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Cornwall Seal Group Research Trust

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An interview with Sue Sayer by Jeff Goodman

For me, one of the greatest joys of diving is watching and interacting in some way with wildlife, be it a small crab or a gargantuan whale. Here in the UK one of the most endearing and charismatic marine animals is the Grey Seal. Watching them from the shore or a boat gives tantalising glimpses of their secret lives as they bob nose up (‘bottling’) in the water, either resting after hunting for food or simply relaxing and enjoying the warmth of the sunshine. But if you snorkel or dive, then these encounters can take on a whole new perspective.

Seals are naturally curious but wary of people and will more often than not remain just at the limit of your vision, giving a brief sighting as they glide by. There are places where seals are used to human presence, either in boats or underwater and it is here that encounters can become very special. One of the great highlights of being underwater with seals is when they show no fear of you at all and want to play. Even thinking about it brings a big smile as I write this.

Globally, the Grey Seal is one of the rarest seal species and about 34% of the world population lives in British and Irish waters www.smru.st-andrews.ac.uk/files/2018/01/SCOS-2017.pdf They are often persecuted by salmon farms and are susceptible to overfishing, plastic pollution, disturbance and all the other issues facing our marine life today.

Image: www.cornwallsealgroup.co.uk

Cornwall Seal Group Research Trust (CSGRT) run by Sue Sayer is a multi award winning, evidence based conservation charity supporting a large network of active citizen scientists. They routinely survey seals on their local patch in order to learn more about our globally rare marine mammal, Atlantic Grey Seals, for which the UK has a special legal responsibility to protect (JNCC). Find out more at www.cornwallsealgroup.co.uk

I asked Sue to tell me more of the group and the work they do.


Jeff: Hi Sue, thanks for taking the time to talk with me. Firstly can you tell me how you first became interested in seals?

Sue: I have always loved the sea and have been fascinated by seals since my teens in Scotland. I moved to Cornwall in 1991 but it took me nine years and my first pair of binoculars to discover seals here. In 2000, I heard a phrase that changed my life…’every seal has a unique fur pattern’. Since 2000 I have been photo identifying grey seals – first in Cornwall and now across the SW.

Jeff: Did you start the Cornish Seal Group or take it on from someone else?

Sue: Along our beautiful coastline, I had met quite a few people interested in seals, so in 2004 I set up CSGRT and we had our first meeting in my house and initially we met every two months. We soon outgrew my lounge and met in my workspace and by 2008 our meetings were monthly – we meet on the first Wednesday of every month at the Inn for All Seasons in Redruth.

Jeff: Can you tell me the main aim of the group and what you are hoping to achieve and indeed what you have achieved so far?

Sue: CSGRT is a volunteer led charity doing citizen science marine research around the SW of England to learn more about our grey seals, other marine life, human activity and the impacts they face. We want to improve the quality of our precious marine environment to give us and grey seals a better chance of surviving and thriving – environmentally, socially and economically. Our aim is to have a network of local seal research hubs right around our coast, learning about and being ambassadors for seals, keeping eyes and ears out for them and giving seals a voice in a world where money talks loudest.

CSGRT research achievements include showing that:

  • the general concept of a seal colony is misleading – on a single survey, seals at one site on the north Cornish coast had also been identified in four England counties (Cornwall, Devon, Dorset and Somerset) and four nations (England, Wales, Ireland and France). So seals in Cornwall are part of a Celtic Sea seal population
  • seals show seasonally repeated site fidelity and migration routes between an individual seal’s favourite places. One adult female ‘Ghost’ had 15 pups in 15 consecutive years on exactly the same beach but we do not see her around the SW for the rest of the year
  • seals in the SW have the second highest rate of entanglement for any phocid seal species anywhere in the world

Conservation achievements include:

  • getting seals at the two key mainland haul out sites in SW England protected under Special Site of Scientific Interest legislation making it a criminal offence to damage, destroy or disturb them
  • giving seals a voice in marine policy and planning consultations nationally to minimise human impacts
  • setting up our network of amazing volunteer hubs across Cornwall and Devon
  • supporting seal related organisations across the UK with advice and guidance
  • representing seals internationally with organisations such as World Animal Protection, the Global Ghost Gear Initiative and the Pinniped Entanglement Group.

Jeff: Why seals and not any other marine species?

Sue: I soon realised that grey seals are the underdogs of the sea – less well researched or represented than cetaceans, so I made it my life’s passion to learn more and share what I discovered with others to help everyone to help seals better! They are iconic, charismatic and furry with fascinating psychology / behaviour and of course they are beautiful! I love them!

