estrhov: Estimate the Volumetric Fish Density

In JVAdams/EchoNet2Fish: Estimate Fish Abundance from Acoustic Echoes and Net Catch

Description

Estimate the volumetric fish density in number per m^3.

Usage

estrhov(Sv, sigmabs)

Arguments

Sv	Numeric vector, volume backscattering strength in dB.
sigmabs	Numeric vector, backscattering cross-section in m^2, same length as Sv.

Details

The volumetric fish density (in #/m^3) is estimated as rhov = sv/sigmabs, where the volume backscattering coefficient (in 1/m) is sv = 10^(Sv/10). (Note distinction between upper and lower case S in Sv and sv.)

Value

A numeric vector the same length as Sv containing the estimated volumetric fish density in number per m^3.

See Also

estNv

Examples

mySv <- c(-71, -65, -89)
mysigma <- c(6e-4, 3e-5, 2e-6)
estrhov(Sv=mySv, sigmabs=mysigma)

JVAdams/EchoNet2Fish documentation built on Feb. 15, 2021, 4:27 a.m.