Can we reestablish a self-sustaining population? A case study on reintroduced Crested Ibis with population viability analysis

Table 2 Results of different model parameters during the next 50 years and sensitivity analysis

Description	Growth rate (r ± SD)	Extinction probability (%)	Final population size	Sensitivity index (S_x)
Present conditions	0.084 ± 0.071	0	367	–
K = 840	0.083 ± 0.069	0	724	0.9728
K = 210	0.081 ± 0.080	0	178	1.0300
Females:males = 1:2	0.085 ± 0.091	0	353	− 0.1142
Females:males = 2:1	0.024 ± 0.071	0	286	0.6608
Females:males = 1:3	0.034 ± 0.092	0	286	− 0.4414
Females:males = 3:1	− 0.017 ± 0.085	1	82	1.5531
Females:males = 1:4	− 0.012 ± 0.098	6	114	− 1.1490
Females:males = 4:1	− 0.037 ± 0.098	13	28	1.5395
10% higher frequency of catastrophes	0.080 ± 0.073	0	358	− 0.2452
10% lower frequency of catastrophes	0.087 ± 0.070	0	362	0.1362
50% higher frequency of catastrophes	0.066 ± 0.081	0	350	− 0.0926
50% lower frequency of catastrophes	0.100 ± 0.061	0	371	− 0.0218
10% higher adult mortality	0.081 ± 0.073	0	362	− 0.1362
10% lower adult mortality	0.088 ± 0.071	0	363	0.1090
10% higher subadult mortality	0.081 ± 0.072	0	362	− 0.1362
10% lower subadult mortality	0.086 ± 0.071	0	361	0.1635
10% higher fledgling mortality	0.069 ± 0.073	0	352	− 0.4087
10% lower fledgling mortality	0.096 ± 0.072	0	370	− 0.0817

ISSN: 2053-7166