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Effects of dietary protein source on growth, immune function, blood chemistry and disease resistance of Atlantic salmon (Salmo salar L.) parr


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Bransden, MP and Carter, CG and Nowak, BN (2001) Effects of dietary protein source on growth, immune function, blood chemistry and disease resistance of Atlantic salmon (Salmo salar L.) parr. Animal Science, 73. pp. 105-113. ISSN 1357-7298

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Many studies with fin fish have demonstrated the potential to use alternative dietary protein sources to fish meal
based on growth responses, although these trials mostly neglect to determine if such protein sources affect immune
function. This study investigated the effect of fish meal replacement with dehulled lupin meal (LPN) or hydrolysed
poultry feather meal (FTH). Atlantic salmon (
Salmo salar
L.) parr were supplied isonitrogenous and isoenergetic
diets with 40% of the dietary protein provided by LPN or FTH, or 400 g/kg of the dietary protein provided equally
by LPN and FTH (MIX). A diet mainly containing fish-meal protein acted as a control (CON). Growth, immune
function, blood chemistry and disease resistance were assessed after 56 days. Significant differences (
< 0.05) in
weight gain were detected between Atlantic salmon given the CON and FTH diets, whilst those salmon given LPN
and MIX did not differ from any other. Productive protein values were significantly lower (
< 0.01) for salmon on
FTH compared with those on CON and MIX. Immune function (as assessed by lysozyme, antiprotease, neutrophil
oxygen radical production and plasma total immunoglobulin) and blood chemistry (as assessed by plasma total
protein and glucose) were not significantly (
> 0.05) affected by any diet. Mortality rates of Atlantic salmon
challenged with
Vibrio anguillarum
were not influenced by diet. These data suggest Atlantic salmon could be
supplied diets with the fish meal component reduced to supply approximately 600 g/kg of the total protein, with the
remaining 400 g/kg supplied by dehulled lupin meal or a combined dehulled lupin and hydrolysed poultry feather
meal without any adverse effects on growth, immune function or blood chemistry.

Item Type: Article
Keywords: Atlantic salmon, immune response, protein intake, fish meal, plant protein
Journal or Publication Title: Animal Science
Page Range: pp. 105-113
ISSN: 1357-7298
Additional Information:

The definitive version is available at Cambridge University Press

Date Deposited: 23 Mar 2007
Last Modified: 18 Nov 2014 03:13
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