Table 5.
Effects of capture date, sex, weight, body size index, mass index, and AIV infection status on springtime departure date of ruddy turnstones and sanderlings from Delaware Bay, by species and year, using the proportional hazards model. P-values of significant effects are bolded.
| Ruddy Turnstone 2007 |
Ruddy Turnstone 2008 |
Sanderling 2008 |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Variable | n | Log-rank χ2 | df | P-value | n | Log-rank χ2 | df | P-value | n | Log-rank χ2 | df | P-value |
| Capture date | 30 | 8.4 | 2 | 0.015 | 30 | 0.2 | 2 | 0.917 | 20 | 3.5 | 3 | 0.316 |
| Sex | 30 | 1.7 | 1 | 0.194 | 28 | 0.1 | 1 | 0.755 | n/a | n/a | n/a | n/a |
| WeightA | 30 | 5.4 | 5 | 0.375 | 30 | 12.1 | 4 | 0.016 | 19 | 12.5 | 3 | 0.006 |
| BSIB | 30 | 7.8 | 5 | 0.170 | 30 | 6.4 | 5 | 0.269 | 19 | 16.2 | 4 | 0.003 |
| MIA | 30 | 3.6 | 4 | 0.467 | 30 | 13.6 | 3 | 0.004 | 19 | 13.8 | 4 | 0.008 |
| AIV status | n/aC | n/a | n/a | n/a | 29 | 0.9 | 1 | 0.351 | n/aC | n/a | n/a | n/a |
A
By 10-g class.
B
By SD class.
C
No AIV were isolated from radiotagged ruddy turnstones in 2007 or from sanderlings in 2008.