get_dz: Derivative of z (function to minimize)

In ktmurray1219/mmrefpoints: Project Marine Mammal Populations and Calculate Reference Points

Description

Derivative of z (function to minimize)

Usage

get_dz(z, MNPL, lh.params)

Arguments

z	the degree of compensation
MNPL	desired maximum net productivity level
lh.params	a list of life history parameters (juvenile survival S0, adult survival S1plus, age at maturity AgeMat, plus group age, max theoretical fecundity fmax, and maximum steady rate of increase (population growth rate) lambdaMax)

Value

The difference between the MNPL associated with the value of z that the user defined and the MNPL that the user has defined.

Examples

get_dz(z = 2.39, MNPL = 0.5, 
lh.params = list(S0 = 0.944, S1plus = 0.99, 
AgeMat = 17, nages = 19, 
lambdaMax = 1.04, K1plus = 9000))

ktmurray1219/mmrefpoints documentation built on Dec. 21, 2021, 8:40 a.m.