Input values for demographic parameters used in rhinoceros auklet simulation models.
| Model parameters . | Estimate . | Source . |
|---|---|---|
| 1st year survival (s₁) | 0.62 (0.034)a | Thayer Mascarenhas (2009) |
| Temporal variability in s₁ | 0.1b | |
| 2nd + year survival (s₂) | 0.893 (0.02)c | Morrison et al. (2011) |
| Temporal variability in s₂ | 0.0001 | Morrison et al. (2011) |
| Productivity (f) | 0.43 (0.001) | Borstad et al. (2011) |
| Temporal variability in f | 0.18 | Borstad et al. (2011) |
| Age at first breeding | 3 | Gaston and Dechesne (2020) |
| Breeding propensity (bp) | 1 | Kyle Elliot (personal communication) |
| Population size | 200 000d | Rodway et al. (2017) |
| Average annual gillnet entanglement mortality | 641e | Bertram et al. (2021) |
| Derived parameters | ||
| Initial population size: 1st year (N₁) | 54 899f | |
| Initial population size: 2nd year (N₂) | 35 046f | |
| Initial population size: 3rd + year (N3+) | 400 000f | |
| Model parameters . | Estimate . | Source . |
|---|---|---|
| 1st year survival (s₁) | 0.62 (0.034)a | Thayer Mascarenhas (2009) |
| Temporal variability in s₁ | 0.1b | |
| 2nd + year survival (s₂) | 0.893 (0.02)c | Morrison et al. (2011) |
| Temporal variability in s₂ | 0.0001 | Morrison et al. (2011) |
| Productivity (f) | 0.43 (0.001) | Borstad et al. (2011) |
| Temporal variability in f | 0.18 | Borstad et al. (2011) |
| Age at first breeding | 3 | Gaston and Dechesne (2020) |
| Breeding propensity (bp) | 1 | Kyle Elliot (personal communication) |
| Population size | 200 000d | Rodway et al. (2017) |
| Average annual gillnet entanglement mortality | 641e | Bertram et al. (2021) |
| Derived parameters | ||
| Initial population size: 1st year (N₁) | 54 899f | |
| Initial population size: 2nd year (N₂) | 35 046f | |
| Initial population size: 3rd + year (N3+) | 400 000f | |
Specific details regarding the derivation and use of model parameters can be found in the “Methods” section. Uncertainty in demographic parameter estimates, where available, is reported as standard error.
Uncertainty in estimates reported as SE and temporal variability reported as SD.
Mean survival is calculated at 70% of adult survival.
Determined using expert opinion based on estimates from puffins.
Mean survival rate estimate increased to produce stable population.
Breeding pairs; estimate from the 1980s.
Number of individuals.
Calculated as stable age distribution based on population size.
Input values for demographic parameters used in rhinoceros auklet simulation models.
| Model parameters . | Estimate . | Source . |
|---|---|---|
| 1st year survival (s₁) | 0.62 (0.034)a | Thayer Mascarenhas (2009) |
| Temporal variability in s₁ | 0.1b | |
| 2nd + year survival (s₂) | 0.893 (0.02)c | Morrison et al. (2011) |
| Temporal variability in s₂ | 0.0001 | Morrison et al. (2011) |
| Productivity (f) | 0.43 (0.001) | Borstad et al. (2011) |
| Temporal variability in f | 0.18 | Borstad et al. (2011) |
| Age at first breeding | 3 | Gaston and Dechesne (2020) |
| Breeding propensity (bp) | 1 | Kyle Elliot (personal communication) |
| Population size | 200 000d | Rodway et al. (2017) |
| Average annual gillnet entanglement mortality | 641e | Bertram et al. (2021) |
| Derived parameters | ||
| Initial population size: 1st year (N₁) | 54 899f | |
| Initial population size: 2nd year (N₂) | 35 046f | |
| Initial population size: 3rd + year (N3+) | 400 000f | |
| Model parameters . | Estimate . | Source . |
|---|---|---|
| 1st year survival (s₁) | 0.62 (0.034)a | Thayer Mascarenhas (2009) |
| Temporal variability in s₁ | 0.1b | |
| 2nd + year survival (s₂) | 0.893 (0.02)c | Morrison et al. (2011) |
| Temporal variability in s₂ | 0.0001 | Morrison et al. (2011) |
| Productivity (f) | 0.43 (0.001) | Borstad et al. (2011) |
| Temporal variability in f | 0.18 | Borstad et al. (2011) |
| Age at first breeding | 3 | Gaston and Dechesne (2020) |
| Breeding propensity (bp) | 1 | Kyle Elliot (personal communication) |
| Population size | 200 000d | Rodway et al. (2017) |
| Average annual gillnet entanglement mortality | 641e | Bertram et al. (2021) |
| Derived parameters | ||
| Initial population size: 1st year (N₁) | 54 899f | |
| Initial population size: 2nd year (N₂) | 35 046f | |
| Initial population size: 3rd + year (N3+) | 400 000f | |
Specific details regarding the derivation and use of model parameters can be found in the “Methods” section. Uncertainty in demographic parameter estimates, where available, is reported as standard error.
Uncertainty in estimates reported as SE and temporal variability reported as SD.
Mean survival is calculated at 70% of adult survival.
Determined using expert opinion based on estimates from puffins.
Mean survival rate estimate increased to produce stable population.
Breeding pairs; estimate from the 1980s.
Number of individuals.
Calculated as stable age distribution based on population size.
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