Connect with us
Advertisement
Advertisement

Education

What made The Meg so big?

Published

on

HAVE you ever wondered why the Megalodon shark became to be so big? Or wondered why some other sharks are much smaller?

In a paper published by Evolution, research led by Swansea University’s Dr Catalina Pimiento and co-authored by an international team of scientists from the UK, Europe and the USA examined the biological traits of all sharks and rays before running a series of evolutionary models to seek how gigantism evolved over time.

The results showed that for a shark to be giant, it would need to first evolve adaptations that enhance feeding such as the ability to control – at least to some degree – their own body temperature or become a filter feeder.

One of the most famous giant sharks, Megalodon – the topic of 2018 Hollywood film The Meg – was an active predator that could measure up to 18 metres in length and became extinct around two million years ago.

Meanwhile, the whale shark – which is still around today – can also reach 18 metres but isn’t an active predator. Instead, it is a filter feeder and eats tiny plankton from the sea.

These two subjects formed key parts of the research, which centred on the tree of life for sharks, where the authors mapped characteristics relating to body size, like their thermo-regulatory capacity, feeding mechanism and diet.

Researchers then found that sharks could become giants by following one of two possible evolutionary pathways; the mesothermic pathway, which consists of evolving the ability to self-control the temperature of their most important organs – or the filter-feeding pathway, which consists of evolving the ability to feed on microscopic plankton.

The mesothermic adaptation allows sharks to live in different types of habitats – including cold waters – and also hunt more effectively. The filter-feeding adaptation allows sharks to eat the most abundant food in the ocean – plankton.

However, there are risks involved for any shark following the evolutionary pathways that lead to gigantism.

The mesothermic species need to consume big prey to maintain their high energetic demands, but when these prey are scarce, giant sharks are more susceptible to extinction. The scarcity of large prey in times of rapid climatic change was the most likely cause of the extinction of Megalodon.

While the filter feeders have shown more resilience, they are at risk of eating large volumes of toxic microplastics that now can be found in the world’s oceans – thus threatening their extinction.
Dr Catalina Pimiento, lead researcher and Postdoctoral fellow at Swansea University, said: “Sharks provide an ideal case study to understand the evolutionary pathways leading to gigantism in the oceans because they display contrasting lifestyles and adaptations and because they have an evolutionary history of at least 250 million years.”

Notes:
Photo credit: Guillermo Torres. Banco de Imágenes Ambientales (BIA), Instituto Alexander von Humboldt.

Continue Reading
Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *

Education

Commitment to reducing single-use plastics in schools  

Published

on

CARMARTHENSHIRE County Council has committed to working with its suppliers to reduce the amount of single use plastic used in schools.

Councillors debated the issue at Full Council, following a motion by Cllr Bill Thomas which called for action to identify ways of moving away from plastic milk bottles in schools.

He said he was aware of children in local schools that want to see change, citing particular examples in Ysgol y Felin and Five Roads School, where eco committee members are demanding action.

He said: “In April last year, Carmarthenshire County Council unanimously passed a motion that included a call for the council to reduce single-use plastics in Council buildings and offices. That motion also called on the council to encourage schools to stop using single-use plastics and to start to use sustainable materials.

“Pupils in schools across our county have taken up this challenge. At the June governors meeting at Ysgol Y Felin, we were told that the school’s Eco Committee had requested non-plastic containers for their milk. When the school contacted the council they were told that the milk contract couldn’t be changed and that they had received no other interest in providing glass bottles.

“To support a campaign to reduce the use of single-use plastic in their school, Five Roads School has created a poster showing pupils drowning in plastic.”

Cllr Thomas was supported by Cllr Glynog Davies, Executive Board Member for Education.

“This underlines our opinion as a council,” he said. “Steps are already in place to reduce single use plastics in our buildings. We are aware of the damage plastic is doing to our environment. I would like to praise the excellent work that’s done in our Eco School Councils, and we are proud that our children are taking such interest in this.”

He added: “The solution is a complicated one, but we as a council can continue to encourage and support our schools as much as possible whilst we evaluate the alternative options, and full financial and environmental benefits. We have to do what we can to protect the environment.”

Continue Reading

Education

Pupil Language Ambassadors’ key role

Published

on

 

EACH year Pupil Language Ambassadors (PLAs) from schools across the ERW region work hard to increase awareness of the skills and opportunities, which come from studying a language amongst their peers. They speak in assemblies and to groups of their peers at school events. Their ambassadorial role is wide and varied and each year they work with their teachers to increase the number of pupils studying language at GCSE.

This year, the focus has been to utilise the skills of language ambassadors to work with primary school children where these committed linguists go into their nearby primaries and speak to key stage 2 pupils about the benefits of learning an additional language. This has helped to fulfil a crucial element of the national and regional priorities as set out in the work of Global Futures, a Welsh Government funded scheme to promote language learning for all.

