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| def invasion_fitness(z, zm, pars): | |
| n_res = z / pars | |
| return zm - pars * n_res | |
| def invasion_fitness2(z, zm, pars): | |
| alpha, beta = pars | |
| n_res = (z - z**beta) / alpha | |
| return zm - zm**beta - alpha * n_res | |
| def pop_dynamics2(t, n, pars): | |
| alpha, beta, z = pars | |
| return n * (z - z**beta - alpha * n) | |
| def invasion_fitness3(z, zm, pars): | |
| z0, k = pars | |
| r = np.exp(-((z - z0) ** 2) / 2) | |
| n_res = r | |
| rm = np.exp(-((zm - z0) ** 2) / 2) | |
| am = np.exp(-((zm - z) ** 2) / k) | |
| return rm - am * n_res | |