The world’s biggest dolphin eating the world’s coolest dolphin

During a seemingly ordinary fall day with dolphins,  I captured killer whales attacking and eating a dolphin on film.  It inspired me to devote a chapter of my PhD to killer whale predation on dolphins and the incredibly dynamic interaction unfolding between an intelligent, efficient predator and its similarly intelligent prey.  I’m hooked.  There is so much to learn about this process.  Our colleagues have written very cool papers describing how mammal-eating killer whales attack and kill their prey:  here’s one and here’s another.  And someone has just posted another cool video of dolphins and killer whales off Hyacinthe Island.  We’ve been trying to track down whoever shot that video so we can compare notes.  If you know who they are, could you please put us in touch?  Thanks!

The Pacific white-sided dolphins we study are engaged in a daily struggle between finding food and avoiding being eaten.  Some days are better than others.  If you look in any field guide to marine mammals, you’ll find that Pacific white-sided dolphins are supposed to be an offshore, open-ocean species.  We think these dolphins are here, in the inshore waters of British Columbia off northeastern Vancouver Island, in part to take advantage of fairly reliable food sources like herring and other small, schooling fish.  We also think that chasing fish in these parts carries a serious risk.  Death.  This area is known for reliably seeing resident, salmon-eating killer whales, but the inlets that the dolphins use are also prime hunting spots for mammal-eating, transient or Bigg’s killer whales.

A lot of the work we do is to understand the choices that these dolphins make between finding food and avoiding predators.  While dolphins may not avoid predation altogether, they might have some behaviors up their sleeves that allow them to survive in habitat where predators could be around every corner.  Maybe they cut their foraging a bit short here and there, or keep quiet to elude detection by the killer whales highly-evolved sensory systems.  But smart as dolphins are, they’re not going to 100% effective at avoiding predators.  And hey:  killer whales (OK, you know that killer whales are the biggest member of the dolphin family, right?) have to eat, too.

Why are you in Scotland when the whales you study are in Canada?

We get asked that question a lot.

Today, we saw the best answer possible to that question, in E.O. Wilson’s amazing TED talk, called “Advice to Young Scientists”. We’ll wait while you watch it.

Wilson outlines the lessons learned from his career in interdisciplinary science as a series of basic principles, but the most important one is this:

Don’t worry if you love biology but are afraid of math.

You can learn math the way you learn any other language. You can earn excellence in your field, whatever your level of statistical expertise. And you can always find statisticians to collaborate with.

Which is the answer to our Scottish-Canadian mismatch question. Yes, our whales are in Canada, but some of the world’s best statisticians who work on conservation biology work at the University of St Andrews. We’re extraordinarily lucky to work with them, and extraordinarily grateful that these statisticians are interested in the biology we do. And when these statisticians offered to help us spend 2 years improving the science we do, so we can better protect the whales and dolphins we study, we leapt at the chance.

The Pacific Northwest is special too. We could do field work or analysis anywhere, but it’s only in British Columbia where our field work is integrated seamlessly into our everyday lives. We’re looking forward to getting back to the field briefly next month, and on a more permanent basis when we move back home in December.

Wilson also outlined a principle about choosing ideal study animals and research questions. He believes that for every problem in science, there is a species ideally suited to study that problem. Conversely, for every species you study, there is an important scientific problem for which that species offers an opportunity to develop a solution.

Our primary study animals (killer whales & Pacific white-sided dolphins) represent a great span from data-rich to data-sparse systems, and the other species we study (e.g., fin & humpback whales, sharks & mola mola) are intermediate points along that spectrum. With resident killer whales, we’re constantly running into the need to do analyses that take into account how much is known about these animals. It becomes a challenge to make our studies sufficiently generic that they can be applied to other populations of whales around the world. Pacific white-sided dolphins, on the other hand, represent much more of a blank canvas. All of the research that we do on them feels pioneering. Discoveries hide around every corner. Just getting enough data points to fit a simple statistical model can be a challenge. But this tension — between well studied and poorly studied animals, or between rare or abundant populations — is the fascinating and exciting part of our work.  It’s our passion.

