Ecological Archives E096-085-A2

J. Balbontín and A. P. Mřller. 2015. Environmental conditions during early life accelerate the rate of senescence in a short-lived passerine bird. Ecology 96:948–959. http://dx.doi.org/10.1890/14-1274.1

Appendix B. List of top models for the effect of early life investment in reproduction and early life environmental conditions on ALR in barn swallows in Denmark.

Table B1: Response variable: Age at last Reproduction (ALR) (only females). Early life investment in reproduction was the No. eggs produced at the age of one year (i.e., E1Y). 64 models form the full set of models performed. 13 models were selected within Delta AICc < 6.0. CS is colony size (i.e. the number of breeding pairs in a given breeding site). Cats are the number of cats at breeding sites the year when swallows were one year old.

Candidate models

df

AICc

Delta

Weight

Cats+CS+Cats*CS

7

1732.76

0.00

0.30

Cats+CS+E1Y+Cats*CS

8

1734.11

1.35

0.15

Cats

5

1734.26

1.50

0.14

Cats+E1Y

6

1735.80

3.04

0.07

Cats+CS+E1Y+Cats*CS+CS*E1Y

9

1735.86

3.10

0.06

Cats+CS+E1Y+Cats*CS+Cats*E1Y

9

1736.15

3.39

0.05

Cats+CS

6

1736.29

3.52

0.05

Null model

4

1736.31

3.55

0.05

Cats+E1Y+Cats*E1Y

7

1737.40

4.64

0.03

E1Y

5

1737.57

4.81

0.03

Cats+CS+E1Y

7

1737.77

5.01

0.02

Cats+CS+E1Y+Cats*CS+Cats*E1Y+CS*E1Y

10

1737.91

5.15

0.02

CS

5

1738.33

5.57

0.02

Table B2. Estimated variance of random terms of mixed-effects models performed without covariates for the effects of early life environmental conditions and early life investment in reproduction (E1Y) on ALR of barn swallows from Denmark. Number of observations was 631 taken from 631 different individuals in 25 breeding sites during 20 years. Estimated variances were close to zero. A GLM gave the same results than the linear mixed-effect model in this case.

Groups

Name

Variance

SD

Breeding site

Intercept

0.00000

0.0000

Year

Intercept

0.00000

0.0000

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