Table 3. Results of the Generalised Additive Mixed Models (GAMMs) on body mass growth, with sex and treatment fitted either as intercept, curve shape or both (all combinations tested).

Model	Intercept	Curve shape	ΔAIC	df	Weight
1	Sex	Sex	0.0	11	0.8430
8	Treatment + sex	Sex	3.5	14	0.1497
3	–	Sex	9.9	10	0.0061
2	Treatment	Sex	13.2	13	0.0012
11	Sex	–	77.6	9	<0.001
9	Treatment + sex	–	81.6	12	<0.001
12	–	–	91.2	8	<0.001
10	Treatment	–	95.0	11	<0.001
5	Sex	Treatment	147.9	15	<0.001
7	Treatment + sex	Treatment	151.7	18	<0.001
6	–	Treatment	161.2	14	<0.001
4	Treatment	Treatment	165.5	17	<0.001

Note:

A total of 12 GAMMs were fitted and ranked based on their AIC, from the lowest to the highest. Weight: Akaike’s weight.