Cryopreservation shows genuine promise for mussel farming

The Fish Site
by The Fish Site
17 August 2022, at 12:01am

A new study shows cryopreserved mussel larvae can survive and develop to adult mussels - a discovery that could help mussel farmers prosper even in years of poor natural spatfall.

Juvenile mussels from cryopreserved larvae settled in ropes with their growth being checked
Juvenile mussels from cryopreserved larvae settled in ropes with their growth being checked

The researchers found that the cryopreserved mussels grew as well as the control group © Pablo Heres and Estefania Paredes

A long-term study funded by the ASSEMBLE Plus project has shown that adult mussels can be grow from cryopreserved larvae without compromising the quality of the next generation’s offspring.

The Mediterranean mussel (Mytilus galloprovincialis) is one of the most farmed molluscs worldwide. This is the first time M. galloprovincialis spat produced from cryopreserved larvae were able to develop into adults at the same growth rates as control individuals, be cultured in a natural environment, and even reach average commercial size at the same time as control mussels obtained from non-cryopreserved larvae. Additionally, the viability of the produced adults is apparently unaffected by the cryopreservation process, with fertility and offspring quality comparable with those of control mussels.

Dr Estefania Paredes, from Universidade de Vigo, who led the research team that designed the cryopreservation protocol said in a press release: “Shellfish aquaculture needs the development of new tools such as this to reduce its reliance on natural spat collection whilst improving good practices and efficiently increasing production. The results signify strong evidence for the suitability of this cryopreservation method for use in mussel aquaculture and in research, where animals must be in optimal health.”

Open access details of the cryopreservation protocol are published in Scientific Reports, under the title Long-term study on survival and development of successive generations of Mytilus galloprovincialis cryopreserved larvae.