Foraging activity and habitat use throughout an annual migration of adult walleye (Sander vitreus) from the Trent River in eastern Lake Ontario

Table 3 Significance of model terms in a series of separate GAMMs modelling water temperature and depth occupancy, as well as rate of vertical movement (ROVM) and rate of horizontal movement (ROHM) for migratory walleye (n = 12) in eastern Lake Ontario

Temperature (°C)	R² = 0.95
Model term	L ratio	P-value
Julian day (smoothed)	762.0	< 0.001
Hour of day (month-specific smoothing functions)	125.6	< 0.001
Sex (linear)	0.9	0.335

Depth (m)	R² = 0.46
Model term	L ratio	P-value
Julian day (smoothed)	153.7	< 0.001
Hour of day (month-specific smoothing functions)	74.4	< 0.001
Sex (linear)	1.7	0.195

ROVM (m/h)	R² = 0.30
Model term	L ratio	P-value
Julian day (smoothed)	547.9	< 0.001
Hour of day (month-specific smoothing functions)	363.4	< 0.001
Sex (linear)	5.2	0.023

ROHM (m/h)	R² = 0.03
Model term	L ratio	P-value
Julian day (smoothed)	68.2	< 0.001
Hour of day (month-specific smoothing functions)	7.2	0.067
Sex (linear)	1.6	0.212

Each model also included a month-based individual variance structure and a temporal autocorrelation structure. Model R² is provided and the significance of each term was tested using a series of likelihood ratio tests

ISSN: 2050-3385