Antarctic toothfish and macrourids are likely important prey of Arnoux’s beaked whales in the Ross Sea region

On the basis of circumstantial evidence, an elevated likelihood exists that Antarctic toothfish and the most-caught by-catch species, macrourids, in the Area 88 fishery are important components in the diet of the Arnoux’s beaked whale (Berardius arnouxii), which is a component of the Ross Sea top predator guild.