Host Mike G. dives into new discoveries from the exciting field of marine bioacoustics research that are helping us better understand the lives of whales and dophins, and we feature fascinating recordings from that research.

His first guest is Erin Ross-Marsh, the lead researcher on a study of humpback whales at the Vema Seamount in the South Atlantic off the coast of South Africa. Ross-Marsh tells us about the study's finding that these humpbacks were making gunshot calls, a type of non-song call that was previously unknown in these particular whales, and plays some humpback songs, non-song calls, and gunshot calls for us to listen to.

He also speaks with Sarah Trabue, a research assistant with the Wildlife Conservation Society (WCS) who is the lead author of a recently published paper detailing the findings of a bioacoustic study of bottlenose dolphins in and around New York Harbor.

Trabue discusses what the study reveals about dolphin behavior in the highly trafficked waters around New York City and plays for us some of the dolphin vocalizations recorded as part of the study.

Further reading:

• Mongabay: "What's popping? Humpbacks off South Africa, new acoustic study finds"

• WCS: "The New York – New Jersey Harbor Estuary is a Dining Hotspot During Summer and Autumn Months for Bottlenose Dolphins"

Episode artwork: humpback whales off the coast of Hawaii. Photo Credit: Ed Lyman/NOAA.

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