Table 2.

Summary statistics of the orientation of glass eels (Anguilla anguilla) according to magnetic north, tidal and moon phase and the moon's position at the horizon. N, number of eels. Mean bearings represent the topographical bearing of the eel relative to magnetic north or to the moon azimuth (0° = toward the moon, 180° = away from the moon). These are only presented when significant (Rayleigh test, r is the angular dispersion, p = Rayleigh's p-value). The moon position either below or above the horizon is provided for each test configuration. Fig., reference figure where those data are displayed.

				magnetic north			moon azimuth
moon phase	tidal phase	moon at horizon	N	mean bearing (°) αnorth	r	p	mean bearing (°) αmoon	r	p	fig.
full	flood	below	20	—	0.09	0.86	—	0.05	0.96	4a
	ebb	below	26	—	0.17	0.48	—	0.29	0.10	4a
third q.	flood	below	11	—	0.09	0.92	—	0.06	0.97	4b
	ebb	above	9	—	0.48	0.12	—	0.49	0.11	4b
new	flood	above	35	—	0.17	0.37	3°	0.31	0.04	4c
	ebb	above	45	195°	0.42	0.0002	16°	0.43	0.0001	4c
first q.	flood	above	13	147°	0.64	0.003	75°	0.68	0.0014	4d
	ebb	below	16	—	0.32	0.18	—	0.35		4d