Jeff: I assume that most people involved with the group are volunteers. How many people do you have and how do they participate in the work you do?

Sue: In 2018 alone, CSGRT received 3497 seal records from 347 different volunteers covering 282 locations. From this, volunteers analysed 113616 photos resulting in 7829 seal IDs. Volunteers in each seal hub perform a variety of roles from surveying; photo processing; creating albums for each survey; photo identifying individuals; running the ID catalogue; data recording, analysis and presentation for report writing; public events and engagement; seal championing and fundraising. We always welcome new volunteers do any one or more of these roles – you just need good IT skills, some time on your hands and an eye for detail.

Jeff: Is it a good broad selection of people who help the Seal Group. People from all walks of life. Are they mainly young or older?

Sue: Our volunteers are super talented of all ages and from all walks of life. They all have amazing personal back stories from ex nimrod pilots to midwives, marine conservation students and school pupils. Each one has skills and talents to contribute in a very wide range of ways. You just need to love seals and want to take action to help them.

Jeff: When watching any animal for a length of time, I am often taken by surprise by behaviour I have never seen or heard of previously. There is so much more to learn about other species on this wonderful world even if we often think we know it all. Can you recall any memorable surprise moments while watching Grey Seals?

Sue: I am always surprised by their individuality. I love watching their behaviour and communication much of which (like us) seems to be through body language. I am mostly gobsmacked by their resilience to survive despite living in a harsh environment – our Atlantic coast and the increasing impacts humans are having on this.

Surprises include:

  • During a post mortem being conducted by vet pathologist James Barnett, we discovered that seal tissue and skin was capable of healing over monofilament net embedded deep in their necks, effectively masking the original entangling material. In each of the last 3 years, CSGRT have recorded around 100 different seals with evidence of previous or current entanglement.
  • Receiving a video from a member of the public (Matt Halkes) of an adult grey seal demonstrating new behaviour actively herding sandeels (their favourite fish) up towards the end of a narrow gulley.
  • Getting underwater footage from a diver in the Isles of Scilly (Dave McBride) confirming that grey seals can suck their prey into their mouths in addition to the previously recorded ‘telescoping neck and jaw snatch’ method

But as you quite rightly pointed out there is no substitute to watching natural animal behaviour. I love that some seals seem bold whilst others are shy. On arriving at a haul out beach a bold seal might surf straight onto the beach, whilst a shier one might patrol just offshore apparently smelling and looking to see what is what, and who is where. Once ashore, seals may snuffle the sand, presumably scenting which beach it is on and which seals have been there (our theory is that each beach smells differently from its bacterial composition). A seal may then approach (or avoid depending on their personality) other seals by politely ‘saying hello’ by sniffing its neighbour’s ears gently. This may result in a friendly reaction or a recoil…the latter a probable response to meeting a seal they have not had a good experience with before. Amongst friends, a seal will quickly find a comfortable spot to rest and settle, which usually involves a lot of yawning, stretching and face rubbing with their fore flipper which is massively cute.

Jeff: Do you dive or snorkel with the seals at any time or is it strictly above water observations?

Sue: I don’t ever feel the need to get up close and personal with seals in the sea or on the land, but then I am usually watching them through massive zoom lenses or telescopes. We don’t encourage people to deliberately seek out encounters with seals in the sea. But if you spend time in the water, seals will inevitably encounter and approach you. When this happens, I let seals take the lead on their own terms.  I allow them to come to me in the sea. Sometimes I need to be passive for them to feel brave enough to approach. Other times I need to be interesting (by talking to them) to spark their curiosity for the seal/s to remain. Whatever happens it is important to remain calm, yet assertive and my limbs to myself! Given a choice, seals will always choose flight over fight. But really nosey seals will explore me by mouthing my flippers and limbs. If this happens, I just keep still until they let go!

Jeff: I see from your web site you do several at-sea boat surveys. Do you do these all year round? Are your surveys mainly from boat or the shore?

Sue: We began boat surveys along a 115km of Cornwall’s north coast in 2011. We have three transects that we systematically repeat along the shore and via offshore islands. When we can afford it, we have done monthly surveys but currently we have reduced this to four surveys a year all year round, so a total of 12. Our boat survey transects show that seals are not evenly distributed along our shore, but are found in hotspots associated with haul outs with occasional individuals transiting in between. This has validated our point-based land based protocols which make up the bulk of our surveys. Anyone wishing to join in on our boat based surveys from Newquay and Padstow harbours should just email me. After three years of financing us, Patagonia have changed their funding criteria, so we are desperately looking for a new supporter to pay for our boat charter fees.

