en:ecovirt:roteiro:den_ind:di_ed_base
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| We can test this by simulating several populations with initial size N0=20 and averaging the time they take to reach N=10. Set the simulation to: | We can test this by simulating several populations with initial size N0=20 and averaging the time they take to reach N=10. Set the simulation to: | ||
| - | * ''Maximum time'': 3 | + | * ''Maximum time'': 3 |
| - | * ''Number of simulations'': 1000 | + | * ''Number of simulations'': 1000 |
| - | * ''Initial size'' : 20 | + | * ''Initial size'' : 20 |
| - | * ''birth rate'' : 0 | + | * ''birth rate'' : 0 |
| - | * ''death rate'': 0.693 | + | * ''death rate'': 0.693 |
| The graph will be covered with lots of lines, but we are interested in the value of //Halving time//. Is it near the theoretical value? Now change the population initial size to 80, keeping the other options unchanged and run the simulation again. | The graph will be covered with lots of lines, but we are interested in the value of //Halving time//. Is it near the theoretical value? Now change the population initial size to 80, keeping the other options unchanged and run the simulation again. | ||
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| ====== To learn more ====== | ====== To learn more ====== | ||
| - | * Renshaw, E. (1991). Modelling biological populations in space and time Cambridge University Press. //This tutorial is inspired on the second chapter of this book, which is a great introduction for stochastic models of births and deaths//. | + | * Renshaw, E. (1991). Modelling biological populations in space and time Cambridge University Press. //This tutorial is inspired on the second chapter of this book, which is a great introduction for stochastic models of births and deaths//. |
| - | * Akçakaya H.R., Burgman M.A & Ginzburg, L.V. (1999). [[http://www.ramas.com/apppopn.htm|Applied population ecology - Principles and computer exercises using RAMAS EcoLab]]. //Another very didactic book, with computer exercises using the proprietary software [[http://www.ramas.com/ecolab.htm|RAMAS ecolab]]. The chapter two is a great introduction on the sources of stochasticity in population dynamics.// | + | * Akçakaya H.R., Burgman M.A & Ginzburg, L.V. (1999). [[http://www.ramas.com/apppopn.htm|Applied population ecology - Principles and computer exercises using RAMAS EcoLab]]. //Another very didactic book, with computer exercises using the proprietary software [[http://www.ramas.com/ecolab.htm|RAMAS ecolab]]. The chapter two is a great introduction on the sources of stochasticity in population dynamics.// |
| - | * [[http://cmq.esalq.usp.br/BIE5781/doku.php?id=01-discretas:01-discretas|R tutorials]] about the discrete probability distributions, from the course on [[http://cmq.esalq.usp.br/BIE5781|Statistical Modeling]] of the graduate program in ecology from the University of São Paulo. These include tutorials about the binomial and negative binomial distributions. | + | * [[http://cmq.esalq.usp.br/BIE5781/doku.php?id=01-discretas:01-discretas|R tutorials]] about the discrete probability distributions, from the course on [[http://cmq.esalq.usp.br/BIE5781|Statistical Modeling]] of the graduate program in ecology from the University of São Paulo. These include tutorials about the binomial and negative binomial distributions. |
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