Table 1. Degree of fit of each models for abundance, male size, female size and sex ratio.

	Africorchestia quadrispinosa				Talorchestia capensis
Model	RSS	5th percentile	AIC	AICwt	RSS	5th percentile	AIC	AICwt
(a) abundance
No	1.0092	0.2927	−76.24	0.00	0.2412	0.0104	−112	0.00
I.Q.	1.0007	0.0427	−76.46	0.00	0.0715	0.0041	−142.4	0.00
A.E.	0.4974	0.0125	−89.93	0.00	0.1282	0.0495	−123.8	0.00
R.N.	0.0701*	0.1385	−142.9	1.00**	0.2402	0.0091	−112.1	0.00
R.S.	1.1308	0.0149	−73.4	0.00	0.0032	0.0010	−220.1	1.00
(b) male size
No	6.0077	5.2794	−31.65	0.00	2.6125	2.4092	−52.46	0.00
I.Q.	2.6588	2.155	−52.02	0.00	1.9407	1.6826	−59.9	0.19
A.E.	1.6798	1.558	−59.5	0.00	3.4973	2.9577	−41.17	0.00
R.N.	4.8759	3.8633	−36.86	0.00	2.7922	2.5875	−50.8	0.00
R.S.	1.2536*	1.5218	−70.82	0.99**	1.7306	1.4005	−62.76	0.80
(c) female size
No	6.8369	6.1522	−28.41	0.00	2.4942	2.6886	−53.62	0.01
I.Q.	3.2122	2.6582	−47.3	0.00	1.7786*	1.868	−62.08	0.88**
A.E.	1.9965	1.9814	−55.19	0.02	4.2328	3.3354	−36.4	0.00
R.N.	5.4417	4.6036	−34.12	0.00	3.0313	2.972	−48.75	0.00
R.S.	1.7177*	1.9163	−62.95	0.98**	2.105	1.6629	−57.86	0.11
(d) sex ratio
No	21.944	17.924	0.7408	0.00	0.3592	0.2792	−102.1	0.00
I.Q.	14.25	12.194	−10.05	0.44	0.0396	0.0541	−157.2	1.00
A.E.	13.101	11.231	−8.155	0.17	1.0152	0.2877	−72.1	0.00
R.N.	17.362	16	−5.114	0.04	0.712	0.3373	−84.96	0.00
R.S.	14.507	10.824	−9.606	0.35	0.1393	0.0412	−125.8	0.00

^*Significant values for RSS.

^**higher degree of support for each model (AICwt>0.25).

Bold: fitted model.

No = Normal; I.Q. = Inverse Quadratic; A.E. = Abundant Edges; RN = Ramped North; RS = Ramped South. RSS = residual sum of square; AIC = Akaike Information Criterion; AICwt = AIC weight.