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Main Title: Pike-Perch (Sander lucioperca) and Rainbow Trout (Oncorhynchus mykiss) Fed with an Alternative Microorganism Mix for Reducing Fish Meal and Oil—Fishes’ Growth Performances and Quality Traits
Author(s): Schafberg, Michaela
Loest, Karin
Müller-Belecke, Andreas
Rohn, Sascha
Type: Article
Language Code: en
Abstract: In the last decades, several plant-based materials were used for the substitution of fish meal and oil in aquaculture. The present study evaluated the fish quality and the sensory differences of rainbow trout (Oncorhynchus mykiss) and pike-perch (Sander lucioperca) from three different feeding groups, which were fed a commercially available industrial (standard) diet, a control diet, and a special microorganism-based feed mix. This feed mainly consisted of a mix made of Rhodotorula glutinis, Crypthecodinium cohnii, and Arthrospira sp. and had 50% less fish meal and fish oil compared to typical control diets. At the beginning, the pike-perch population was six months old, and the rainbow trout population was 15 months old. The feeding study duration was 16 weeks and every four weeks the growth performance and several morphometric parameters were recorded. Afterwards, sensory evaluation took place to identify possible trends. Sensory evaluation revealed that the rainbow trout groups did not show any significant differences to the standard and control fish fillets with regard to odor, texture, and taste. The effects on rainbow trout growth performances and carcass parameters were similar to the standard group. The feed mix was not optimal for pike-perch farming, which was also reflected by significantly adversely affected growth performance and carcass parameters. The sensorial evaluation showed an opposite trend: here, only small differences in the fillets from the feed mix and standard/control diet were observed.
Issue Date: 4-Aug-2021
Date Available: 14-Sep-2021
DDC Class: 630 Landwirtschaft und verwandte Bereiche
Subject(s): fish meal substitution
rainbow trout
Crypthecodinium cohnii
Rhodotorula glutinis
sensory impression
Sponsor/Funder: BMEL, 2817303010, Verbundprojekt: FENA - Fischmehl- und -öl Ersatzstoffe für eine nachhaltige Aquakultur - Teilprojekt 5
Journal Title: Foods
Publisher: MDPI
Publisher Place: Basel
Volume: 10
Issue: 8
Article Number: 1799
Publisher DOI: 10.3390/foods10081799
EISSN: 2304-8158
Appears in Collections:FG Lebensmittelchemie und Analytik » Publications

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