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Wrasse have been reared from eggs to adults.
Two Scottish salmon farming businesses have reported a ‘major breakthrough’ in research to control sea lice. Marine Harvest Scotland and Scottish Sea Farms have been working with the Institute of Aquaculture at the University of Stirling to produce farmreared ‘cleaner fish’, so-called because they eat naturally occurring parasites including sea lice from salmon. Over six years, the project team has bred wild-caught Ballan wrasse (Labrus bergylta) and raised the off spring from egg to adults of reproductive age. Now, in what is believed to be a world first, those off spring have produced their own eggs, which have successfully hatched, completing the life cycle of farming wrasse in a controlled environment. The team has gone on to successfully wean the wrasse larvae and fry from live food to a dry diet – another milestone that will give salmon farmers more control over the health and nutrition of farmed wrasse.
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