Open AccessDigestibility of microbial and mussel meal for Arctic charr ( Salvelinus alpinus ) and Eurasian perch ( Perca fluviatilis )
Author(s) -
Langeland M.,
Vidakovic A.,
Vielma J.,
Lindberg J.E.,
Kiessling A.,
Lundh T.
Publication year - 2016
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1111/anu.12268
Subject(s) - biology , perch , arctic , mussel , blue mussel , salvelinus , fish meal , saccharomyces cerevisiae , zoology , yeast , mytilus , food science , fishery , ecology , biochemistry , fish <actinopterygii> , trout
Apparent digestibility coefficients ( ADC s) for four protein‐rich alternative feed ingredients, intact baker's yeast ( Saccharomyces cerevisiae) , extracted baker's yeast ( S. cerevisiae) , zygomycetes ( Rhizopus oryzae ) and blue mussel ( Mytilus edulis ), were determined for Arctic charr ( Salvelinus alpinus ) and Eurasian perch ( Perca fluviatilis ). Diets contained 30% of test ingredients, and ADC s were compared to a reference diet containing fish meal. For Arctic charr, ADC s for dry matter ( DM , 71–99%), sum of amino acids ( SAA , 84–99%) and gross energy (70–99%) were significantly lower for intact S. cerevisiae than for extracted S. cerevisiae, R. oryzae and M. edulis . The ADC s for the indispensable amino acids ( IAA ) in Arctic charr varied between 84% and 99%. Significant differences were found in ADC s for IAA between the test ingredients for Arctic charr, with higher values for extracted S. cerevisiae and M. edulis . The ADC s in Eurasian perch varied between 83% and 95% for DM , 89% and 98% for CP , 92% and 100% for SAA , 81% and 96% for gross energy. No significant differences were found for ADC s between the test ingredients in Eurasian perch, indicating a species effect on digestibility. Furthermore, the absence of intact cell walls had a positive effect on digestibility of S. cerevisiae for Arctic charr.