But passion takes work too. We think that Julia Child said it best:

“Find something you’re passionate about and keep tremendously interested in it.”

That last bit — keep interested — is the key. In any field of science (or when perfecting your boeuf bourguignon recipe), the novelty wears off quickly. You have to sustain it, and that’s hard work. It can also be expensive work. Science, like fashion, has its trends, and it can be tempting to follow those trends. Funders and scientific journal editors like it when you follow those trends by placing your research questions in the context of the latest hot topic. It can help you build a solid and safe career. But there is something inordinately satisfying about creating your own trend. We start every project by finding out what’s already being done by our colleagues, and we try to explore new territory.  Because we find funding for every project we do, and because the animals we study face so many competing conservation threats, it is important to us that we not reinvent the wheel. We deliberately seek out the margins, and that can feel a bit uncomfortable at times. We were thrilled to hear Professor Wilson address this in his TED talk: in the military, there is a famous saying that soldiers should follow the sound of the guns. In science, Wilson encourages us to move in the opposite direction of the guns. He says,

“Don’t follow the fray. Make your own fray.”

Thanks for helping us to make our own fray.

VALUE FOR MONEY

Surveying Antarctic whales

In these troubled economic times, scientists are under increasing pressure to (a) demonstrate the value of the services we provide to society, and (b) find creative ways to provide those services at ever-lower cost.  Money is scarce, and environmental research is competing for funding with other worthy causes.  Because many of the biggest foundations in the charitable sector make funding decisions based on the year-end value of  their portfolio, an economic downturn like the 2008 crash can affect funding decisions for years to come, so that grantmaking remains low and risk-averse long after the private sector has started to experience fiscal recovery.

At Oceans Initiative, we specialize in doing more with less.

The theme of Rob’s doctoral thesis was how to study whales when you have no money.  The mathematical models at the core of his PhD research were cutting edge and represented an interesting scientific question in their own right, but their real societal value was to provide cost-effective tools to estimate how many whales are in an area by collecting sightings from ships that were already on the water:  platforms of opportunity.  He developed the methods in the Antarctic, where research costs are high and whale populations are still recovering from historic whaling.  Our colleague, Nicole Koshure, recently earned her Master’s degree from Simon Fraser University using a similar approach to estimate abundance of cetaceans around Vancouver Island using sightings collected from the Straitwatch monitoring vessel.

We’ve just read about a new partnership between UVic and BC Ferries, where forward-thinking oceanographers have installed sophisticated sensors on ferries to collect oceanographic data to monitor the health of the Strait of Georgia.  We think this is a great idea.  In our view, funding is the greatest challenge we face in marine conservation.  Kurt Vonnegut said it best:  “We could have saved the Earth but we were too damned cheap.”  True enough, but given the financial realities we face, there is also a compelling need for scientists to identify clever, cost-saving methods so we can identify ways to be sound stewards of the environment at minimal cost to society.

A PICTURE IS WORTH A THOUSAND WORDS

Please check out our Pinterest boards

 

Maybe it’s a sign that we’re spending too much time in front of our computers these days, but it’s been fun to post some of our favourite whale & dolphin pictures on Pinterest.  Pinterest is a wildly popular and addictive website that allows you to pin, post & share photographs.  It has allowed us to reminisce about some of our favourite days on the water, and daydream about the projects we’re doing next.  Fair warning:  we have plenty of dolphin material to work with.  Erin and her friends are going through 10,000 dolphin photographs now to assemble a catalogue of mugshots of individual dolphins for her PhD project.

Please check out our Pinterest boards if you want to see more about the whales and dolphins we study, and the products that make field work a little more fun.

OCEANS ELEVEN

Our plan was to spend a quiet year in Scotland.  Erin’s making great strides on her PhD on Pacific white-sided dolphins.  Rob won a Marie Curie Fellowship to model the effects of noise on whale populations.  But MAN!  This ended up being one of our busiest years ever.  Here are 11 of our highlights of 2011.