Tusche, K., Berends, K., Wuertz, S., Susenbeth, A. and Schulz, Carsten (2011) Evaluation of feed attractants in potato protein concentrate based diets for rainbow trout (Oncorhynchus mykiss). Aquaculture, 321 (1-2). pp. 54-60. DOI 10.1016/j.aquaculture.2011.08.020.

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Abstract

A feeding trial was carried out with rainbow trout to evaluate different feed attractants in isonitrogenous (472 +/- 8 g CP kg(-1)) and isoenergetic (21.7 +/- 0.3 MJ kg(-1)) diets upon fish meal (FM) replacement by potato protein concentrates (PPCs) at 50% and low glycoalkaloid content (7 mg kg(-1)). After one week of acclimatization, two fish meal diets - one with 7 mg kg(-1) synthetic glycoalkaloids (GFM) and one control (FM), a PPC control without additional attractants (PP), and six PPC diets with blood meal (BM 4 or 8%). mussel meal (MM 4 or 8%) and a free amino acid mixture (AM 0.5 or 1.0% alanine, glycine and betaine) as attractant were fed in triplicate until apparent satiation over a period of 56 d to the experimental groups (7 fish per tank, average initial weight 52.8 +/- 03 g). All PPC groups revealed reduced growth when compared to the fish meal group (FM). Furthermore, all PPC groups exhibited lower growth when compared to the GFM group fed at comparable glycoalkaloid concentrations suggesting antinutritional effects apart from glycoalkaloids. Nevertheless, a PER of more than 2 in all groups indicated acceptable protein utilization in PPC groups, additionally supported by FCR ranging between 0.92 and 1.15. Highest daily feed intake (DFI) was observed in the FM and GFM group, but reduced in all PPC groups. Among the attractants used, BM and AM resulted in the highest DFI. A good nutritional status did not reveal severe impact of PPC in general. (C) 2011 Elsevier B.V. All rights reserved

Academic paper (PDF): Evaluation of feed attractants in potato protein concentrate based diets for rainbow trout ( Oncorhynchus mykiss ). Available from: https://www.researchgate.net/publication/234080838_Evaluation_of_feed_attractants_in_potato_protein_concentrate_based_diets_for_rainbow_trout_Oncorhynchus_mykiss [accessed Apr 3, 2017].

Document Type:	Article
Research affiliation:	OceanRep > The Future Ocean - Cluster of Excellence > FO-R04 OceanRep > The Future Ocean - Cluster of Excellence Kiel University
Refereed:	Yes
Open Access Journal?:	No
Publisher:	Elsevier
Projects:	Future Ocean
Date Deposited:	03 Apr 2017 10:16
Last Modified:	28 Mar 2019 12:37
URI:	https://oceanrep.geomar.de/id/eprint/37376

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