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Vancouver Aquarium marine mammal trainers Kristi Heffron and Jenna Petersen work with Aurora, a beluga whale, being, is fitted with a vest that will hold cables to measure her resting metabolic rate. The data acquired is helping to assess energy requirements for adult belugas in the wild. (John Lehmann/The Globe and Mail)
Vancouver Aquarium marine mammal trainers Kristi Heffron and Jenna Petersen work with Aurora, a beluga whale, being, is fitted with a vest that will hold cables to measure her resting metabolic rate. The data acquired is helping to assess energy requirements for adult belugas in the wild. (John Lehmann/The Globe and Mail)

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