Dr Ryan Kempster is a shark biologist and founder of the non-profit organisation Support Our Sharks (SOS). He obtained his B.Sc. (2005) and M.Sc. (2007) in marine biology in the UK, and went on to complete a Ph.D. at the University of Western Australia (UWA) in the sensory biology of sharks. Dr Kempster recently spent a month with Oceans Research working on his shark deterrent project.
EJ: How did you end up in science and research?
RK: I’ve always had an interest in animals and science, although my path has changed quite a lot, which was dictated by how well I was doing in certain subjects. When I was younger, I wanted to be a vet, but didn’t quite get the grades needed. My college supervisor had a nephew studying marine biology so he threw it out to me as an idea. I ended up doing a similar internship to Oceans Research in Thailand and I gained experience over there where I fell in love with the ocean. That encouraged me to go into marine biology. It seemed like the perfect route for me, and my career evolved from there.
EJ: The ocean hooks you…
RK: It definitely does. It was quite random as I grew up in Manchester in the north of England and never really had any experience with the ocean before that. We went to the beach every so often, but it was often miserable, rainy and not that tropical kind of beach experience.
EJ: Do you consider yourself more of a biologist or a conservationist?
RK: This again has evolved. Initially I was a conservationist… that’s where I came from as I was always about saving and protecting animals. Science was a way to facilitate that. Over the years I’ve understood that science is a way to instruct conservation efforts. Giving people the information they need to bring about conservation through change is much more beneficial than just being a voice that constantly states the same thing people have already heard. That’s why I’ve put a lot more focus into my research to give people answers. I think taking all that into account, I much prefer to place myself as a scientist now more than a conservationists, though the two are intimately related.
EJ: So you’re a biologist, but conservation is a big factor?
RK: I like to think that everything I do as a scientist has a conservation purpose. Sometimes it’s quite a long route to where the conservation benefits come in, but they’re there. The work we do is neuroscience focused, such as the shark’s sensory system, so at the moment we are working on shark deterrents. Shark deterrents have big benefits for conservation, as opposed to something like shark culling. It’s hard for people to appreciate how understanding the biology of these animals relates to conservation, but there’s a path there that leads to conservation and we need to have that basic understanding to get there.
EJ: What is the main goal of your non-profit, Support Our Sharks?
RK: Support Our Sharks is a combination of sharing my research, educating people, and with that, bringing about conservation and change. So, really, it’s about bringing together an elective of people who have the power to make those changes. This has been great in Western Australia with all the shark related issues we’ve seen. Having the backing of so many people in the group really helps us to push the petitions and bring about changes in legislations. Really, we’re trying to reach as large an audience as possible with genuinely good information that has a basis in research and science, rather than the typical media hype about killer sharks. It facilitates more research and gives people the opportunity to support that research.
EJ: So the information you give to people is as factual as possible?
RK: Yes. A lot of the information comes from my own personal experience through the research I’m doing. Or through my own reading and learning and I share what I think is relevant. It’s a way of facilitating all of the knowledge I’ve learned about sharks over the years and sharing it with others.
EJ: I see you’ve created videos that cater for kids. Are they your main target audience?
RK: My audience is more general. If you look at the statistics on who accesses the social media pages, there’s a very broad range of people. Certainly, in Perth, we do a lot of school visits, so that brought about creating these videos. When I first started the talks, I had no content to show them. It became apparent that I needed visuals… something for the kids to engage with. I’ve always had an interest in animation so that’s why I chose to make the videos.
EJ: I love the Why Shark’s Matter video, as does my 3 year old. I use it at my own school talks and the audience love it.
RK: I’ve noticed that although it seems targeted at kids, it works really well for adults too. I have that same philosophy when I present at a scientific conference. You talk to these old dog scientists who tell you to get all the data and stats in your presentation, but you realise that all people want is a really simple approach to how you’ve done things. They want to sit back. They don’t want to have to think too hard and almost want to be spoon fed the information. I find that with the animations, the adults also love that stuff.
EJ: Have you used the same animations at the conferences?
