logarithm (with sign changed) of the survival rate. The ratio of number of deaths per unit of time to population abundance during that time, if all deceased fish were to be immediately replaced so that population does not change. Also …   Fisheries — dictionary

  • instantaneous rate of mortality — The natural logarithm (with sign changed) of the survival rate. The ratio of number of deaths per unit of time to population abundance during that time, if all deceased fish were to be immediately replaced so that population does not change. Also …   Fisheries — dictionary

  • catchability coefficient — force of fishing mortality (the extent to which a stock is susceptible to fishing; quantitatively, the proportion of the stock removed by a defined unit of fishing effort. In pelagic fishes, an inverse function of stock biomass. When it is 0.01… …   Dictionary of ichthyology

  • fishing coefficient — rate of exploitation (the fraction, by number, of the fish in a population at a given time, which is caught and killed by man during the year immediately following (= FA/Z when fishing and mortality are concurrent). The term may also be applied… …   Dictionary of ichthyology

  • force of fishing mortality — the extent to which a stock is susceptible to fishing; quantitatively, the proportion of the stock removed by a defined unit of fishing effort. In pelagic fishes, an inverse function of stock biomass. When it is 0.01 or less it can be used as an… …   Dictionary of ichthyology

  • instantaneous rate of mortality — the natural logarithm (with sign changed) of the survival rate. The ratio of number of deaths per unit of time to population abundance during that time, if all deceased fish were to be immediately replaced so that population does not change… …   Dictionary of ichthyology

  • instantaneous rate of total mortality — the ratio of number of deaths per unit of time to population abundance during that time, if all deceased fish were to be immediately replaced so that population does not change. Also called coefficient of decrease …   Dictionary of ichthyology

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