Survival models of Greater Sage-Grouse in northwestern South Dakota and USA, 2016–2017, from model set 2 evaluating effects of the year (2016 or 2017) and age (juvenile or adult) on survival. Akaike’s Information Criterion corrected for small sample size (AICc; Burnham and Anderson 2002); lowest AICc value = 203.62. ΔAICc is the difference in AICc relative to minimum AICc, wi is Akaike weight (Burnham and Anderson 2002) calculated across all models, and k is the number of parameters.
| Modela . | ΔAICc . | wi . | k . | Deviance . |
|---|---|---|---|---|
| {S(Pre(.), Nest(.) = EBR(.)+LBR(.) + YEAR} | 0.00 | 0.32 | 3 | 197.60 |
| {Pre(.), Nest(.) = EBR(.) = LBR(.)} | 0.02 | 0.32 | 2 | 199.63 |
| {S(Pre(.), Nest(.) = EBR(.) = LBR(.) + AGE} | 1.60 | 0.14 | 3 | 199.20 |
| {S(Pre(.), Nest(.) = EBR(.)+LBR(.) + YEAR + AGE} | 2.01 | 0.12 | 4 | 197.60 |
| {S(.)} | 2.29 | 0.10 | 1 | 203.91 |
| {S(t)} | 26.33 | 0.00 | 24 | 180.95 |
| {S(t + YEAR + AGE)} | 28.56 | 0.00 | 26 | 179.00 |
| Modela . | ΔAICc . | wi . | k . | Deviance . |
|---|---|---|---|---|
| {S(Pre(.), Nest(.) = EBR(.)+LBR(.) + YEAR} | 0.00 | 0.32 | 3 | 197.60 |
| {Pre(.), Nest(.) = EBR(.) = LBR(.)} | 0.02 | 0.32 | 2 | 199.63 |
| {S(Pre(.), Nest(.) = EBR(.) = LBR(.) + AGE} | 1.60 | 0.14 | 3 | 199.20 |
| {S(Pre(.), Nest(.) = EBR(.)+LBR(.) + YEAR + AGE} | 2.01 | 0.12 | 4 | 197.60 |
| {S(.)} | 2.29 | 0.10 | 1 | 203.91 |
| {S(t)} | 26.33 | 0.00 | 24 | 180.95 |
| {S(t + YEAR + AGE)} | 28.56 | 0.00 | 26 | 179.00 |
a Pre = pre-nesting season (April 1–21), Nest = nesting season (April 22 to June 9), EBR = early brood-rearing season (June 10 to July 28), LBR = late brood-rearing season (July 29 to September 15), Non-nest = pre-nesting, early brood rearing, and late brood rearing, Non-EBR = Pre-nesting, nesting, and late brood rearing, YEAR = study year, 2016 or 2017, AGE = juvenile or adult, (.) = constant survival, “=” seasons were set equal to one another.
Survival models of Greater Sage-Grouse in northwestern South Dakota and USA, 2016–2017, from model set 2 evaluating effects of the year (2016 or 2017) and age (juvenile or adult) on survival. Akaike’s Information Criterion corrected for small sample size (AICc; Burnham and Anderson 2002); lowest AICc value = 203.62. ΔAICc is the difference in AICc relative to minimum AICc, wi is Akaike weight (Burnham and Anderson 2002) calculated across all models, and k is the number of parameters.
| Modela . | ΔAICc . | wi . | k . | Deviance . |
|---|---|---|---|---|
| {S(Pre(.), Nest(.) = EBR(.)+LBR(.) + YEAR} | 0.00 | 0.32 | 3 | 197.60 |
| {Pre(.), Nest(.) = EBR(.) = LBR(.)} | 0.02 | 0.32 | 2 | 199.63 |
| {S(Pre(.), Nest(.) = EBR(.) = LBR(.) + AGE} | 1.60 | 0.14 | 3 | 199.20 |
| {S(Pre(.), Nest(.) = EBR(.)+LBR(.) + YEAR + AGE} | 2.01 | 0.12 | 4 | 197.60 |
| {S(.)} | 2.29 | 0.10 | 1 | 203.91 |
| {S(t)} | 26.33 | 0.00 | 24 | 180.95 |
| {S(t + YEAR + AGE)} | 28.56 | 0.00 | 26 | 179.00 |
| Modela . | ΔAICc . | wi . | k . | Deviance . |
|---|---|---|---|---|
| {S(Pre(.), Nest(.) = EBR(.)+LBR(.) + YEAR} | 0.00 | 0.32 | 3 | 197.60 |
| {Pre(.), Nest(.) = EBR(.) = LBR(.)} | 0.02 | 0.32 | 2 | 199.63 |
| {S(Pre(.), Nest(.) = EBR(.) = LBR(.) + AGE} | 1.60 | 0.14 | 3 | 199.20 |
| {S(Pre(.), Nest(.) = EBR(.)+LBR(.) + YEAR + AGE} | 2.01 | 0.12 | 4 | 197.60 |
| {S(.)} | 2.29 | 0.10 | 1 | 203.91 |
| {S(t)} | 26.33 | 0.00 | 24 | 180.95 |
| {S(t + YEAR + AGE)} | 28.56 | 0.00 | 26 | 179.00 |
a Pre = pre-nesting season (April 1–21), Nest = nesting season (April 22 to June 9), EBR = early brood-rearing season (June 10 to July 28), LBR = late brood-rearing season (July 29 to September 15), Non-nest = pre-nesting, early brood rearing, and late brood rearing, Non-EBR = Pre-nesting, nesting, and late brood rearing, YEAR = study year, 2016 or 2017, AGE = juvenile or adult, (.) = constant survival, “=” seasons were set equal to one another.
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