Digestibility, growth and nutrient retention in rainbow trout (Oncorhynchus mykiss) fed diets extruded at two different temperatures

Published 2005

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Publication details

Journal : Aquaculture Nutrition , vol. 11 , p. 251–256–6 , 2005

Publisher : Blackwell Publishing

International Standard Numbers :
Printed : 1353-5773
Electronic : 1365-2095

Publication type : Academic article

Contributors : Sørensen, Mette; Storebakken, Trond; Shearer, Karl Douglas

Issue : 4

Links :
DOI : doi.org/10.1111/j.1365-2095.20...

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Kjetil Aune
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Summary

Digestibility and utilization of a fishmeal-based diet extruded at 103 or 137 °C were examined. Each of the diets was fed to 0.5-kg rainbow trout in nine tanks supplied with freshwater. Specific growth rate was significantly (P < 0.05) elevated for trout fed the feed extruded at 137 °C. The apparent digestibilities of protein and energy, feed conversion ratio, retentions of nitrogen and energy were not significantly affected by extrusion temperature. Digestibility of ash was significantly reduced in the diets produced at 137 °C.