InstantaneousFishingMortalityRate: Instantaneous fishing mortality rate (F)

In nmfs-fish-tools/data_dictionary: Collaborative tool to improve consistency in terminology and develop a framework of tools for fisheries science.

Instantaneous fishing mortality rate (F)

Description

Instantaneous annual exponential rate at which fish are being removed from the population due to fishing. Many other platforms distinguish between different F. For example, looking at ASAP, we have Average F (across a certain age range), Total F (by age), N-weighted, B-weighted. ICES calls Average F Fbar. I think these both (SAM definitely does) incorporate selectivity. Apical F - at the peak of selectivity curve?

Usage

InstantaneousFishingMortalityRate

Format

Examples

Fun (ICES) is fishing mortality of unwanted catch

Rationale

It is often not clear whether fishing mortality refers to the instantaneous rate or finite rate, where the latter would apply to a fixed time period. Some suggest using upper case for instantaneous rates and lower case for finite rates. For example an F of 0.5 would correspond to 40% of the population being removed or a finite rate of 0.4. Furthermore, F can sometimes pertain to just a range of the age structure and may or may not account for selectivity.

Alternatives

harvest rate, exploitation rate, finite fishing mortality, apical F

Range of possible values

0–Inf

Units

time^{-1}

Source

see

nmfs-fish-tools/data_dictionary documentation built on July 27, 2024, 12:20 p.m.