Ocean gliders: Understanding drivers of large whale habitat use

Gliders are autonomous underwater vehicles (AUVs) that move through the water column by changing their buoyancy, profiling the ocean in a saw-tooth pattern. Gliders move slowly along a pre-programmed track over multiple weeks. As part of our New York Bight monitoring program, we conduct seasonal glider missions using Slocum gliders outfitted with DMONs, which together provide oceanographic data and passive acoustic detections of large whales. These missions provide real-time detections of baleen whales during glider surveys, which are used to trigger voluntary slow-down zones when North Atlantic right whales are detected. In addition, we analyze the complete, continuously recorded acoustic dataset after glider recovery to examine patterns of habitat use in North Atlantic right whales, fin whales, sei whales and humpback whales. Together, data from these gliders allow us to model large whale habitat use using concurrently sampled subsurface oceanographic data.