Predictors related to the probability of an observation being a ‘start-of-haulout’ observation.

Predictors of the probability of an observation being a ‘start-of-haulout’ observation were assessed compared to predictors consistent with ‘middle-of-haulout’ observations. Odds ratios are the relative odds of a seal being hauled out for one value of the covariate vs. another value [47]. Numbers in parentheses for vessel predictors are numbers of vessels.1Precipitation, sky condition, and cloud cover are strongly related; results are for each variable singly.2The odds ratio for precipitation is for ‘some’ relative to ‘none’.3The odds ratios for sky conditions (‘Partly Cloudy’, ‘Overcast’, and ‘Foggy’) are relative to ‘Clear’.4The odds ratio for Cloud Cover is the change for a 1% increase in cloud cover.5Results for binary vessel predictors (i.e., absence/presence); results for the binary vessel variables are easier to interpret, but show similar patterns to the continuous vessel predictor models. Odds ratios for vessel predictors are the odds of a ‘start’ observation when a vessel is present, relative to when no vessel is present.Predictors related to the probability of an observation being a ‘start-of-haulout’ observation.