Minkewhales represent smallest size threshold that a lunge-feeding baleen whale can be, shows study NatureEcoEvo
In the new study, published March 13 in, researchers used noninvasive suction tags to observe 23 Antarctic minke whales in the waters off the West Antarctic Peninsula, tracking their daytime and nighttime foraging behavior as they fed on Antarctic krill. Data from previous studies of krill-feeding humpback whales and blue whales were used for comparison.
Minke whales are not as well studied as other species of baleen whales, in part because they can be harder to find and tag. "The data in this study represent more information on a poorly studied species than has ever been published previously and is helping us to better understand not only the species, but the role of baleen whales in marine ecosystems," said co-author Ari Friedlaender, professor of ocean sciences at UC Santa Cruz.
At night, the smaller, more maneuverable minke whales are well suited for pursuing small, scattered patches of krill at the surface."When they're surface feeding, they don't have to hold their breath during dives and they can do lunges over and over again," Cade said."Only at night can they get the really high feeding rates they need."
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