RK: Not those ones specifically, but other versions of them. In fact when we came to Mossel Bay a couple of years ago, we first went to Durban for the Sharks International Conference. My entire presentation was made as an animation. I got some great feedback. Some of the older scientists mentioned they didn’t think it was the way we should do things, but I think people appreciate something that’s engaging.
EJ: What’s your favourite species of shark?
RK: This has changed a couple of times over the years. The first shark I ever saw while diving was a leopard shark, or zebra shark depending on where you are in the world. I was just fascinated. The shark just sat on the bottom, not moving, and was so chilled out. I managed to get right up to it and it wasn’t bothered. That got me really interested in learning more about sharks. When I started my Ph.D. in Australia, I worked with Port Jackson sharks. They’re adorable and quite different from other species with they’re boxy heads and spines. We had a facility where we were working with baby Port Jackson sharks and that’s when I feel I love with them.
EJ: What do you think of the epaulette? They look so interesting.
RK: We’ve actually done some work with epaulette sharks and they’re amazing, but a bit tricky to handle. They have long, slender bodies, but are incredibly strong. When you need to handle them, they’ll completely coil up so it makes behavioural work a bit difficult. They’re great sharks though, really beautiful and I love how they can walk on the ocean bed and come out of the water.
EJ: Have you worked with the benthic sharks we have in Mossel Bay?
RK: No I haven’t, but I do love your pyjama sharks.
EJ: When we work with the benthics like the leopard catsharks and sometimes the pyjamas, they often coil up like the epaulette, making it difficult to measure them.
RK: I’d love to do some work with them. Hopefully there’s potential to come out here with some students in the future to study them.
EJ: There doesn’t seem to be a lot known about the benthics from a conservation standpoint.
RK: They don’t get the attention of the big, charismatic sharks like the white sharks.
EJ: What can you tell us about your past and / or current research?
RK: All of my research on sharks has been focused on the sensory biology. I started looking at the electro-sensory system. At the very beginning it was from a morphological point of view… gross anatomy like the pores for ampullae of lorenzini and how that differentiates between species. I did a large study in the beginning with over a hundred different species of sharks and rays where we compared the arrangement of the pores. We tried to understand what that meant for feeding behaviour. We came to some conclusions, but now we’ve started to dive a bit deeper to discover how the species differ in terms of the connection to the brain. This has naturally evolved into the shark deterrent work we are currently doing. A lot of the deterrents work on the electro sensory system, like Shark Shield and Surf Safe. However no one’s actually looked at how the sensory system works. We know it helps them with feeding and that they can detect electrical fields, so there are papers on that. But there’s a middle ground to say that we have this technology that seems to deter them, but how does it actually work? That’s now where our research is going, to better understand the technology currently available and to see how it works. Also, to develop some novel technology, so new devices that would not only work on the electro-sensory system, but other senses as well. Most of the research we’ve done in Mossel Bay is with deterrents and we’ve looked at a range of electro-sensory deterrents, plus visual deterrents using lights and strobe lights, and even sounds and smells. We’ve focused on white sharks as this is the top species involved in fatal attacks. If we can find a suitable deterrent for a white shark you’re pretty much covered. Most attacks by other species are not fatal.
EJ: Do you find that when testing deterrents on e.g. a white shark here and a tiger shark in Australia, that the response is the same?
RK: No, there’s definitely differences between the species. In the case of electro-sensory deterrents anyway. When you look at the number of electro-sensory pores on a white shark, it’s around 700. A tiger shark has around 1,000 and a hammerhead has around 3,000. You can imagine that such huge differences in the number of pores in the system means that surely they must use the system differently. There’s a whole range of other differences that separate the species. On the limited research we’ve done on a number of different species, hammerheads, tigers, white sharks and a bunch of reef species, they certainly respond in different ways. One deterrent we’ve had particular success with is the shark shield. We’ve just published research that will come out soon and that’s shown great success with the white sharks and also great potential with the other species. We have observed notable differences in the way the different sharks approach Shark Shield, how long they stay around etc. It will be good to finalise the data on the other species to see these differences in a research paper.
