Project Number: 2050-21310-004-00-D
Project Type: Appropriated
Start Date: Dec 28, 2009
End Date: Dec 27, 2014
The objective of this research is to improve the sustainability and production efficiency of rainbow trout by developing innovative feeds that reduce dependence on marine fishery resources. Objective 1: Identify and develop grain lines with desirable traits for either direct or indirect use in aquafeeds. Objective 2: Develop mechanical, chemical and biological methods to improve the nutritional and anti-nutritional profile of grains, by-products and other alternative ingredients. Objective 3: Determine nutritional value of alternative ingredients (protein, lipid, energy) and develop practical feed formulations for improved strains of fish. 3.1: Investigate differences in feed efficiency, and protein and amino acid retention by trout of different size classes and strains. Objective 4: Determine optimal nutrient supplementation levels for specific life stages of improved strains of trout. Objective 5: Use gene expression analyses to advance the understanding of gene targets for improving nutrition, growth, and development processes under production conditions. Objective 6: Identify phenotypic differences in rainbow trout for growth and utilization of plant-based sustainable diets and determine the genetic variation for the identified traits.
A multidisciplinary approach will used combining expertise in the fields of plant genetics, grain processing, fish nutrition and physiology, and fish genetics. Grain lines will be identified that have traits desirable for fish feeds. Phenotypic differences in trout for their ability to utilize plant-based feeds will also be identified. Grains will be further modified through physical, biological or chemical methods to improve their nutritional profile for trout. Feeds will be formulated using alternative ingredients to fish meal and to meet the nutritional requirements for improved strains of trout. This project will benefit fish farmers through improved feeds and environmental compliance through reduced nutrient release, identified traits and markers to aid stock improvement efforts, feed manufacturers with alternate ingredients, reduced costs, price stability, and improved diet formulations, and grain farmers with new markets and products, and the consumer with a safe, sustainable, nutritious food supply and cleaner environment.