Jeff: As I mentioned in my introduction, seals and other marine life are suffering from all kinds of human pressure. What are the most common issues you think the seals are facing right now and how can we help?

Sue: We know seals are threatened by many cumulative impacts. In addition to the 100 live entangled seals we record suffering in lost fishing gear around the SW each year, DEFRA data shows that in 2015 alone 310 seals were estimated to be killed in accidental bycatch off Cornwall and Devon alone. Seals are also very heavily disturbed in the SW at potentially unsustainable levels. Just in 2018, 1230 seals were disturbed into the sea and that is just the ones that were reported to CSGRT. Seals haul out all year round every few days to rest, digest and replenish emergency oxygen supplies. So it is critical that we leave seals as and where we found them.

Jeff: It mentions on your web site that we occasionally get vagrant seal species visiting Cornwall, most notably hooded and harp seals. I never knew. Are these visits rare or getting more frequent as our seas are warming?

Sue: Most of our seals are grey seals, but we routinely record small numbers of common seals each year and anecdotally they do seem to be recolonising in the SW (presumably as a result of improving water quality). Other species that have been recorded in recent years are hooded, harp and ringed seals. Currently there is insufficient evidence to us to say if warming seas are having an impact. What we do know is that extreme weather events associated with climate change result in rockfalls that have killed seals on several occasions and blocked off breeding caves during the pupping season trapping mums and pups. As fish species are being affected, seals are bound to be impacted too.

Jeff: Warmer water visitors to Cornwall, of any species, often can’t make the return journey home and so sooner or later die prematurely. Are these vagrant seals similar?

Sue: We haven’t really had enough examples to know if vagrant species survive. Only the ringed seal was able to be rescued by British Divers Marine Life Rescue and taken to the Cornish Seal Sanctuary but after responding to treatment it died before it could be released.

Jeff: Part of your work is individual seal identification. Can you explain how that works and why it is necessary?

Sue: Each seal’s unique fur pattern, like our fingerprint, enables it to be identified for life. Know the pattern, know the seal. We look for ‘pictures’ in the pattern and use these as key words to identify them. We have seal ID volunteers around the SW who can all recognise seals by eye. Our ID protocol requires five matching fur patterns in the same relative positions preferably on both sides with the rest of the seal being consistent. What ‘pictures/shapes’ can you see in this seal’s fur pattern?

In 2018, eight seals that I first identified in 2000 were re-sighted, which for me is like the return of old friends. Some seals have been identified over 500 times and yet only a handful are known to spend the whole year in the same place. At some smaller haul out sites, a few seals will spend up to 6 or 7 months there and then go elsewhere for the rest of the year. The big haul out sites have no semi resident seals at all and are more like service stations on seal motorways.

Waves is an adult female we first met in 2007 when she had a seal pup on the north coast. She has been identified 35 times since by 13 different volunteer surveyors and a Looe Photo ID project survey team of 12. We have only seen her during the pupping season apart from in 2015 when we caught her in the moulting on the Roseland. We have recorded her having five pups in this time at three different locations. She has obviously not read the seal rule book that says she should have her pups where she was born!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Jeff: Delving further into your web site I see a great page on how to safely watch seals from both land and sea without causing unnecessary stress to the animals. Do you think people take notice of this or are many still too keen to get as close as possible, ignoring the question of animal welfare?

 

 

 

 

 

 

Sue: Pretty much all the disturbance I see has been unintentional – people not knowing what to do. Having said this, people do seem to just want to get closer and closer, trying to get the kind of amazing images and footage they see on TV. The best thing we can do for seals is watch from distance through binoculars. Ideally seals will haul out at high tide and remain there until they get floated off on the next high tide. At its worst, disturbance occurs when the seal is asleep at the high tide line but when the sea is at low tide. A sudden and close disturbance on land, or from the sea, will scare the seal into tombstoning from height and this is a classic way for it to break its bottom jaw or snap ribs. But disturbance is the key impact we can all do something about easily by just KEEPING OUR DISTANCE, downwind, quiet and out of sight. If a hauled seal is looking at you repeatedly, then you then you are too close.

Jeff: We could no doubt talk for a very long time about the Cornwall Seal Group Research Trust and so thank you for this short insight into the great work you are all doing. If people want to do similar in their own home areas of the world what advice would you give them?

