Nothing
`leslie.row1` <-
function(mx,px, L=NULL, SRB=1.05, peryear=5, one.sex=TRUE){
# takes the maternity function mx, and survivorship function
# Lx and returns the fertilities for the first row of a Leslie
# matrix
#
# maternity function is yearly expected number of births
if(is.null(L)) s <- sqrt(px[1]) * peryear
else s <- L
k <- length(px)+1
Fx <- NULL
for(i in 1:k-1){
Fx[i] <- s * (mx[i] + px[i]*mx[i+1])/2
}
Fx[k] <- mx[k]/2
if(one.sex) Fx <- Fx/(1+SRB)
Fx
}
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