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Submerging Atlantic salmon cages may do more harm than good

Some salmon producers may keep their cages fully submerged to keep sea lice at the bay, but results from a recent trial suggest that while this reduces lice infestations, it is detrimental to salmon welfare and production goals. Atlantic salmon producers may want to rethink plans to submerge sea cages as a lice prevention strategy, according to results from a new study published in the journal Aquaculture. In this trial, researchers fit three 1,729 m³ net pens with air domes and stocked them with approximately 6,000 salmon smolts. The researchers submerged the cages 15 m below the surface and tracked the salmon for […]

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Lighting trials show positive impact on shrimp performance

The use of artificial lighting has been shown to significantly increase shrimp survival and growth rates following a field trial in Vietnam. Loc Tran, the founder of ShrimpVet (Minh Phu AquaMekong Co), teamed up with Signify to investigate whether the addition of lighting can improve the stability of shrimp farming systems and produce more consistent shrimp yields. They trialled Philips AquaAdvance 260W Shrimp lights, which had been tailored towards shrimp using a patented blue and green spectrum. Click to read more: https://thefishsite.com/articles/lighting-trials-show-positive-impact-on-shrimp-performance […]

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The benefits of bakers’ yeast extend beyond growth promotion

A recent feed trial has found that supplementing Nile tilapia diets with bakers’ yeast (Saccharomyces cerevisiae) can change the fishes’ intestinal morphology, leading to improved nutrient uptake, immune responses and growth performance. Click to read more: https://thefishsite.com/articles/the-benefits-of-bakers-yeast-extend-beyond-growth-promotion […]

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Salmon producers can expect a prosperous 2022

The main salmon producing regions and companies can look forward to profitable 2022, with increases in both volumes produced and prices. “Norway was the big surprise in 2021. While an increase in harvests was expected, most people predicted they would only increase by 3, 4 or maybe 5 percent. But, by the second half of the year, it became apparent that this figure would be higher and we now think that Norway’s salmon production will be 10.2 percent higher than it was in 2020.” says Nikolik. Click to read more: https://thefishsite.com/articles/salmon-producers-can-expect-a-prosperous-2022-gorjan-nikolik-rabobank […]

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Could culturing river prawns protect people against a chronic disease?

In collaboration with local villagers and scientists, an international team of researchers are breeding and releasing freshwater prawns into the Senegal River in an attempt to combat a spiralling outbreak of schistosomiasis – a disease that has infected millions of West Africans. Click to read more: https://thefishsite.com/articles/could-culturing-river-prawns-protect-people-against-a-chronic-disease-schistosomiasis-senegal […]

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Can algal engineering help to tackle sea lice?

A previous feasibility study with Scottish Sea Farms, combined with international research, showed that the introduction of natural kelp on salmon farms can have medicinal properties and a calming effect on cleaner fish, boosting their ability to eat sea lice off the salmon. Click to read more: https://thefishsite.com/articles/can-algal-engineering-help-to-tackle-sea-lice […]

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