Table 9.

Fitted means and standard errors of the frequency of each social behaviour, depending on visitors for Yangtze finless porpoises (YFPs), East-Asian finless porpoises (EAFPs) and bottlenose dolphins (BDs). Outputs come from Wald chi-squared tests run on Generalized linear mixed models, significant outputs are bolded. For each species and each behaviour, items sharing the same letter did not differ significantly, items that do not share the same letter differ significantly (post-hoc tests with sequential Bonferroni correction).

Species		YFPs			EAFPs			BDs
Visitors		None	Few	Many	None	Few	Many	None	Few
Left Pectoral Contact	Mean	1.14	1.14	1.31	3.70	2.90	1.60	1.01	1.00
	SE	2.82	2.82	5.60	0.65	0.53	0.24	1.22	0.87
	Output	χ² = 15.83, df = 2, p < 0.001			χ² = 62.53, df = 2, p < 0.001			χ² = 2.15, df = 1, p = 0.142
	Pairwise	a	b	a	a	a	b
Right Pectoral Contact	Mean	1.22	1.20	1.20	3.17	2.94	1.80	1.02	1.02
	SE	0.15	0.14	0.14	0.66	0.62	0.34	0.01	0.01
	Output	χ² = 14.16, df = 2, p = 0.12			χ² = 38.902, df = 2, p < 0.001			χ² = 0.00, df = 1, p = 0.986
	Pairwise				a	a	b
Other Body Contact	Mean	1.01	1.01	1.00	9.03	6.20	4.57	1.01	1.01
	SE	0.24	0.25	0.06	0.38	0.29	0.27	0.76	0.64
	Output	χ² = 1.44, df = 2, p = 0.49			χ² = 7.12, df = 2, p = 0.028			χ² = 0.11, df = 1, p = 0.744
	Pairwise				b	ab	a
Agonistic	Mean	1.12	1.11	1.16	3.17	3.91	4.48	1.28	1.35
	SE	3.57	3.27	4.77	0.19	0.20	0.24	0.12	0.14
	Output	χ² = 1.39, df = 2, p = 0.498			χ² = 6.65, df = 1, p = 0.010			χ² = 3.11, df = 1, p = 0.776
	Pairwise				b	ab	a
Socio-Sexual	Mean	1.11	1.08	1.10	6.03	6.99	6.80	1.60	1.64
	SE	10.86	8.26	10.32	1.77	2.00	2.00	0.30	0.32
	Output	χ² = 2.14, df = 2, p = 0.343			χ² = 2.64, df = 2, p = 0.267			χ² = 0.11, df = 1, p = 0.737
	Pairwise
Social Play	Mean	NA			NA			1.38	1.15
	SE							0.12	0.05
	Output							χ² = 52.95, df = 1, p < 0.001
	Pairwise							a	b