Blue Mussel Protein Concentrate Versus Prime Fish Meal Protein as a Dietary Attractant for Turbot (Psetta maxima L.) Given Rapeseed Proteinbased Diets.

Nagel, F., Appel, T., Rohde, C., Kroeckel, S. and Schulz, Carsten (2017) Blue Mussel Protein Concentrate Versus Prime Fish Meal Protein as a Dietary Attractant for Turbot (Psetta maxima L.) Given Rapeseed Proteinbased Diets. Journal of Aquaculture Research & Development, s2 . DOI 10.4172/2155-9546.S2-012.

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Supplementary data:

Abstract

A feeding experiment was conducted to test the attractant potential of a processed protein concentrate of the blue mussel (BMPC) as replacer for fish meal (FM) protein in rapeseed protein concentrate (RPC)-based diets for turbot. Triplicate fish groups received isonitrogenous and isoenergetic diets with a 50% or 75% replacement of FM protein by a RPC (RPC 50, RPC 75), and further FM protein substitution with 0, 2, 4 or 8% of BMPC. The application of RPC 50/0 provided no significant impact on fish performance compared to FM-reference diet, while daily feed intake (DFI), specific growth rate (SGR) and feed conversion were significantly impaired when fish fed with RPC 75/0 (P<0.05). Incorporation of BMPC failed to significantly improve DFI, SGR and FCR in RPC 50 and RPC 75 treatments (P>0.05). Protein efficiency ratio and protein productive values remained unaffected among all treatments (P>0.05). Excepting crude ash content, no changes in crude protein, crude lipid, dry matter and energy content were obtained. Hepatosomatic index tended to increased (P>0.05) in accordance with slightly hypertrophic hepatocytes of fish fed diets with a BMPC incorporation of 40-80 g kg-1. Neither inflammatory nor degenerative alterations were detected in the intestine. In summary, we demonstrated that BMPC failed to stimulate the feed intake of turbot when dietary FM protein was substituted consecutively, but it was found to maintain performance level of turbot within the test diet groups. This indicates nutritional properties of BMPC comparable to prime FM protein, functional to further reduce the FM protein content in aquafeeds for carnivorous fish.

Document Type: Article
Keywords: Stimulant; Palatability; Feed intake; Specific growth rate; Nutrient utilization; Mytilus edulis
Research affiliation: Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.4172/2155-9546.S2-012
ISSN: 2155-9546
Projects: Future Ocean
Date Deposited: 02 Feb 2018 12:46
Last Modified: 09 May 2019 09:11
URI: http://oceanrep.geomar.de/id/eprint/41816

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