MARINE OILS AND PROTEINS
Fish protein hydrolysate as a sustainable protein alternative in Atlantic salmon diets Jason Whooley, Snehal Gite, Bio-marine Ingredients Ireland
A fish feed trial has been conducted to assess the impact of feeding an 80% plant protein diet with and without fish protein hydrolysate (FPH) supplementation. The trial examined the impact on the growth and gut health of Atlantic salmon. The study was conducted collaboratively at Teagasc Food Research Centre Moorepark, Marine Institute Ireland, NUI Galway, Bio-marine Ingredients Ireland Ltd. (BII) and published in the journal Scientific Reports (Egerton et al., 2020). This study was an attempt to re-formulate aquafeeds with novel and sustainable fish protein hydrolysates which can complement plant proteins in aquafeed to enhance the quality and meet the requirements for optimum growth and wellbeing of Atlantic salmon without impacting cost. Bio-marine Ingredients Ireland, owners of a marine bio-refinery in Ireland, produced fish protein hydrolysates both soluble (SPH) and partially soluble (PHP). These hydrolysates were used as a protein ingredient to replace 10% of plant protein in a fishmeal diet. Commercially available feed ingredients were used and diets were formulated to meet the dietary requirements of appropriately sized salmon. Variable components of aquafeed formulation of experimental diets and associated experimental findings are summarized in Table 1. All diets were iso-nitrogenous and iso-lipidic in content.
Study design The 12-week feeding trial was carried out at Salmon Springs Ltd. freshwater juvenile salmon rearing facility in Co. Galway, Ireland. Atlantic salmon (Salmo salar) were raised from eggs on site. Before the experiment, fish
Aquafeed: Advances in Processing & Formulation Vol 12 Issue 3 2020