total mortality

total mortality
mortality attributed to both fishing and natural causes

Dictionary of ichthyology. 2009.

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  • 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

  • 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

  • mortality rates — are critical for determining the abundance of fish populations and the effects of harvesting strategies on yield and spawning potential from a stock. Fish abundance is a balance between the factors that act to increase the stock (births) and… …   Fisheries — dictionary

  • mortality rates — are critical for determining the abundance of fish populations and the effects of harvesting strategies on yield and spawning potential from a stock. Fish abundance is a balance between the factors that act to increase the stock (births) and… …   Fisheries — dictionary

  • seasonal total mortality rate — the number of fish which die during a season from causes other than fishing divided by the initial number (Ricker, 1975). Also called annual mortality rate, annual natural mortality rate, conditional natural mortality rate, seasonal natural… …   Dictionary of ichthyology

  • 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

  • Mortality rate — Crude death rate by country Mortality rate is a measure of the number of deaths (in general, or due to a specific cause) in a population, scaled to the size of that population, per unit time. Mortality rate is typically expressed in units of… …   Wikipedia

  • mortality rate — 1) the rate at which the numbers in a population decrease with time due to various causes. The proportion of the total stock (in numbers) dying each year is the annual mortality rate. To facilitate calculations, mortality is expressed as an… …   Dictionary of ichthyology

  • mortality rate — mortality, mortality rate The death rate, usually standardized by age and sex, to facilitate comparisons between areas and social groups. It provides a measure of health risks, improvements in the quality of health care, and the comparative… …   Dictionary of sociology

  • mortality — mortality, mortality rate The death rate, usually standardized by age and sex, to facilitate comparisons between areas and social groups. It provides a measure of health risks, improvements in the quality of health care, and the comparative… …   Dictionary of sociology

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