The rare recording shows that the big mammals are picky eaters, and they won't consume the meal, unless its size is worth their effort.
The data captured by the cameras will not only help scientists understand the whale's feeding patterns, social habits and role in the Antarctic ecosystem, but as well as help them determine how any change in krill populations affect them. By understanding these, they will be able to come up with measures to help them survive.
Following the arrival of gentoo penguins along the West Antarctic Peninsula, native Adelie penguins have experienced population declines. However, researchers are unsure whether increased food competition among the two species or climate change is ultimately to blame.
The Adélie penguins in East Antarctica like rocky areas free of snow and ice, so they happen to increasing in number as a result of the more ice-free coastlines from climate warming. It is still unclear how warming temperatures will affect their krill food sources, though.
A recent study found that there's a "magic number" of krill for blue whales to find in order to gather enough energy for their massive bodies. If they don't find the tiny food sources in concentrated supply, the whales have to hold their breaths more and do more gathering.