Fig. 4
From: Seasonal and diel acoustic activity of sei whales (Balaenoptera borealis) in the New York Bight
The predicted (orange) and observed (blue) number of downsweeps per week, separated by year. Chlorophyll-a concentration (Chl-a) is represented by the black trendline, weeks 12–14 (late March to mid-April) are shown between the vertical dashed black lines, and weeks with a mean SST between 5 and 9˚C are highlighted within the shaded blue rectangle. The y-axis on the left of the figure describes the proportion of days per week with presence (both predicted and observed), while the y-axis on the right of the figure describes the Chl-a (mg m−3).