Sue: Email me – sue@cornwallsealgroup.co.uk – and I am happy to signpost people to their nearest local group if there is one or a contact person on their patch if we have one.

Please always aim to tell us about a seal sighting you have anywhere in the SW with a date, location and the number of seals on land and sea. Photos are a bonus and mean we may be able to tell you more. We look forward to hearing from you and hope you all get to enjoy some amazing encounters with our wild, globally rare grey seals but always on their own terms!


Sue Sayer began photo identifying grey seals in 2000 giving her an unparalleled insight into their behaviour having spent thousands of hours recording them from land and sea. In 2004, Sue set up Cornwall Seal Group Research Trust (CSGRT), a globally-respected, independent, evidence based conservation charity (No. 1162936) with an active network of amazing and highly motivated volunteer citizen scientists around the SW monitoring seals on their local patch. Sue is a volunteer herself running CSGRT and her first book ‘Seal Secrets’ was published in 2012 (republished 2013). She routinely writes articles and reports for publication. She gives talks all over Cornwall and Devon and has presented at conferences in Europe and the USA. She has a reputation for inspiring and lively talks that engage even those who think they are not interested in seals! In 2017/2018 Sue won 3 prestigious awards from the Cornwall Mammal Group for outstanding contributions to the study, understanding and promotion of seals, an ‘Environment’ award from Cornwall Volunteers and an ‘Individual’ Cornwall Sustainability Award. Her current aim is to build a strong and talented next generation Ranger team for the future of marine conservation in the SW.

www.cornwallsealgroup.co.uk

Jeff is a multiple award winning, freelance TV cameraman/film maker and author. Having made both terrestrial and marine films, it is the world's oceans and their conservation that hold his passion with over 10.000 dives in his career. Having filmed for international television companies around the world and author of two books on underwater filming, Jeff is Author/Programme Specialist for the 'Underwater Action Camera' course for the RAID training agency. Jeff has experienced the rapid advances in technology for diving as well as camera equipment and has also experienced much of our planet’s marine life, witnessing, first hand, many of the changes that have occurred to the wildlife and environment during that time. Jeff runs bespoke underwater video and editing workshops for the complete beginner up to the budding professional.

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The Ocean Cleanup Breaks 10,000,000 KG Barrier

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ocean cleanup

The Ocean Cleanup, the global non-profit project, has removed a verified all-time total of ten million kilograms (22 million lbs.) of trash from oceans and rivers around the world – approximately the same weight as the Eiffel Tower.

To complete its mission of ridding the oceans of plastic, The Ocean Cleanup uses a dual strategy: cleaning up the Great Pacific Garbage Patch (GPGP) to remove the plastic already afloat in the oceans, while stopping the flow of plastic from the world’s most polluting rivers.

Through cleaning operations in the GPGP and in rivers in eight countries, the cumulative total of trash removed has now surpassed ten million kilograms. This milestone demonstrates the acceleration of The Ocean Cleanup’s impact, while underlining the astonishing scale of the plastic pollution problem and the need for continued support and action.

While encouraging for the mission, this milestone is only a staging point: millions more tons of plastic still pollute our oceans and The Ocean Cleanup intends to continue learning, improving and innovating to solve this global catastrophe.

This announcement comes as governments from around the world meet to continue negotiations to develop a new legally binding instrument to end plastic pollution at INC4 in Ottawa, Canada. Representatives of The Ocean Cleanup will be in attendance and the organization will be urging decision-makers to collaborate towards a comprehensive and ambitious global treaty which addresses plastic at all stages of its life cycle and in all marine environments worldwide, including in areas beyond national jurisdiction.

It is encouraging to see that the need for remediation is reflected in the various options for potential treaty provisions. It is essential that the final treaty contains clear targets for the remediation of legacy plastic pollution, and reduction of riverine plastic emissions.

Tackling plastic pollution requires innovative and impactful solutions. The treaty should therefore incentivize the innovation ecosystem by fostering innovations that make maximal use of data, technology and scientific knowledge – such as those designed and deployed by The Ocean Cleanup.

‘After many tough years of trial and error, it’s amazing to see our work is starting to pay off – and I am proud of the team who has brought us to this point.’ said Boyan Slat, Founder and CEO of The Ocean Cleanup. ‘While we still have a long way to go, our recent successes fill us with renewed confidence that the oceans can be cleaned.’