In addition to their fantastic and creative work and projects, in March these motivated ambassadors attended the annual ERW Pupil Language Ambassador training at the Liberty Stadium in Swansea. They met with other ambassadors from across Carmarthenshire, Ceredigion, Neath Port Talbot, Pembrokeshire, Powys and Swansea to discuss their role and heaR from some inspirational speakers.

The purpose of the day was to help the pupils understand their role, to develop ideas for events they could run in their schools, to take part in language tasters and create a plan of action for supporting language learning in their school and their cluster.

The day began with a fantastic presentation from the Pupil Language Ambassadors from Ysgol Dyffryn Taf in Whitland. They spoke to the new PLAs about their achievements last year. They addressed the audience in many languages and set the tone for the day perfectly. The keynote speaker was Rhodri Bendle, Chief Consultant at Snowstyle Travel Company in Austria that specialises in Ski and Snowboarding holidays and tuition. He shared his own story about learning a German and how it has helped him to develop his own business.

Pupils then went into a series of workshops delivered by Routes Cymru, a team of professionals and student language ambassadors from Cardiff University who facilitated idea sharing and discussion about how to set up a language club and other ways of getting the message across about language learning.

Diane Evans, ERW, helped pupils to draw out their knowledge of the role of the ambassador across Wales and internationally. Pupils learned how to get their voices heard and how to make an impact in their time as language ambassadors in their community.

Alex Pickering represented the Goethe Institute at the event speaking with ambassadors about the importance of language in business. Ariane Laumonier, a consultant with the Institut Français ran a brilliant workshop on language and the world of work. Both Ariane and Alex used their own languages to convey the importance of learning a language and the benefits of developing multilingual learners.

Another aim of the day was to build confidence in ambassadors in learning and speaking an additional language. The language taster sessions from staff and postgraduate students at Swansea University all ran tasters that strengthen the priorities across Wales to learn and speak a new language. These were extremely well-received as always, pupils tried out languages that many of them had not learnt before including Polish, Italian, German and Mandarin.

Mererid Hopwood, Professor of Language at University of Wales Trinity Saint David inspired staff and students alike with her talk on the importance of striving for a Multi-lingual society in Wales with children and adults using their newly acquired language at every opportunity.

Continue Reading

Education

Local students shine at skills competition

Published

on

KATIE WAITE and Ben Thomas, from Pembrokeshire and Llanelli, have won a gold medal in the photography and coaching final of a national skills competition.

Backed by the Welsh Government through the European Social Fund, Skills Competition Wales is a series of events held in colleges across the country, designed to celebrate vocational skills and create highly skilled, talented employees for the Welsh workforce.

Katie, 18, who is studying foundation art, competed against 18 other students from across Wales in a photography challenge. The competitors were tasked with creating photography that focused on the theme discovering Wales.

Katie said: “I am over the moon to have won the photography competition.

“’Discovering Wales’ was the theme of the competition and we had to base our photography around the great outdoors, adventure and culture.

“I focused on the cultural aspect of the brief by looking at how the landscape of Wales reflects its culture.

“It was fascinating to see other people’s work at the competition and see how different people can interpret a brief and show their creativity in other aspects.

“I love photography as it can capture a moment in a unique way and shows another way of seeing things.”

Ben, 21, who is studying level two fitness instructing, competed against 17 other students from across Wales in a series of coaching challenges in within one hour. The competitors were tasked with coaching a one on one strength training session, warm up and circuit session.

Ben said: “Competing in the coach competition was a big success for me that has brought me closer to achieving my goal in making a real difference to people.

“Last year I was struggling with both my physical and mental health and turned to fitness. I got a personal trainer, Zak Hearne, who helped me lose three stone in three months which had a hugely positive impact on my mental health.

“Being able to make the same difference with other people is something I want to achieve in the future through personal training.

“For me, it’s all about pushing people to achieve great things and showing people that they can do anything if they put their mind to it and aim high.”

More than 40 competitions are taking place this year, across a wide range of different vocations from forensic science and fashion technology to 3D game and food preparation.

Those who are successful may then go on to be shortlisted for the UK Squad, competing against the world’s most talented young people at the WorldSkills international final in Shanghai, China in 2021.

Minister for Economy and Transport, Ken Skates said: “Skills Competition Wales is such an important event, allowing multi-talented young people the length and breadth of Wales to put their skills to the test, building on their excellence and experiences across various fields with the opportunity to then progress and compete at UK national and international level.

“It’s also an opportunity to show the breadth of talent we have here in Wales and to celebrate the Welsh companies who are nurturing and reaping the rewards of such highly skilled, talented employees. Ensuring Wales has the skills needed for economic success has long been a priority for me personally and for the Welsh Government more broadly and it’s fantastic to see skills acknowledged in this way.

“I would like to say well done to everyone who has competed this year and add my congratulations to Katie and Ben on their brilliant achievement. Best of luck to them in the next stage of the competition and I look forward to seeing them prosper in their future careers.”

Continue Reading

Trending

FOLLOW US ON FACEBOOK