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The 411: The Ecology of Risso Dolphins
Found on: https://experiment.com/projects/population-ecology-of-risso-s-dolphins-in-monterey-bay-california?s=discover
Population Ecology of Risso's Dolphins in Monterey Bay, California
Backed by Sarah Blackstone, Allie Kozachuk, Fran Heath, Annette Dehalt, Michael Broome, Mohammad Faisal Haider, Jane Mayer, Stefanie Kaku, Pureum Kim, Maya Hoffman, and 3 other backers
About This Project
Very little is known about the ecology of Risso's dolphins inhabiting the waters of the Pacific Northwest. For example population size, distribution, occurrence, and foraging habits are sparse in detail. At Marine Life Studies we have collected over 10 years of data on Risso's dolphins inhabiting Monterey Bay, California. Using photo-identification, UAV's, movement patterns, and foraging observations, we hope to produce details on the natural history of this charismatic species.
Ask the Scientists
JOIN THE DISCUSSIONWhat is the context of this research?
Very little is known about the natural history and ecology of Risso's dolphin in the Pacific Northwest. They are a pelagic species inhabiting waters near the continental shelf, where it is believed they specialize on different cephalopod species (Ford, 2014). They are characterized by their large size and grey to white colouration (often due to scars). During 10 years of our dedicated marine mammal surveys, we have collected hundreds of photographs and detailed notes on their behaviour. Photographs show distinct characteristics in dorsal fin morphology with each individual: fin shape, nicks, and scars. We are now driven to create a photo-identification catalog for individuals sighted in Monterey Bay, California. We also plan to study their foraging and social behaviour.
What is the significance of this project?
With so little known about Risso's dolphins, understanding their population ecology and foraging can help set goals and management plans for protecting both the species and it's resources. We believe Monterey Bay, California acts as critical habitat for Risso's dolphins, as the bay serves as one of the largest market squid (Loligo opalescens) fisheries in the Pacific Northwest. Life history parameters will allow us to understand how Risso's dolphins interact with the squid fishery, and how a changing ecosystem with fluctuations in their prey will affect the Monterey Bay food web.
What are the goals of the project?
Using photographs of distinguishing features present on the dorsal fins, and mark recapture analysis, our goal is to provide estimates for population size of Risso's dolphins utilizing Monterey Bay, California. This will allow us to distinguish socialization patterns, birth and death rates, occurrence, patterns, and distribution. We will be starting this analysis right away and hope to continue following this species for years to come.
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