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In this episode, Erica chats with Dr. Marla Holt Research Wildlife Biologist for the Marine Mammal Ecology Team at NOAA. Marla\'s current research focuses on marine mammal acoustics including the effects of noise on the acoustic signals and behavior of Southern Resident killer whales, their use of sound during different activity states, and the cost of sound production in odontocetes. 

Correction: 

There are now currently 74 SRKW\'s at the time of recording there were 75