Aquafeeds
Reduced performance in fish fed high-soy feeds has been blamed on antinutrients, low methionine content and palatability issues. Pretreatment to inactivate anti-nutritional compounds and supplementation with amino acids improves soy-based feed performance, but not to control levels.
Health & Welfare
A growth trial in Canada evaluated the use of algae biomass to increase the concentration of long-chain polyunsaturated fatty acids in the tissues of rainbow trout.
Health & Welfare
Circular tank-based recirculating aquaculture systems can be used to effectively culture rainbow trout and other salmonids in a bio-secure and environmentally friendly manner that imposes a much lower water and wastewater footprint than traditional flow-through culture technologies.
Health & Welfare
Working on a system for oral delivery of IHNV vaccine via fish feed, researchers' goal is to adapt a proven oral DNA-based vaccine given to salmon in Canada to rainbow trout through encapsulation with a polymer or liposome.
Health & Welfare
To alleviate problems associated with conducting research on fish of unknown and likely diverse genetic backgrounds, a collaborative project has been established to produce a stock of rainbow trout with a defined genetic background for use in fish nutrition research.
Aquafeeds
In a study, ground barley containing different levels of beta-glucan was substituted for wheat in experimental diets fed to rainbow trout.
Health & Welfare
The culture of sterile triploid rainbow trout, which carry three sets of chromosomes, can limit losses to sexual maturation and reduce potential problems regarding interactions of escaped fish with natural stocks. The authors’ research holds promise for creating tetraploid rainbow trout strains that can be crossed with diploid trout to yield triploids for aquaculture production.
Health & Welfare
Research at the Conservation Fund’s Freshwater Institute is evaluating a prototype percussive stunning system for slaughtering food-size rainbow trout.
Responsibility
Proposed best management practices for rainbow trout production address eight areas of production covering the entire culture cycle.
Aquafeeds
Methionine hydroxy analog (MHA) supplementation and the addition of other amino acids in soybean-based trout diets can improve their nutritional values.
Aquafeeds
Evaluating trout performance fed diets with supplemental lysine in plant protein meal, and total ammonia nitrogen and soluble phosphorus excretion.
Aquafeeds
Feed is the source of enriching nutrients in rainbow trout farming, and most efforts to lower pollution from trout farms involve modifications of feeds.