Theory and Modern Applications
Table 1 Definition of model variables and parameters, adapted from [ 25 ]
From: Evolutionary consequences of age-specific harvesting: age at first reproduction
Notation | Description | Range of value |
|---|---|---|
Variables | ||
\(N_{0}\) | Density of newborn individuals | |
\(N_{1}\) | Density of juvenile individuals | |
\(N_{2}\) | Density of small adult individuals | |
\(N_{3}\) | Density of large adult individuals | |
Parameters | ||
γ | Probability of early reproduction | [0,1] |
\(f_{2}\) | Per capita annual fecundity of early reproducing individuals at age 2 years old | |
\(f_{3}\) | Per capita annual fecundity of late reproducing individuals at age greater than or equal to 3 years old | |
\(\tilde{f}_{3}\) | Per capita annual fecundity of early reproducing individuals at greater than or equal to 3 years old | |
\(h_{i}\) | Per capita annual harvest proportion of individuals at age i (i = 1,2,3) | [0,1] |
c | Proportional reduction is measured by a cost | |
m | Constant that determines how strongly the survival of newborn is adversely affected by density in this age class | |
\(s_{i}\) | Per capita annual survival probabilities of individuals at age i (i = 0,1,2,3) | [0,1] |