Fig. 6
From: Sea ice directs changes in bowhead whale phenology through the Bering Strait
Total weekly call hours of vocalizing bowhead whales from October through May for 11 migratory seasons spanning 2009–2021. Gray bars indicate periods with no acoustic data. Asterisks indicate proportion of weekly effort (secondary y-axis) from the duty cycled data. Most migratory seasons had nearly 100% effort with the exception of 2018–2019. Annual weekly call hour histogram plot made in R [34] with the “ggplot2” package (v 3.3.6, [44]