Work to track underwater noise pollution continues of Puget Sound as endangered southern resident orcas continue to struggle. FOX13
, and scientists are continuing their work to understand their hunting grounds.
Scientists have long been tracking the decline of the southern residents' population. Three key issues have been identified: prey availability, contaminants in the water and noise pollution. "It’s dire," said Jason Wood, the managing director of SMRU Consulting. "I’m concerned, specifically about this population."
Orcas – which use echolocation to hunt their prey – struggle to feed themselves as their hunting grounds become noisier. While transient killer whales – also known as Biggs Killer Whales – hunt larger marine mammals, the southern resident orcas feed on salmon. Chasing a single fish costs them a massive amount of energy, and given that a number of salmon species in Washington state are endangered themselves, noise compounds an already precarious situation.
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