Exploring Relationships between Demersal Resources and Environmental Factors in the Ionian Sea (Central Mediterranean)

Table 2

(a) Summary of the six candidate models for density data of the species investigated in the Ionian Sea, including AIC_c, Δ_i values for AIC_c, Akaike weights (𝑤_𝑖), based on AIC_c, and adjusted 𝑅² values. Models are ordered in terms of Δ_𝑖 for AIC_c. Predictive variables are: 1: fishing effort, 2: NAO index, 3: SST and 4: precipitation. (b) Summary of the six candidate models for recruitment index of the species investigated in the Ionian Sea, including AIC_c, Δ_𝑖 values for AIC_c, Akaike weights (𝑤_𝑖), based on AIC_c, and adjusted 𝑅² values. Models are ordered in terms of Δ_𝑖 for AIC_c. Predictive variables are: 1: fishing effort, 2: NAO index, 3: SST and 4: precipitation.

(a)

Dependent variable	Model	AlCc	Δ𝑖 AlCc	𝑤𝑖	Adjusted 𝑅^2
Density index (ln) Aristaeomropha foliacea	{1 2}	9.168	0.000	0.408	0.434
	{1}	9.381	0.213	0.367	0.397
	{1 2 3 4}	11.728	2.560	0.113	0.389
	{1 3 4}	12.059	2.891	0.096	0.352
	{3 4}	16.315	7.147	0.011	0.116
	{2}	18.228	9.060	0.004	−0.048
Density index Nephrops norvegicus	{1 3 4}	167.605	0.000	0.442	0.498
	{1}	169.025	1.420	0.217	0.402
	{1 2 3 4}	169.329	1.724	0.187	0.465
	{1 2}	170.446	2.841	0.107	0.380
	{3 4}	172.140	4.535	0.046	0.316
	{2}	178.854	11.249	0.002	−0.067
Density index (ln) Parapenaeus longirostris	{1 2 3 4}	5.772	0.000	0.555	0.235
	{1 2}	7.776	2.004	0.204	0.263
	{1 3 4}	8.510	2.738	0.141	0.171
	{3 4}	10.470	4.698	0.053	0.136
	{1}	11.131	5.359	0.038	0.162
	{2}	13.832	8.060	0.010	0.017
Density index Merluccius merluccius	{2}	203.555	0.000	0.454	0.306
	{1 2 3 4}	204.465	0.910	0.288	0.357
	{1 2}	205.453	1.898	0.176	0.261
	{3 4}	208.339	4.784	0.042	0.125
	{1 3 4}	209.139	5.584	0.028	0.121
	{1}	210.826	7.271	0.012	−0.064
Density index Phycis blennoides	{1}	181.760	0.000	0.329	−0.060
	{2}	181.827	0.067	0.318	−0.064
	{3 4}	183.444	1.684	0.142	−0.115
	{1 2}	183.738	1.979	0.122	−0.134
	{1 3 4}	184.990	3.230	0.065	−0.169
	{1 2 3 4}	186.990	5.230	0.024	−0.266
Density index (ln) Mullus barbatus	{1}	−1.962	0.000	0.455	0.098
	{1 2}	−0.847	1.115	0.260	0.083
	{2}	0.610	2.571	0.126	−0.049
	{1 3 4}	1.947	3.909	0.064	−0.035
	{34}	2.121	4.082	0.059	−0.092
	{1234}	3.147	5.109	0.035	−0.070

(b)

Dependent variable	Model	AlCc	Δi AlCc	𝑤𝑖	Adjusted 𝑅^2
Recruitment index (ln) Parapenaeus longirostris	{1}	15.095	0.000	0.447	0.476
	{1 3 4}	16.546	1.451	0.216	0.480
	{1 2}	16.653	1.558	0.205	0.453
	{1 2 3 4}	17.601	2.506	0.128	0.467
	{3 4}	25.136	10.041	0.003	0.099
	{2}	27.166	12.070	0.001	−0.066
Recruitment index Nephrops norvegicus	{1 3 4}	151.903	0.000	0.465	0.481
	{1 2 3 4}	153.319	1.416	0.229	0.457
	{1}	154.145	2.242	0.152	0.350
	{3 4}	155.191	3.288	0.090	0.342
	{1 2}	155.976	4.073	0.061	0.311
	{2}	161.916	10.013	0.003	−0.026
Recruitment index Merluccius merluccius	{2}	184.842	0.000	0.539	0.293
	{1 2}	186.792	1.950	0.203	0.245
	{1 2 3 4}	187.136	2.294	0.171	0.290
	{3 4}	189.820	4.978	0.045	0.098
	{1 3 4}	191.050	6.208	0.024	0.072
	{1}	191.765	6.923	0.017	−0.062
Recruitment index (ln) Mullus barbatus	{2}	8.891	0.000	0.324	−0.070
	{1}	9.017	0.126	0.305	−0.079
	{3 4}	10.371	1.480	0.155	−0.124
	{1 2}	10.674	1.783	0.133	−0.149
	{1 3 4}	12.355	3.464	0.057	−0.235
	{1 2 3 4}	13.961	5.070	0.026	−0.335