Ballan wrasse are picky eaters when young. As adults, they eat sea lice off the skin of salmon which makes them valuable to fish farmers. But as juveniles, wrasse want to be served shrimp, states research from The Research Council of Norway.
This article by Luca Tacchi, University of Aberdeen et al looks at the transcriptomic and physiological responses to fishmeal substitution with plant proteins in formulated feed in farmed Atlantic salmon (Salmo salar).
Researchers based in Norway have successfully fractionated wheat distillers dried grains and solubles (WDDGS) to improve its nutritional value for rainbow trout.
It is widely understood that each fish species has an optimum temperature range and will lose appetite and grow more slowly when water temperatures go much above that range. Until recently the physical effects on the fish leading to these symptoms were not ful…
