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Table 2 Model averaged growth curve results from a non-linear mixed effects model of growth.

From: Food supplements increase adult tarsus length, but not growth rate, in an island population of house sparrows (Passer domesticus)

Model Parameter

Coefficient

95% Confidence Interval

Summed Weight

A (Intercept)

27.91

25.56-30.25

N/A

A ~ Sex (Male)

1.03

0.31-1.75

0.96

A ~ Brood Size

-0.64

-1.26--0.03

0.99

A ~ Treatment (Fed)

0.04

-1.09-1.16

0.35

A ~ Mid-Season

-1.07

-2.89-0.75

0.99

A ~ Late-Season

-0.44

-1.76-0.88

0.99

A ~ 2008

1.23

-1.02-3.48

0.08

A ~ 2009

-1.15

-2.85-0.56

0.08

B (Intercept)

12.20

11.47-12.92

NA

K (Intercept)

0.365

0.190-0.541

NA

K ~ Sex (Male)

-0.001

-0.018-0.016

0.96

K ~ Brood Size

-0.009

-0.023-0.006

0.99

K ~ Treatment (Fed)

0.011

-0.017-0.039

0.35

K ~ Mid-Season

0.090

0.009-0.172

0.99

K ~ Late-Season

0.100

0.012-0.190

0.99

K ~ 2008

0.100

0.061-0.139

0.08

K ~ 2009

0.110

0.071-0.149

0.08

  1. The intercept represents a female reared in the control group. n = 261 chicks from 103 broods. Summed weight represents the summed AIC weight of all models that include a particular parameter within the total set of candidate models. Where A is the asymptotic size, K the rate constant of the equation and B is the constant of integration