4.5 Article

High-oil residue camelina meal, a viable source of protein at low levels in diets for juvenile salmonids

Journal

AQUACULTURE NUTRITION
Volume 26, Issue 2, Pages 558-567

Publisher

WILEY-HINDAWI
DOI: 10.1111/anu.13017

Keywords

Atlantic salmon; camelina; growth performance; intestinal morphology; rainbow trout; whole body composition

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Funding

  1. Nova Scotia Business Inc.
  2. Productivity and Innovation Voucher

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The oilseed Camelina sativa has been studied as a lipid source for farmed salmonids, but recommended inclusion as a protein source has not been determined. This study evaluated low inclusion of camelina high-oil residue meal (HORM) at 20, 40 and 60 g/kg of the diet, to determine an adequate level for Atlantic salmon parr (Salmo salar) and rainbow trout (Oncorhynchus mykiss). Salmon and trout were fed experimental diets containing up to 60 g/kg HORM for 16 weeks. At 40 g/kg HORM, trout and salmon growth performance were similar to those fed a control diet. However, at 60 g/kg HORM, trout showed lower final weight, weight gain and feed intake than those fed the control diet. Rainbow trout fed 40 and 60 g/kg HORM showed significantly lower whole body ash (p = .005), slightly lower whole body protein levels and higher fat than the control. In salmon fed 60 g/kg HORM diets, whole body ash (p = .024), and the submucosal layer of the intestine was thicker than the control (p = .007). Current results indicate that up to 40 g/kg HORM can be included in diets for rainbow trout and salmon juveniles.

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