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Trinity Researchers Tag Basking Sharks in West Cork to Learn More About Ocean’s Second Largest Fish

13th May 2021
TCD researchers prepare to tag a basking shark under the water off the West Cork coast
Trinity researchers prepare to tag a basking shark off the West Cork coast Credit: TCD

Researchers from Trinity’s School of Natural Sciences were in West Cork earlier this month to tag some of the many basking sharks that have been frequenting our shores — and learn more about the second largest fish in the world’s oceans.

Funded by the Irish Research Council and Science Foundation Ireland, Assistant Professor Nicholas Payne and PhD candidate Haley Dolton spent a week on the water with West Cork Charters in which they managed to apply tags to four basking sharks.

These electronic tags will accumulate data about the sharks’ behaviour and physiology as they move around the coast feeding on plankton.

The goal, the researchers say, is to learn more about the anatomy and physiology of these gentle giants and hopefully guide conservation efforts for this endangered marine wildlife species.

“Basking sharks are a difficult species to study because they are not very abundant and they only grace our shores for a brief period each year, from April to August, so I am delighted we were able to learn so much about them this past week,” said Dr Payne.

Sadly the first phase of the pair’s work involved dissecting the remains of two basking sharks that washed up on the West Cork coast at the end of April, as previously reported on Afloat.ie.

“We would rather not have have had the opportunity to examine the two sharks that died prematurely before we took to the sea, but these sad events did at least help us learn more about them,” Dr Payne explained.

“Basking sharks are an endangered species and at risk of death from fishing bycatch and from getting struck by boats, so the more we know about them — especially their behaviour and physiology — the better chance we have of protecting them.

“The experience we had of observing live sharks in all their glory really emphasises that we should do our best to protect these incredible animals.”

Dolton added: “The amount of data we managed to collect throughout the whole week was phenomenal and beyond what I’d hoped for. We are currently analysing all the results and look forward to sharing our findings with everyone later in the year.”

Published in Sharks, Marine Science
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Marine Science Perhaps it is the work of the Irish research vessel RV Celtic Explorer out in the Atlantic Ocean that best highlights the essential nature of marine research, development and sustainable management, through which Ireland is developing a strong and well-deserved reputation as an emerging centre of excellence. From Wavebob Ocean energy technology to aquaculture to weather buoys and oil exploration these pages document the work of Irish marine science and how Irish scientists have secured prominent roles in many European and international marine science bodies.

 

At A Glance – Ocean Facts

  • 71% of the earth’s surface is covered by the ocean
  • The ocean is responsible for the water cycle, which affects our weather
  • The ocean absorbs 30% of the carbon dioxide added to the atmosphere by human activity
  • The real map of Ireland has a seabed territory ten times the size of its land area
  • The ocean is the support system of our planet.
  • Over half of the oxygen we breathe was produced in the ocean
  • The global market for seaweed is valued at approximately €5.4 billion
  • · Coral reefs are among the oldest ecosystems in the world — at 230 million years
  • 1.9 million people live within 5km of the coast in Ireland
  • Ocean waters hold nearly 20 million tons of gold. If we could mine all of the gold from the ocean, we would have enough to give every person on earth 9lbs of the precious metal!
  • Aquaculture is the fastest growing food sector in the world – Ireland is ranked 7th largest aquaculture producer in the EU
  • The Atlantic Ocean is the second largest ocean in the world, covering 20% of the earth’s surface. Out of all the oceans, the Atlantic Ocean is the saltiest
  • The Pacific Ocean is the largest ocean in the world. It’s bigger than all the continents put together
  • Ireland is surrounded by some of the most productive fishing grounds in Europe, with Irish commercial fish landings worth around €200 million annually
  • 97% of the earth’s water is in the ocean
  • The ocean provides the greatest amount of the world’s protein consumed by humans
  • Plastic affects 700 species in the oceans from plankton to whales.
  • Only 10% of the oceans have been explored.
  • 8 million tonnes of plastic enter the ocean each year, equal to dumping a garbage truck of plastic into the ocean every minute.
  • 12 humans have walked on the moon but only 3 humans have been to the deepest part of the ocean.

(Ref: Marine Institute)

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