Population effects of Navy sonar on marine mammals?

We’re delighted to announce the release of two reports that we’ve produced working with the Office of Naval Research, exploring how the interim Populations Consequences of Disturbance (iPCoD) might be adapted to explore the population level effects of Navy exercises on marine mammal populations. In this study we focused on populations of Blainville’s beaked whales and sperm whales on US Navy ranges in the Bahamas and around Hawai’i.

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Photos for fingerprints

Photo identification is a commonly used technique in studying marine mammals, for population estimation and deriving population demographic rates (e.g. survival rates, fertility rates). All of these are valuable inputs to PCOD models. Many whale and dolphin species can be identified for long lasting features by taking photos.

Eric Hoyt wrote a really nice piece with our friends at the Hakai Institute which provides a nice overview of how photo-ID is used to study humpback whales and other species.

Check it out and our projects!