Geoscience Reference
In-Depth Information
Figure 9.7
Three examples of possible relationships of recruitment per individual to population
size (N
t
). Typical sigmoid population growth demonstrated by the logistic curve results for
q
= 1. A
steeper curve initially results for
q
= 0.1, whereas a flatter curve initially results for
q
= 10.
by Pennycuick et al. (1968), Usher (1972), and Beddington (1974), taken
from May and Oster (1976):
l
N
t
}}}
1 + exp[-
A
(1 -
N
t
/
B
)]
N
t
+1
=
by Beverton and Holt (1957) and Ricker (1975):
1
k
/
N
t
}
N
t
+1
=
r
+(
and by Maynard-Smith and Slatkin (1973):
