Category Archives: Aquaculture

Effects of biodensity on the growth, stress physiology, and welfare of Arctic charr in freshwater

Category : Aquaculture

Biodensity is a major factor affecting the production and welfare of farmed fishes. During a 91 day study, Artic charr were held at 5 biodensities and examined key growth, stress physiology, and welfare parameters. Growth rates were lower in charr reared at the highest biodensities while feed efficiency was negatively affected at both the highest and lowest biodensities. The results support an optimal biodensity range for charr culture between 60 and 90 kg/m3 to optimize production and welfare.

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Creating a more sustainable fish feed

Category : Aquaculture

Ryerson University researchers are using genomics to try to make fish feed more sustainable. A genetically engineered variety of camelina, an oilseed plant with naturally high omega-3 levels, is being tested to see if it could match the omega-3 levels that fish meal and fish oil provide and that aquaculture species require in their diets.

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Size does matter

Category : Aquaculture

Fish with larger brains are higher up the food chain, says new research from the University of Guelph. The researchers also discovered that fish with larger brains moved around more and ate larger prey than smaller-brained species. The ability to respond rapidly to changing food availability is integral to stabilizing food webs.

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