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Table 3 Gray Catbird (Dumetella carolinesis) apparent annual survivorship model comparison

From: Migration ecology of western gray catbirds

Model Parameters AICc ΔAIC Weight Deviance
Montana (n = 741)
 ϕ (sex) p (site) 5 496.4 0.00 0.93 159.9
 ϕ (sex) p (.) 4 503.0 6.56 0.04 130.5
 ϕ (site) p (sex) 5 503.7 7.27 0.02 167.2
 ϕ (sex) p (sex) 6 506.8 10.36 0.01 130.2
 ϕ (.) p (sex) 4 511.3 14.91 0.00 138.9
 ϕ (TSM) p (sex) 5 513.3 16.94 0.00 138.9
 ϕ (TSM) p (.) 3 552.4 56.00 0.00 65.2
 ϕ (site) p (.) 3 596.4 100.00 0.00 124.3
 ϕ (.) p (site) 3 596.5 100.14 0.00 124.4
 ϕ (site) p (site) 4 598.2 101.76 0.00 124.0
 ϕ (TSM) p (site) 4 598.6 102.17 0.00 124.4
 ϕ (.) p (.) 2 600.7 104.20 0.00 115.4
British Columbia (n = 537)
 ϕ (sex) p (sex) 6 709.2 0.00 0.98 119.2
 ϕ (sex) p (.) 4 718.1 8.91 0.01 132.1
 ϕ (sex) p (site) 5 719.4 10.16 0.01 164.3
 ϕ (site) p (sex) 5 724.0 14.82 0.00 169.0
 ϕ (.) p (sex) 4 724.2 15.00 0.00 138.2
 ϕ (TSM) p (sex) 5 726.1 16.91 0.00 138.1
 ϕ (TSM) p (.) 3 813.4 104.24 0.00 51.1
 ϕ (TSM) p (site) 4 815.4 106.22 0.00 76.4
 ϕ (.) p (.) 2 836.7 127.48 0.00 76.4
 ϕ (site) p (.) 3 838.5 129.34 0.00 101.6
 ϕ (.) p (site) 3 838.6 129.45 0.00 101.7
 ϕ (site) p (site) 4 839.7 130.48 0.00 100.7
  1. Models for the apparent annual survivorship of Gray Catbirds in the South Okanagan Valley, British Columbia, Canada, and the Bitterroot River Valley, Montana, USA. Cormack-Jolly-Seber models were used, which include annual survivorship (ϕ) and detection probability (p). TSM is a time-since-marking approach whereby the first encounter is separated from separate encounters to factor in young and transient individuals. Intercept only models are designated by (.)