Table 8.

Results of the final binomial generalized additive model investigating the presence of headshaking by lemon sharks in Bimini, Bahamas

Covariate		edf	ref.df	X2	p value	R2 (adj.)
Hour		5.903	8	73.82	≤ 0.05

–	Level	Coefficient	SE	z value	–
Tide	Intercept	0.576	0.212	2.722	≤ 0.05	0.0829
	Flood	0.012	0.132	0.090	0.929
	High	− 0.600	0.149	− 4.035	≤ 0.05
	Low	0.028	0.144	0.197	0.844
Season	Dry	− 0.868	0.282	− 3.082	≤ 0.05

Outcomes of the smoother hour include: covariate, effective degrees of freedom (edf), reference degrees of freedom (ref.df), Chi squared value (χ²), p value. Outcomes of factors include covariate, level, coefficient, standard error (SE), z value and p value. The overall adjusted R² value is also displayed