Plasticity in response to feed availability - does feeding regime influence the relative growth performance of domesticated, wild and hybrid Atlantic salmon Salmo salar parr?

Harvey, A. C., Solberg, M. F., Glover, K. A., Taylor, M. I. ORCID: https://orcid.org/0000-0002-3858-0712, Creer, S. and Carvalho, G. R. (2016) Plasticity in response to feed availability - does feeding regime influence the relative growth performance of domesticated, wild and hybrid Atlantic salmon Salmo salar parr? Journal of Fish Biology, 89 (3). 1754–1768. ISSN 0022-1112

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Abstract

Growth of farmed, wild and F1 hybrid Atlantic salmon parr, Salmo salar, was investigated under three contrasting feeding regimes in order to understand how varying levels of food availability affects relative growth. Treatments consisted of standard hatchery feeding (ad libitum), access to feed for 4h every day, and access to feed for 24h on three alternate days weekly. Mortality was low in all treatments, and food availability had no effect on survival of all groups. The offspring of farmed S. salar significantly outgrew the wild S. salar, while hybrids displayed intermediate growth. Furthermore, the relative growth differences between the farmed and wild S. salar did not change across feeding treatments, indicating a similar plasticity in response to feed availability. Although undertaken in a hatchery setting, these results suggest that food availability may not be the sole driver behind the observed reduced growth differences found between farmed and wild fishes under natural conditions.

Item Type:	Article
Uncontrolled Keywords:	escapees,farmed,food availability,genetic interaction,hybridisation,reaction norms
Faculty \ School:	Faculty of Science > School of Biological Sciences
UEA Research Groups:	Faculty of Science > Research Groups > Organisms and the Environment Faculty of Science > Research Centres > Centre for Ecology, Evolution and Conservation
Depositing User:	Pure Connector
Date Deposited:	24 Sep 2016 00:20
Last Modified:	11 Nov 2024 00:43
URI:	https://ueaeprints.uea.ac.uk/id/eprint/59995
DOI:	10.1111/jfb.13076

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