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What made The Meg so big?

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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.

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Education

Carmarthenshire students celebrate A Level and A.S. results

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CARMARTHENSHIRE County Council wishes to congratulate all of the county’s students that are receiving their A-Level and A.S. results today, Thursday 18th August 2022.

Whilst this year has seen a return to exam-based results, following two years of assessment-based grading during the COVID-19 pandemic, students and teachers have still had to contend with the ongoing impact of the last 2 years.

A total of 98.6% of A Level students in Carmarthenshire achieved A*-E, which is higher than the 97.3% in 2019 when exams were last sat.

Across Carmarthenshire, a total of 40.1% of A level students have received A or A* this year, which is vastly higher than the 24.9% when exams were last sat in 2019.

After 2 years without examinations, students at AS Level also had the opportunity this year to show what knowledge they had learned and skills they had developed, through a combination of exams and assessments, applicable to different courses. 91.8 % of AS students in Carmarthenshire achieved A-E grades which, again, is higher than in 2019.

Cllr. Glynog Davies, Cabinet Member for Education and Welsh Language said: “Congratulations to every single student receiving their A-Level and A.S. results today. These young people and their teachers have worked extremely hard, within the uncertain climate that exists due to the pandemic, and they should be very proud, as am I, of their fantastic achievements.

“I would like to take this opportunity to thank the students, teachers and support staff of Carmarthenshire as well as their families for their hard work over the last two years.”

In a joint statement, Carmarthenshire County Council’s Chief Executive, Wendy Walters and Director of Education and Children’s Services, Gareth Morgans added: “Congratulations to our A-Level and A.S. students for their, well deserved, excellent results. The last two years have been very challenging for students, teachers, support staff, families and friends and we are grateful to everyone for their commitment and support to each other during this period.

“These young people are a credit to their schools and our county, and we wish them every success for the future.”

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Education

St. Michaels School celebrates excellent A-Level results

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St. Michael’s pupils with their A-Level results

ST. MICHAEL’S School, Llanelli, is extremely pleased to announce another year of successful A-Level results, with 80.2% of all grades awarded either an A* or A grade.

The vast majority of pupils have earned a place at their chosen university to study courses such as Medicine, Veterinary Medicine and Economics.

This is the first year that traditional exams have resumed since the Covid-19 pandemic began with the majority of lessons in the first part of the A-Level being delivered online rather than in a classroom environment. This makes the results even more of an achievement considering the circumstances.

Headmaster Mr Benson Ferrari said: “We offer our sincere congratulations to our outgoing Year 13 class on the publication of their A-Level results, demonstrating that our pupils have worked so hard despite the challenges of returning to a conventional assessment approach.

“They approached the situation with resilience and dedication, which has resulted in grades that are truly representative of their ability.  I am confident that they will all go onto achieve great things at university and in their working lives.  

“We wish them the best as they move to this new and exciting stage of their education.  The preparation which St. Michael’s has provided will be built upon, along with our values and principles providing a lasting framework to tackle the challenges ahead.”

In 2020, St. Michael’s School was awarded The Sunday Times Welsh Independent School of the Decade and this was in part due to the excellent exam results that the school receives each year. 

St. Michael’s was also ranked 13th in The Times 2019 Co Ed League Table for UK Independent Schools, which was the last time that the results were published. The school hopes that this year’s results will continue to secure their place in the 2022 league table which will be published later this year.

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Education

Funding for music education trebled to the tune of £13.5m

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EVERY child will have the opportunity to benefit from music education as part of the Welsh Government’s plans for a national music service, which will help ensure no child misses out due to a lack of means.

As the National Plan for Music Education is published, the Minister for Education has confirmed funding will be trebled, with £13.5m being invested over the next three years.

The plan will make access to music education fairer and more consistent across Wales, with a particular focus on learners from low-income households and those with Additional Learning Needs. Support will be available for children and young people to access and progress with music tuition, with learners from disadvantaged and under-represented groups supported to join music ensembles.

The plan includes a number of key work programmes such as:

A review on music tutors’ terms and conditions, to ensure they are treated equitably and are recognised properly.
A ‘First Experiences’ programme to offer children in primary schools a minimum of half a term of musical instrument taster sessions, delivered by trained and skilled music practitioners.
A ‘Making Music with Others’ initiative, including opportunities for children and young people in secondary schools to gain industry experience through working alongside musicians and creative industries
A new national instrument and equipment library to support access to a resource bank to be shared across Wales.
These programmes will be rolled out from September 2022, supporting schools and settings to give all children and young people from the ages of 3 to 16 the opportunity to learn to play an instrument as well as singing and making music in our schools and our communities.

The National Music Service will operate as a ‘hub’, with the Welsh Local Government Association co-ordinating the Music Service’s programmes with a wide range of organisations. It will help schools and settings in their delivery of the Curriculum for Wales and provide more diverse opportunities for children and young people to experience music outside schools and settings.

First Minister of Wales, Mark Drakeford and the Minister for Education and Welsh Language, Jeremy Miles, visited St Joseph’s Cathedral Primary School in Swansea to see a cluster of primary school children taking part in a ‘Play Along’ session led by Swansea Music Service.

First Minister Mark Drakeford said:

“The establishment of a National Music Service for Wales is an important commitment in our Programme for Government and I’m delighted that we are delivering on this pledge.

“Learning an instrument was a formative part of my upbringing and a lack of money should not be a barrier to any young person who wants to learn to play music. We are fortunate in Wales to have a strong tradition of school, county and national ensembles, and we want to make sure that our children and young people are able to play a full part in these. This funding will support music services in schools and within the community to help nurture our young musical talent.”

The Minister for Education and the Welsh Language, Jeremy Miles said:

“Our vision is for all children and young people across Wales, regardless of background, to have the chance to learn to play an instrument. The plan we are publishing today, backed by funding, will help deliver that vision.

“For too long, the chance to learn an instrument and develop musical skills has been for those few whose families and carers who can afford tuition. I want to make sure everyone has the opportunity to access music tuition, and that’s why we’re making this significant investment to deliver a range of activities for our children and young people to learn and experience the joy of music.

“The development of the National Music Service will ensure that we nurture our next generation and continue to produce new talent and showcase Wales to the world.”

WLGA Chief Executive Chris Llewelyn said:

“We are proud to work with the Welsh Government on delivering this vital service to children across Wales. Many families in Wales can’t afford an instrument, and this funding will go a long way to opening doors to children across Wales to have the opportunity of learning an instrument.

“Playing an instrument and reading music is a very important skill for a child, and music brings enormous joy to children. Local authorities believe that children across Wales will have better access to instruments, and this plan will develop many future talented musicians, and support pupils to develop their musical skills.”

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