pmat_w: Probability of maturity logistic function using quartile...

In marchtaylor/fishdynr: Fisheries science related population dynamics models

Description

pmat_w describes the probability of maturity as a function of the size when 50% of the individuals in a population are mature and the width (in size) between 25% and 75% probability of maturity quartiles (after Heino et al. 2002).

Usage

pmat_w(Lt, Lmat, wmat)

Arguments

Lt	size for probability of maturity calculation
Lmat	size at 50% probability of maturity (i.e. "massive maturity")
wmat	width (in size) between 25% and 75% probability of maturity quartiles

References

Heino M, Dieckmann U, Godo OR (2002) Measuring probabilistic reaction norms for age and size at maturation. Evolution 56: 669-678.

Examples

L <- seq(1,20,0.1)
pmat1 <- pmat_w(L, Lmat=10, wmat=5)
pmat2 <- pmat_w(L, Lmat=10, wmat=2)
plot(L, pmat1, t="l", ylab="prob. of maturity")
lines(L, pmat2, lty=2)
legend("bottomright", legend=c("Lmat=10; wmat=5", "Lmat=10; wmat=2"), 
 col=1, lty=1:2, bty="n")

marchtaylor/fishdynr documentation built on May 21, 2019, 11:27 a.m.