The Ocean Cleanup was founded in 2013 and captured its first plastic in 2019, with the first confirmed catch in the GPGP coming soon after the deployment of Interceptor 001 in Jakarta, Indonesia. After surpassing one million kilograms of trash removed in early 2022, the non-profit project has since progressed to the third iteration of its GPGP cleaning solution, known as System 03, and a network of Interceptors currently covering rivers in eight countries, with more deployments set for 2024.

About The Ocean Cleanup

The Ocean Cleanup is an international non-profit organization that develops and scales technologies to rid the world’s oceans of plastic. They aim to achieve this goal through a dual strategy: stemming the inflow via rivers and cleaning up the legacy plastic that has already accumulated in the ocean. For the latter, The Ocean Cleanup develops large-scale systems to efficiently concentrate the plastic for periodic removal. This plastic is tracked and traced through DNV’s chain of custody model to certify claims of origin when recycling it into new products. To curb the tide via rivers, The Ocean Cleanup has developed Interceptor™ solutions to halt and extract riverine plastic before it reaches the ocean. Founded in 2013 by Boyan Slat, The Ocean Cleanup now employs a broadly multi-disciplined team of approximately 140. The foundation is headquartered in Rotterdam, the Netherlands.

For more information, visit: theoceancleanup.com and follow @theoceancleanup on social media.

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Marine Life & Conservation Blogs

Creature Feature: Dusky Shark

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In this series, the Shark Trust will be sharing amazing facts about different species of sharks and what you can do to help protect them.

This month we’re taking a look at the Dusky Shark, a highly migratory species with a particularly slow growth rate and late age at maturity.

Dusky sharks are one of the largest species within the Carcharhinus genus, generally measuring 3 metres total length but able to reach up to 4.2 metres. They are grey to grey-brown on their dorsal side and their fins usually have dusky margins, with the darkest tips on the caudal fin.

Dusky Sharks can often be confused with other species of the Carcharhinus genus, particularly the Galapagos Shark (Carcharhinus galapagensis). They have very similar external morphology, so it can be easier to ID to species level by taking location into account as the two species occupy very different ecological niches – Galapagos Sharks prefer offshore seamounts and islets, whilst duskies prefer continental margins.

Hybridisation:

A 2019 study found that Dusky Sharks are hybridising with Galapagos Sharks on the Eastern Tropical Pacific (Pazmiño et al., 2019). Hybridisation is when an animal breeds with an individual of another species to produce offspring (a hybrid). Hybrids are often infertile, but this study found that the hybrids were able to produce second generation hybrids!

Long distance swimmers:

Dusky sharks are highly mobile species, undertaking long migrations to stay in warm waters throughout the winter. In the Northern Hemisphere, they head towards the poles in the summer and return southwards towards the equator in winter. The longest distance recorded was 2000 nautical miles!

Very slow to mature and reproduce:

The Dusky Shark are both targeted and caught as bycatch globally. We already know that elasmobranchs are inherently slow reproducers which means that they are heavily impacted by overfishing; it takes them so long to recover that they cannot keep up with the rate at which they are being fished. Dusky Sharks are particularly slow to reproduce – females are only ready to start breeding at roughly 20 years old, their gestation periods can last up to 22 months, and they only give birth every two to three years. This makes duskies one of the most vulnerable of all shark species.

The Dusky Shark is now listed on Appendix II of the Convention on the Conservation of Migratory Species (CMS), but further action is required to protect this important species.

Scientific Name: Carcharhinus obscurus

Family: Carcharhinidae

Maximum Size: 420cm (Total Length)

Diet: Bony fishes, cephalopods, can also eat crustaceans, and small sharks, skates and rays

Distribution: Patchy distribution in tropical and warm temperate seas; Atlantic, Indo-Pacific and Mediterranean.

Habitat: Ranges from inshore waters out to the edge of the continental shelf.

Conservation status: Endangered.

For more great shark information and conservation visit the Shark Trust Website


Images: Andy Murch

Diana A. Pazmiño, Lynne van Herderden, Colin A. Simpfendorfer, Claudia Junge, Stephen C. Donnellan, E. Mauricio Hoyos-Padilla, Clinton A.J. Duffy, Charlie Huveneers, Bronwyn M. Gillanders, Paul A. Butcher, Gregory E. Maes. (2019). Introgressive hybridisation between two widespread sharks in the east Pacific region, Molecular Phylogenetics and Evolution 136(119-127), https://doi.org/10.1016/j.ympev.2019.04.013.

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