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Reduced body mass of NW gray whales causes concerns

"Three years of “health check-ups” on Oregon’s summer resident gray whales shows a compelling relationship between whales’ overall body condition and changing ocean conditions that likely limited availability of prey for the mammals, a new study from Oregon State University indicates... They found that the whales’ health declined following a period of relatively poor upwelling – an ocean condition that brings colder, nutrient-rich water closer to the surface – compared to previous years." - Excerpt from Oregon State University

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