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\acceptedDD MMMM YYYYACKNOWLEDGEMENTS
The authors sincerely thank Neil Metcalfe for advice on the design of
the trials; Rowan Smith and Phoebe Kaiser-Wilks for assistance with
animal husbandry at the Scottish Centre for Ecology and the Natural
Environment (SCENE), University of Glasgow; Neil Evans for assistance
with sample processing; Samuel-Karl Kämmer and Maria Capstick for
laboratory assistance; Martin Kainz for hosting the lipid analyses at
WasserCluster Lunz – Biologische Station GmbH; and Garant-Tiernahrung
GmbH (Pöchlarn, Austria) for producing and donating fish feed. This work
was supported by the Fisheries Society of the British Isles [PhD
Studentship to JPK] and the Austrian Science Fund [Stand Alone
Project P35515-B to LZ].