EJ: Seems like the research is a long process…
RK: Yes, so much to look at and so much data to process. But we’re getting there.
EJ: Is there a reason you pick Mossel Bay for some of the aspects of your research as opposed to other known white shark areas of the world?
RK: Australia is known to have white sharks, especially South Australia. There seems to be a disconnect between how many sharks there are and how many that people think there are. In Australia, they are spread far apart. You may get them all along the Southern coast, but not in a concentrated area. We initially tried to do our research in Australia, and with the tiger sharks and reef sharks it was great, we found those no problem… well it took us a long time to find them, but we got the numbers we needed. Then, we went down to South-West Western Australia and in four days, we only got one white shark who just passed by briefly. We had known Enrico [Enrico Gennari, Director of Research for Oceans Research] for a while and he was a bit shocked when we explained our lack of white shark encounters, telling us how he was sometimes seeing 10 to 20 a day within 10 minutes of anchoring the boat. So, we came here two years ago and couldn’t believe the activity. For our data purposes, we got what we needed in just a couple of weeks.
EJ: What’s unique about here is that a lot of the time, you only have to travel 10 minutes from the harbour to find the white sharks.
RK: The access is brilliant and the conditions are also amazing with the calm seas. We were used to the huge swells and harsh winds when being at sea in Western Australia on a tiny boat and deploying our equipment out there can be really trying. When we came here it was a luxury to have this calm bay, with a short boat ride then being surrounded by white sharks almost instantly.
EJ: What has been your most important scientific finding?
RK: My personal favourite and most interesting discovery was when we were working with baby bamboo sharks. Again, we were focused on the electro-sensory system. We were looking at the point during their development that they could detect electrical signals. Bamboo sharks are born in an egg case and for a period of time, they’re fully gown but bound to the egg case. So, we monitored these baby sharks while they were developing in the egg, and periodically over that time, we would stimulate them with an electrical signal to imitate a large shark. Up until a point in their development there was no reaction at all as they wouldn’t have developed the neural connections to activate the sensory system yet. Then, there was a key point when they would start to react and we were able to corroborate that through other research to show it was the point at which the neurons would connect to the sensory system. So, the behavioural side and anatomical side completely aligned. The great thing was this innate behaviour. When they sensed what they thought was a large predator, they would completely freeze and they would stop breathing.
EJ: Play dead?
RK: Well, normally a reaction to a predator would be fight or flight, but since the sharks are in a little egg case, they’re best chance is to stay really still so that they won’t be noticed. There was a limit to how long they could stop breathing though. We observed the breathing patterns through their gill movements. After a minute or so of not breathing they must resume breathing, and it was interesting to observe that first breath as it was almost like a big inhalation and the gills would open really wide.
EJ: How were you able to observe this behaviour?
RK: We had the eggs hanging in a tank and lights behind them, which would shine into the egg to show the inside, plus cameras set up to record them. The eggs were all at different stages of development.
EJ: What has been your biggest challenge?
RK: Mainly accessing the animals. When we started we were mostly lab based and all our work would be carried out in the lab or aquarium. Then, we progressed to field work using remote cameras and different equipment, but taking what we had been doing in the aquarium and trying to do it in the field. When we first tried to do this, it took a while to get the sharks to interact with our equipment. We ended up with hours of footage of blue water and couldn’t understand why the sharks wouldn’t interact with the cameras. The sharks were very camera shy and didn’t seem to like our big equipment clanking around. So, we ended up adapting our equipment. We used to have the cameras hanging in the water with horizontal cameras, so we changed it to vertical cameras and could then have the bait held further away as the bait being too close to the cameras is what seemed to put them off. Over the years, we have developed the equipment even further and have even tried to make it quieter. We keep everything tightly bolted so nothing is clanking around. It was a learning curve, but now the equipment works really well.
EJ: How do Oceans Research fit in with your research?
