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Initiative aims to improve farmed lobster survival rates

The Fish Site
by The Fish Site
28 April 2022, at 12:00pm

A new design of container that aims to significantly improve lobster survival in hatcheries is currently under development by Marine-i and the National Lobster Hatchery.

a lady sitting on a rock
Dr Carly Daniels, research and development manager at the UK's National Lobster Hatchery

Part funded by the European Regional Development Fund, Marine-i aims to help the marine technology sector in Cornwall and the Isles of Scilly. The National Lobster Hatchery is a marine conservation, research and education charity based in Padstow, Cornwall. Their work is specifically related to a commercial species – the European lobster. A vital element of the National Lobster Hatchery’s work focuses on the larval stage of the lobster lifecycle. In the wild, the survival rate at the larval stage is very low. The National Lobster Hatchery seeks to improve survival at this early, vulnerable stage of the lobster’s life and release them back into the wild at an age where they are less vulnerable and more able to fend for themselves.

A female lobster can carry in the region of 20,000 eggs under their abdomen. However, on average only one of these is expected to survive in the wild. With skilful and careful application of modern technology, the National Lobster Hatchery can improve this survival rate by about 1,000 times.

“We currently use modified conical vessels to keep the larvae in suspension. Now, based on our own preliminary work, we believe that it may be possible to create an enhanced larval vessel with conditions that enable greater survival rates,” said Dr Carly Daniels, of the National Lobster Hatchery, in press release.

Marine-i is working with National Lobster Hatchery to develop an innovative prototype for testing.

“We are carrying out exhaustive research into the best materials to deliver the ultimate aim of improved lobster larval survival. We are aiming for materials to be sustainable and recyclable, as well as sufficiently robust to withstand the rigors of the marine environment,” explained Ruadan Geraghty from Marine-i partner University of Plymouth.

The National Lobster Hatchery will test the prototype in the hatchery from the start of the new larval season in May 2022, with the help of Marine-i partner, the University of Exeter.

“If the new larval vessel is proven to achieve higher survival rates than the vessels we currently use, then we will look to move to large-scale production of the new vessels for future use. This would be a very exciting outcome. The National Lobster Hatchery is one of only very few organisations worldwide which is investigating how innovative improvements can be made in this area,” added Dr Daniels.

Professor Lars Johanning, Programme Director for Marine-i, added: “Marine-i are delighted to help accelerate this exciting innovation through the academic and research expertise within the Marine-i partnership. This could help meet the challenge of global food security for future generations as well as strengthen the local economy. If successful, the new larval vessel is likely to have worldwide applications, not only for use by other lobster hatcheries, but also for larval survival of similar crustacean species such as crabs and other lobster species.”