fishery mortality rate
a measure of how quickly fish are removed from a population. Fishing mortality rates greater than 1.0 are considered very high

Dictionary of ichthyology. 2009.

Look at other dictionaries:

  • 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

  • rate of fishing — instantaneous rate of fishing mortality (the decrease in numbers of fish over time when fishing and natural mortality act concurrently (Nt No * e^ Zt , where No is the initial number and Nt is the number of the remaining fish at the end of time t …   Dictionary of ichthyology

  • rate of natural increase — instantaneous rate of surplus production (equal to rate of growth plus rate of recruitment less rate of natural mortality all in terms of weight and on an instantaneous basis. In a balanced or equilibrium fishery, this increment replaces what is… …   Dictionary of ichthyology

  • instantaneous rate of fishing mortality — used to describe the decrease in numbers of fish over time when fishing and natural mortality act concurrently (Nt = No * e^ Zt , where No is the initial number and Nt is the number of the remaining fish at the end of time t. Z is the… …   Dictionary of ichthyology

  • Morbidity and Mortality Weekly Report — This article is about weekly publication of the Centers for Disease Control and Prevention. For other uses of the term mobidity and mortality , see Morbidity and mortality. The Morbidity and Mortality Weekly Report (ISSN 0149 2195) is a… …   Wikipedia

  • natural mortality — a measure of the rate of removal of fish from a population from natural causes, not through fishing. Includes predation, cannibalism, senility, disease, pollution, etc. The balance that must be struck between natural mortality and fishing… …   Dictionary of ichthyology

  • fishing mortality — deaths or removal of fish from a population due to fishing. Usually expressed as the annual mortality, the percentage of fish dying in one year, or the instantaneous rate F, the percentage of fish dying at one time. F can range from 0 for no… …   Dictionary of ichthyology

  • instantaneous rate of surplus production — Equal to rate of growth plus rate of recruitment less rate of natural mortality all in terms of weight and on an instantaneous basis. In a balanced or equilibrium fishery, this increment replaces what is removed by fishing, and rate of surplus… …   Fisheries — dictionary

  • instantaneous rate of surplus production — Equal to rate of growth plus rate of recruitment less rate of natural mortality all in terms of weight and on an instantaneous basis. In a balanced or equilibrium fishery, this increment replaces what is removed by fishing, and rate of surplus… …   Fisheries — dictionary

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