RK: At the moment they’re integral. Not just with providing access to the white sharks, but also with all the help we get from the interns. We used to have a much larger team and the last time we were here we were testing seven different types of deterrent. We were swapping the researchers around each day to give everyone a chance in the field. After that we realized we don’t need to take the entire lab with us on a research trip. So, this time, we’re here with just three of us. Through Oceans Research we have access to many interns who are keen to be involved in interesting field studies. The interns have been great and kept us on our toes with some thought-provoking questions.
EJ: Do you hope your research will aide in shark conservation?
RK: Yes, absolutely. Particularly, just now with the shark deterrent work. The paper we have written that will be coming out in a couple of days will certainly feed into conservation. Finally there is a deterrent on the market that has been well tested and researched, and actually works. We know that culling doesn’t work. We know that it’s not effective. We had three years of culling in Western Australia and now they’ve finally accepted that it’s an ineffective method. Now, the best thing we have is a Shark Shield. If you want to be in the water and you’re worried about sharks, take a Shark Shield. At least now people have a solution. Just saying ‘don’t go in the water’ isn’t really fair. Now we can say ‘you can go in the water, just take a Shark Shield’. I hope this deterrent will have a big impact and tone down the calls for culling sharks. Beyond that, we’re expanding into other types of deterrents. Particularly from an area-based point of view, such as trying to keep sharks away from areas like beaches.
EJ: It seems unfair that sharks always get the bad name when an incident occurs, even when the person involved in the incident was warned that sharks have been spotted in the water.
RK: Absolutely. Some of the other research we’re looking at, that we should hopefully be able to publish later this year, is what initiates a shark attack… what makes sharks bite. One of the things we’re looking at is how do we compare to seals, as it’s often said we look like a seal in the water. Our research group developed an ‘artificial shark’s eye view’ of the world that takes in to account the resolution and acuity of a range of sharks. So, how they would view e.g. a swimmer, seal or surfer. You look at us and think how could we look like a seal? But, when we look at it from a shark’s perspective in 10 or 15 feet of water, do they start to look alike? We have students back in Perth analyzing data and they will be able to say for sure once the research is complete. If, indeed, it comes out that they do look alike, then we can take this further to improve deterrents such as using lights or maybe some kind of pattern on surfboards or wetsuits.
EJ: Say I never travel by car or plane, I’m never in a position to be around dangerous land animals, coconut trees, lightening spots or any other fatal objects compared to shark incident numbers, how dangerous are sharks?
RK: My personal point of view isn’t that sharks aren’t dangerous. Some sharks are in fact dangerous. I would never recommend that anyone swim with a white shark or a tiger or bull shark as they are the three most dangerous. The reality is that we are not on the menu. We are the complete opposite of what a shark’s typical food source is. So, it’s likely that bites stem from a case of mistaken identity. So, in that sense, it’s probably a good idea to take precautions where possible such as proven deterrents like Shark Shield.
EJ: Why should they be protected?
RK: Sharks have a really important role in ecosystems. They are also very diverse, which is something that’s often forgotten about. There is a whole range of sharks. People think ‘why should I protect sharks if they eat people’. There are over 500 different species of sharks that all have an integral role in different environments. In almost every marine environment you can think of, there will be at least one species of shark that plays a role in maintaining that ecosystem. So, it’s really important that we’re taking this into account when we look at marine protected areas etc. We need to understand their role in that environment, which is the same for any fish really. We need to look at what would happen if that fish or shark, and that role is removed. White sharks get a lot of the attention as they’re so charismatic. They’re usually the main shark shown on Shark Week. So everyone thinks we need to protect them, which we certainly do in many places in the world, but there are also places where they’re doing absolutely fine and need no protection at all. We just found out that the California population of white sharks are doing great so really they don’t need the money that goes towards their protection. That money can be better spent on sharks that really do need protecting. The general public can use the IUCN list to get an idea of where to help as it’s a great source for identifying species that need protecting.
For information on Oceans Research and their internship opportunities visit www.oceans-research.com.
Tips for… Refreshing Skills
A hugely important subject, and one that should be considered by any diver regardless of your training level. Just like anything, sometimes life gets in the way, we get sidetracked and before you know it, it’s been 2 months out of the water. It may not seem like a lot, but we naturally start to forget things when they are not used. We slow down our actions as we are out of practise and have to think a little more in order to retrieve the information to help make decisions.
