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Parental selection critical in European sea bass female-to-male ratio production

European sea bass parents that have been selected for growth for three generations also produced significantly more females than parents of wild origins, according to a study on factors affecting production of more females.

The Scottish Salmon Company awarded GBP £5 million for post-smolt R&D project

A four-year aquaculture research and development (R&D) project to be carried out and led by The Scottish Salmon Company’s (SSC’s) Applecross site in the northwest highlands, has been awarded up to GBP £5 million (about USD $6.6 million) in public sector funding. The R&D project, will focus on post-smolt innovation, with the central goal to increase smolt sizes from around 100g to 500g in an ecologically sustainable manner using recirculating aquaculture system (RAS) technology.

Vaccinated rainbow trout has limited survival improvement in reuse water: U.S. study

Exposure to reuse water or multi-pathogen challenge in rainbow trout (Oncorhynchus mykiss) production can initiate complex disease dynamics that can overwhelm both vaccination and host genetic resistance, according to a collaborative project between researchers at the United States Department of Agriculture (USDA) Agricultural Research Service at Virginia Tech and the Virginia Institute of Marine Science.

Anaerobic digestion of sludge from RAS: Challenges and potential solutions

Recirculating aquaculture systems (RAS) offer several advantages for fish farmers, including waste capture and collection systems to maintain optimal water quality. Once removed from the recirculation loop, however, waste solids must be managed, and are currently considered an operation expense. The generated sludge is, in reality, a valuable resource due to its high organic matter, nitrogen, and phosphorus content. Through the process of anaerobic digestion (AD), organic matter in aquaculture waste can be transformed into a renewable energy resource. » Read more

Citric acid and phytase supplementation on canola meal for rohu fingerlings

A study conducted at the University of Agriculture, Faisalabad, Pakistan showed that supplementation of citric acid (CA) and phytase (PH) in canola meal improved growth performance, nutrients digestibility, and body composition of the fish. The best performance was observed at the supplementation of 30 g/kg CA+1,000 FTU/kg PHY. » Read more

Mowi Chile uses Garware fabric against sea lice

Mowi Chile’s Huenquillahue research centre has been testing a high-quality fabric by Garware Technical Fibres Ltd. as a mechanical barrier against sea lice (Caligus rogercresseyisea) larvae. » Read more
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Aquaculture 2022

Feb. 28 - Mar. 4, 2022
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Aquaculture Africa 2021

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