Table 3. Model and parameter estimates for models explaining the variance in the relative timing deviations exhibited by Hudsonian godwits during their annual cycle (2009–2012).
Model | Parameters | Random Effects | Fixed Effects | |||||
K | σ2 | St. Dev. | Variable | β | SE | t | ||
Departure from Beluga River | Prior Breeding Success + Prior # Nests | Ind. | 2.57 | 1.60 | Intercept | −5.23 | 3.05 | −1.72 |
Year | 0.00 | 0.00 | PBS | 2.98 | 1.95 | 1.52 | ||
Res. | 32.91 | 5.74 | P#N | 3.34 | 1.98 | 1.68 | ||
Departure from Saskatchewan | Beluga River Departure | Ind. | 4.92 | 2.22 | Intercept | 0.39 | 1.10 | 0.35 |
Year | 0.00 | 0.00 | BRD | 0.76 | 0.17 | 4.40 | ||
Res. | 52.07 | 7.22 | ||||||
Departure from Amazon | BRD + Sask. Departure | Ind. | 44.60 | 6.68 | Intercept | −0.16 | 1.71 | −0.10 |
Year | 0.00 | 0.00 | BRD | 0.11 | 0.24 | 0.45 | ||
Res. | 49.74 | 7.05 | SAD | 1.02 | 0.16 | 6.21 | ||
Departure from Buenos Aires | SAD + Amazon Departure | Ind. | 36.64 | 6.05 | Intercept | 1.13 | 1.77 | 0.64 |
Year | 0.00 | 0.00 | SAD | 0.03 | 0.23 | 0.15 | ||
Res. | 68.20 | 8.26 | AMD | 0.73 | 0.17 | 4.34 | ||
Arrival in Chiloe | AMD + Buenos Aires Departure | Ind. | 1.31 | 1.15 | Intercept | −0.39 | 0.68 | −0.57 |
Year | 0.00 | 0.00 | AMD | −0.00 | 0.08 | −0.01 | ||
Res. | 18.74 | 4.33 | BAD | 0.97 | 0.07 | 14.5 | ||
Departure from Chiloe | BAD + Arrival in Chiloe | Ind. | 3.54 | 1.88 | Intercept | −0.25 | 0.53 | −0.46 |
Year | 0.00 | 0.00 | BAD | −0.03 | 0.10 | −0.33 | ||
Res. | 4.16 | 2.04 | ACH | 0.05 | 0.09 | 0.55 | ||
Arrival in Beluga River | Chiloé Departure + N.A. Arr. + #Stops + Avg. Stop. Duration | Ind. | 1.24 | 1.11 | Intercept | −8.05 | 2.10 | −3.84 |
Year | 0.88 | 0.94 | CHD | 0.25 | 0.24 | 1.06 | ||
Res. | 2.80 | 1.67 | NAA | 0.39 | 0.23 | 1.69 | ||
Stops | 2.19 | 0.51 | 4.33 | |||||
ASD | 0.32 | 0.11 | 2.85 |
Bold-font variance and t-statistic values were determined to be significant at P<0.05 (n = 26).