Figure 5
From: Seasonal and diel acoustic presence of North Atlantic minke whales in the North Sea
Results of binary GAM with GEE models for the presence/absence of minke whale pulse trains in each hour of recording, estimating the relationship between the response variable and a diel cycle index value, based on sunrise/sunset data and calculated for each hour (see Methods). Models were run for all multi-year data (2015–2018) collected at the Helmsdale recording site (c), and separately for autumn-spring (a) and summer (b) data. Summer was defined as the period between May 20th and July 22nd, when the study area experiences all-night nautical twilight. The light grey shaded areas represent 95% confidence intervals.
