Group | Covariate | Definition |
---|---|---|
Spatial | Location (UTM X and Y) | Easting and northing of receiver in UTM zone 10 |
Shoreline distance | Distance (km) to coastline | |
Bottom depth | Mean depth (m) of seafloor | |
Bottom slope | Mean slope (\(^{\circ }\)) of seafloor | |
Temporal | Year Day (1 and 2) | Calendar day converted to two variables representing cyclical process |
Lunar cycle | Proportion of moon illuminated (0-1) | |
Day-night | Whether detection occurred after sunrise and before sunset or not | |
Oceanographic | Temperature | Sea surface temperature (\(\hbox {C}^{\circ }\)) |
Hor. Current 1 | Horizontal momentum (m/s) in N-S direction | |
Hor. Current 2 | Horizontal momentum (m/s) in E-W direction | |
Vert. Current | Vertical momentum (m/s) | |
Zooplankton | Zooplankton concentration (\(\frac{\text { mmol N} }{\text { m }^3})\) | |
Oxygen | Dissolved oxygen concentration (\(\frac{\text { mmol O} }{\text { m }^3})\) | |
Thermocline depth | Mixed layer depth (m) based on vertical temperature profiles | |
Individual | Size | Fork length when tagged (cm) |
Lipid content | Converted whole body lipid content (% wet weight) | |
Maturity | Probability that an individual will mature in the same year as detection event |