Mussels as big as size 9 shoes set to reveal their secrets

May 16, 2013
Mussels as big as size 9 shoes set to reveal their secrets.

A diving expedition off the north coast of Scotland is set to discover the secrets of mussels as big as size 9 shoes.

The scientific diving team from Heriot-Watt University's School of Life Sciences is researching the habitat of the Horse mussel in Scapa Flow, Orkney.

The benefits of Horse mussel reefs

These huge mussels, as big as 25 centimetres long when adult, can live for up to 50 years in mussel beds which, in turn, provide an environment that is very rich in other species.

The team will look into methods for restoring the mussel beds when they are damaged, ways to monitor their environmental quality and the role of the mussel beds as habitats for fish and other . The researchers will also try and quantify the economic and other benefits provided by the Horse mussel reefs, compared to areas that are fished for edible species such as scallops and whelks.

Other Horse mussel reefs explored by the team include the largest found to date off Wick, which covers an area the same size as 380 football pitches and one in Wales that boasted nearly 300 different species and 5,000 individual animals in just 0.25sq metres (about the same size as two sides of A4). They included giant sun stars and brittle stars, millions of which carpet the Horse mussel beds.

The diving expedition

The team hopes to complete 100 dives over the next two weeks.

They also plan to dive on and around the famous WW1 wrecks of the German high seas fleet whilst living aboard Leask Marines' "Sunrise".

Accompanying the team is Richard Shucksmith, a wildlife and underwater photographer and writer, who will document the dives and life on board the .

Daily posts will go up on the team's Facebook page featuring stunning images captured during their dives this week and next.

Dr William Sanderson, Reader in the School of Life Sciences at Heriot-Watt University, said, "We're really looking forward to documenting these off the coast of Orkney where tens of billions of organisms can be found living on just one Horse mussel reef. The giant Horse are fascinating creatures though you would not necessarily serve them up as a gourmet treat!

"Due to their longevity, they're not really edible. They are rumoured to be quite tough and probably have quite a lot of muck in them, but their age is also a fantastic way for us to discover clues about the environmental quality of their habitat and what we can do to protect these cold water reefs from damage."

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