Video analysis in 3-D shows the tiny creatures’ swarming rules
Antarctic krill form the biggest biomass swarms on Earth. “You can even see them from space,” says Alicia Burns, a behavioral biologist at Taronga Conservation Society Australia. Krill swarms play a vital role in the food chain and in cycling atmospheric carbon into the depths of the Southern Ocean. How these tiny, shrimplike creatures form and maintain massive clusters is poorly understood.
Geraint Tarling, a biological oceanographer at the British Antarctic Survey, who was not involved in the study, agrees: “This is the first leap that we've had from a theoretical expectation—what we expect [krill] to do—to an absolute observed identification of what the behavioral rule is.”
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