Table 1. Top-ranked candidate models exploring the factors that affect the number of views of YouTube videos related to mountain gorilla tourism (only the models with Δ AIC values less than 6 are shown).

(N = 206).

Ranka	Nestingb	Explanatory variables								logLik	df	AIC	Δ AIC	Akaike weight
		Number of subscribes	Days after upload	Length of videos	Population	Silverback	Infant	Thumbnail	Minimum distance
1	-	+	+			+		+	+	-1999.85	10	4019.71	0.00	0.20
2	Non-nested	+	+					+	+	-2001.47	9	4020.94	1.23	0.11
3	Nested	+	+			+	+	+	+	-1999.74	11	4021.48	1.77	0.08
4	Nested	+	+	+		+		+	+	-1999.79	11	4021.58	1.87	0.08
5	Nested	+	+		+	+		+	+	-1999.84	11	4021.69	1.98	0.07
6	Nested	+	+	+				+	+	-2001.31	10	4022.62	2.91	0.05
7	Nested	+	+				+	+	+	-2001.46	10	4022.93	3.22	0.04
8	Nested	+	+		+			+	+	-2001.47	10	4022.94	3.23	0.04
9	Non-nested	+	+			+		+		-2004.51	7	4023.01	3.30	0.04
10	Nested	+	+	+		+	+	+	+	-1999.67	12	4023.33	3.62	0.03
11	Nested	+	+		+	+	+	+	+	-1999.72	12	4023.45	3.74	0.03
12	Nested	+	+	+	+	+		+	+	-1999.78	12	4023.56	3.85	0.03
13	Non-nested	+	+					+		-2006.20	6	4024.40	4.69	0.02
14	Nested	+	+		+	+		+		-2004.29	8	4024.58	4.87	0.02
15	Nested	+	+	+			+	+	+	-2001.30	11	4024.60	4.89	0.02
16	Nested	+	+	+	+			+	+	-2001.31	11	4024.62	4.91	0.02
17	Nested	+	+	+		+		+		-2004.32	8	4024.64	4.93	0.02
18	Nested	+	+			+	+	+		-2004.45	8	4024.89	5.19	0.01
19	Nested	+	+		+		+	+	+	-2001.46	11	4024.93	5.22	0.01
20	Nested	+	+	+	+	+	+	+	+	-1999.65	13	4025.30	5.59	0.01

^a Rank based on Akaike information criterion (AIC) values

^b "Nested" indicate that the model is a more complex version of a model that has a lower AIC value