FEED & NUTRITION

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Microalgae found to boost broodstock and fry performance

Scientists have found that feeding Nile tilapia broodstock a diet including a type of microalgae can improve fertility, immunity and performance.

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Algal oil shows promise as fish-oil substitute in feed for young salmon

Algal oil can replace fish oil in the feed of farmed Atlantic salmon parr without affecting their growth or ability to transition to seawater.

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Probiotics help tilapia grow and fight disease, say scientists

Feeding Nile tilapia probiotics leads to improved health and performance, according to work analyzing research to date.

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Some functional feeds may have trade-offs for salmon health — new study

There is a complex balance between the benefits and drawbacks of functional feeds for Atlantic salmon when fish are facing concurrent health threats, a Canadian study suggests.

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Fishmeal substitute made from zooplankton could boost tilapia growth and health

A feed made from the zooplankton daphnia boosted growth rates of red tilapia fry when used as a partial replacement for fishmeal, but too much daphnia had the opposite effect.

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Yeast could aid shift away from fish-based diets in rainbow trout aquaculture

Torula yeast could be a promising option for inclusion in non-fishmeal feeds, with scientists finding links to production and immune improvements in a study using rainbow trout. 

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Data and feed helping tackle some of Europe’s prevalent fish-health threats

A Europe-wide project is helping establish new approaches to tackle economically important parasites and pathogens, both in the Mediterranean and Norway.

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Tackling jellyfish blooms affecting farmed fish in the British Isles

Tiny jellyfish have contributed to cases of gill disease in farmed Atlantic salmon in Scotland and Ireland in the past year, but early recognition and maintaining good general gill health are key to reducing the threat.

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Managing health issues in the fast-changing aquaculture industry

An interview with Stian Johnsen, project manager for the World Organization for Animal Health 

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How to balance fish welfare and environmental protection in aquaculture

Fish farmers’ efforts to protect the environment often come at a cost to fish welfare, say scientists at the University of Melbourne, in a new opinion paper.