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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