Table 4.

Summary of the data generated and used for statistical analysis in the current study. g, grams; av. dia., average diameter; % - percentage; AC, anterior cingulate cortex; OC, occipital cortex.

Common name	Species name	Brain mass (g)	Large bouton av. dia. (μm)		Small bouton av. dia. (μm)		Large bouton %		Small bouton %		Neuronal density (mm³)		Glial density (mm³)		Glia:neuron ratio		Orexinergic bouton density (mm³)
			AC	OC	AC	OC	AC	OC	AC	OC	AC	OC	AC	OC	AC	OC	AC	OC
Domestic pig	Sus scrofa	67	2.149	2.416	1.128	1.047	32.17	42.74	67.83	57.26	18 355	23 808	108 238	133 283	5.897	5.598	3386	3720
Nubian ibex	Capra nubiana	132	2.079	2.341	0.994	0.952	37.27	34.75	62.73	65.25	12 992	13 104	81 151	87 317	6.246	6.663	6910	3192
Springbok	Antidorcas marsupialis	224	2.031	2.277	1.049	0.961	36.36	34.86	63.64	65.14	11 808	13 887	69 440	86 121	5.881	6.202	12 351	1682
Arabian oryx	Oryx leucoryx	244	2.433	2.236	1.111	1.009	30.83	32.52	69.17	67.48	12 165	11 968	70 747	67 635	5.816	5.651	5699	2686
Blue wildebeest	Connochaetes taurinus	399	2.410	2.499	1.044	0.996	26.56	23.73	73.44	76.27	22 108	22 957	70 145	76 245	3.173	3.321	5128	996
African buffalo	Syncerus caffer	407	2.286	2.219	1.105	0.901	37.50	34.15	62.50	65.85	13 889	16 739	106 311	111 595	7.654	6.667	6749	1264
Dromedary camel	Camelus dromedarius	412	2.242	2.174	1.047	1.017	26.73	31.00	73.27	69.00	15 635	9930	99 084	66 354	6.337	6.682	10 774	1711
Nyala	Tragelaphus angasii	417	2.256	2.292	1.109	1.002	23.08	31.90	76.92	68.10	9432	10 718	65 040	87 719	6.896	8.184	11 335	1733
River hippopotamus	Hippopotamus amphibius	435	2.358	2.435	1.017	1.021	24.26	34.44	75.74	65.56	7516	8135	58 984	75 775	7.848	9.315	5392	2905
Giraffe	Giraffa Camelopardalis	544	2.323	2.405	1.009	1.009	41.58	35.78	58.42	64.22	23 303	19 380	107 502	74 723	4.613	3.856	10 075	1769
Harbour porpoise	Phocoena phocoena	503	2.371	2.309	1.036	0.999	25.22	23.94	74.78	76.06	10 938	20 129	97 623	153 415	8.925	7.622	1052	792
Minke whale	Balaenoptera acutorostratus	2900	2.216	2.390	0.980	0.920	34.51	40.63	65.49	59.37	8671	11 119	82 149	114 384	9.474	10.287	1317	960