There’s nothing wrong with this of course, we cannot always be diving! But it is important that we refresh before getting straight back into it. We obviously conduct a lot of refresher courses here at the dive centre, but we are also realistic, knowing that not everyone will want to pay to refresh their skills with an instructor. That’s also fine too, just be sensible.
Our tips for this would be the following; some will likely seem a little common sense… but it’s always good to have a reminder right?!
First off, when getting back to diving, choose a buddy that you usually dive with or someone that has a higher level of competency in diving. This will give you the reassurance in the water and not have to be worrying about the others person whilst getting back into it yourself.
Secondly, choose a site that you know. Don’t be jumping straight in having seen an amazing new site that you want to try out… that can wait for another time. You have already had a break in your actual diving, without having to then also consider navigating and a new dive plan.
Next, try to leave out the brand new equipment. It’s great that getting back into diving you have decided to buy yourself a new drysuit, fins and BCD, but it all might be a little bit much. Let’s concentrate on just getting back into the water and then move onto those new additions. This kind of change can make even the best of divers anxious.
Last but not least, there’s nothing wrong with staying shallow. Our first dive to get back into it, does not need to break our dive depth record. Stay shallow, enjoy the marine life at this depth, and keep the dive nice and easy. Practise those skills if you would like to, make sure you know where all your equipment is positioned and get comfortable. The ocean isn’t going anywhere… there’s always tomorrow to get in for another!
Find out more at www.duttonsdivers.com
The Big Shark Pledge: Shark Trust’s new campaign kicks off with a call for support
With the ink still drying on last week’s landmark listing of nearly 100 species of sharks on Appendix II of CITES, the Shark Trust insists that this is not the time for shark conservation to take a break. The UK-based NGO this week launches its biggest-ever concerted campaign to tackle the overfishing of oceanic sharks. They are calling on people across the world to join the call for stricter controls on high seas fisheries.
The Big Shark Pledge is at the heart of an ambitious set of campaign actions. Working to secure science-based catch limits on all sharks and rays affected by the international high seas fishing fleet. The pledge will build the largest campaigning community in shark and ray conservation history to support a raft of policy actions over the vital years ahead.
Many of our best known and much-loved sharks make their home on the high seas. In our shared ocean, these oceanic sharks and rays face a very real threat from a huge international fleet of industrial-scale fishing vessels. Research published in early 2021 confirmed that over three-quarters of oceanic sharks and rays are now at risk of extinction due to the destructive impact of overfishing. They have declined by 71% over the last 50 years.
The Shark Trust is celebrating its 25th Anniversary this year and has a long history of securing positive changes for sharks, skates and rays. The Big Shark Pledge will build on the success of their NoLimits? campaign which underpinned landmark catch limits on Blue Sharks and Shortfin Mako in the North Atlantic.
“While the listing of so many species on the CITES trade agreement is certainly a positive step, there remains a huge challenge in ensuring that sustainable practices are embedded in international fisheries.” says Shark Trust Director of conservation, Ali Hood. “Sharks on the high seas face extraordinary pressure from excessive fishing practices. This has to be addressed through international agreements such as those secured for Blues and makos.”
There is hope and a feeling of momentum in the shark conservation community. Just last week, in addition to the new CITES listings, the Shark Trust, working with partners in the Shark League, secured the first-ever international quota for South Atlantic Mako at ICCAT meeting in Portugal. The new campaign from the Shark Trust aims to push forwards from here, engaging a wave of support through the Big Shark Pledge to bolster policy action.
This will be a long-term international and collaborative effort. Forging a pathway to rebuild populations of high-seas sharks and rays. By putting science at the heart of shark conservation and fisheries management. And making the vital changes needed to set populations on the road to recovery.
Shark Trust CEO Paul Cox says of the Big Shark Pledge “It’s designed to give everyone who cares about the future of sharks the chance to add their voice to effective and proven conservation action. By adding their name to the Pledge, supporters will be given opportunities to apply pressure at key moments to influence change.”
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