Our Marine World, by Dr. Louise Allcock

In the third of our weekly series of articles by NUI Galway researchers, Dr. Louise Allcock, Lecturer in Zoology and Ryan Institute Principal Researcher in Functional and Evolutionary Biology, writes about ‘Our Marine World‘ and her work exploring Ireland’s deep sea habitats.


The Real Map of Ireland: Image courtesy Marine Institute
The Real Map of Ireland: Image courtesy Marine Institute

You don’t need me to tell you that Ireland is surrounded by sea. But do you know how deep that sea is?

Close around Ireland, on the continental shelf shown in brown on the map above, it’s not very deep – around 200 metres or so. But at the edge of the shelf, the sea floor gets suddenly deeper, dropping to around 3 km deep in the Rockall Trough, and 5 km deep on the Porcupine Abyssal Plain.

Continue reading “Our Marine World, by Dr. Louise Allcock”

HABITATS: Atlas of Ireland’s Marine Mammals

The Real Map of Ireland

Image courtesy of the Marine Institute

Last week the Irish Whale and Dolphin Group published their Offshore Marine Mammal Atlas, which surveyed Ireland’s seas for whales, dolphins and seals. The Atlas took six years to complete, with researchers spending over 1,000 days at sea recording more than 3,300 sightings of 35,000 animals.

As you can see from the image above, Ireland’s seabed territory extends far into the Atlantic Ocean, but also contains part of the Irish and Celtic Sea, and taken together is called the “Irish Continental Shelf”. The island of Ireland covers 20,863,360 acres of land but can claim a marine and undersea territory over ten times greater than that, at a staggering 220 million acres. The UN Convention of the Law of the Sea grants Ireland the sovereign right to explore this area and to exploit its natural resources.

Celtic Explorer

Image courtesy of the Marine Institute

The marine mammal survey took over 5,000 hours of survey effort and was carried out on a variety of vessels, including research vessels (e.g. R.V. Celtic Explorer above), naval vessels (e.g. LE Roisin) and even car ferries (e.g. MV Ulysses). Researchers searched the seas ahead of the vessel by eye and using binoculars, typically on the deck but also on the “monkey island” (i.e. on the roof of the bridge) and the “crow’s nest”. Weather conditions and position data were automatically collected by the ship’s onboard computers and GPS. Continue reading “HABITATS: Atlas of Ireland’s Marine Mammals”