Ecological Archives E093-064-A3

Ellen J. Hamann and Brian P. Kennedy. 2012. Juvenile dispersal affects straying behaviors of adults in a migratory population. Ecology 93:733–740.

Appendix C. Parameter estimates (juvenile movement and sex) for models predicting straying occurrence for adult Chinook salmon.

TABLE C1. Parameter estimates and significance levels for the best models predicting straying occurrence. At both spatial scales, models incorporating juvenile movement and/or sex best predicted the likelihood that Big Creek salmon would stray. The odds ratio represents the relative amount by which the odds of an outcome increase or decrease when the value of the predictor variable is increased by one unit.

Model

Parameter

p

Parameter estimate

SE

Odds ratio

1, Fine-scale

Intercept

0.0168*

1.0498

0.4392

2.86

 

Juvenile movement (low)

0.0002*

-2.0402

0.5462

0.13

2, Fine-scale

Intercept

0.0167*

1.3097

0.5471

3.70

 

Sex (male)

0.4007

-0.4463

0.5311

0.64

 

Juvenile movement (low)

0.0002*

-2.0884

0.5553

0.12

1, Coarse-scale

Intercept

0.0130*

-2.5897

1.0420

0.08

 

Sex (male)

0.0261*

2.4996

1.1235

12.18

 

Juvenile movement (low)

0.0062*

-2.3998

0.8767

0.09

*Significant at α ≤ 0.05.


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