Table 2: Factors present in the stepwise-reduced model for each dataset where significant multiple linear regressions were obtained. P indicates that the factor was present in the reduced model, and + or − indicates whether there was a positive or negative relationship of the factor compared to the number of Cetaceans. Where no + or − is present, the factor was a category variable. N/A indicates that this variable was not used as an explanatory factor in the analysis.

Factor Full dataSet Presence only Presence only and behaviour Date P+ Boat P Time of day Behaviour of cetacean N/A N/A P Presence of humpback whales Presence of killer whale Presence of white-beaked dolphin Sea state P− Percentage of cloud cover P+ Weather conditions Wind direction Tidal conditions Swell height Visibility P+ P+ Sea surface temperature P− P− Observer