A superpod of Delphinus were quickly traveled past the R/V Shearwater when Channel Island National Marine Sanctuary researchers first deployed a sonobuoy in the Santa Barbara Channel in August 2017. The hydrophone recorded many loud whistles, clicks, and pulsed calls as the animals passed by. This material relates to a paper that appeared in the 18 Oct. 2017, issue of Science Advances, published by AAAS. The paper, by R.I. Ruiz-Cooley at San Jose State University in Moss Landing, Calif., and colleagues was titled, "Temporal variation in pelagic food chain length in response to environmental change."
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