DOI: 10.5061/dryad.17bq5d8
title: Data from: Can variation in standard metabolic rate explain context-dependent performance of farmed salmon offspring?

description: Escaped farmed Atlantic salmon interbreed with wild Atlantic salmon,
 leaving offspring that often have lower success in nature than pure wild
 salmon. On top of this, presence of farmed salmon descendants can impair
 production of wild type recruits. We hypothesize that both these effects
 connect with farmed salmon having acquired higher standard metabolic rates
 (SMR, the energetic cost of self-maintenance) during domestication.
 Furthermore, fitness related advantages of phenotypic traits associated
 with both high SMR and farmed salmon (e.g. social dominance) depend on
 environmental conditions, such as food availability. We hypothesize that
 farmed offspring have an advantage at high food availability due to e.g.
 dominance behavior but suffer increased risks of starvation when food is
 scarce because this behavior is energy-demanding. To test these
 hypotheses, we first compare embryo SMR of pure farmed, farmed-wild
 hybrids and pure wild offspring. Next, we test early life performance (in
 terms of survival and growth) of hybrids relative to that of their wild
 half-siblings, as well as their competitive abilities, in semi-natural
 conditions of high and low food availability. Finally, we test how SMR
 affects early life performance at high and low food availability. We find
 inconclusive support for the hypothesis that domestication has induced
 increased SMR. Further, wild and hybrid juveniles had similar survival and
 growth in the semi-natural streams. Yet, the presence of hybrids led to
 decreased survival of their wild half-siblings. Contrary to our hypothesis
 about context-dependency, these effects were not modified by food
 availability. However, wild juveniles with high SMR had decreased survival
 when food was scarce, but there was no such effect at high food
 availability. This study provides further proof that farmed salmon
 introgression may compromise the viability of wild salmon populations. We
 cannot, however, conclude that this is connected to alterations in the
 metabolic phenotype of farmed salmon.
description: Growth of Atlantic
 salmon juvenilesFinal mass of individual
 Atlantic salmon juveniles at experiment termination given together with
 the associated mean family egg mass and standard metabolic rate
 (residuals). Also provided is information on the types of crosses (wild
 mother x wild father: w, wild mother x farmed father: wf, farmed mother x
 wild father: fw), food availability treatment (low: L, and high: H),
 competition treatment (allopatry: w, wf, fw, and sympatry: w-fw, w-wf) and
 the final number of suriving offspring in each stream
 channel.Growth.txtOxygen consumption for the Imsa-Aquagen materialO2 consumption in each vial (mg) that contained 5 eggs is given together with mean egg size (g), duration of each measurement period (h), type of cross (wild mother x wild father: ww, farmed mother x farmed father: ff, wild mother x farmed father: wf, farmed mother x wild father: fw) and female and male type (wild: w, farmed:f) and ID.ImsaAqO2.txtOxygen consumption for the Surna-AquaGen materialO2 consumed in each vial (mg) that contained 1 eggs is given together with egg size (g), duration of each measurement period (h), type of cross (wild mother x wild father: ww, farmed mother x farmed father: ff, wild mother x farmed father: wf, farmed mother x wild father: fw) and female and male type (wild: w, farmed: f) and ID.SurnaAqO2.txtSurvival of Atlantic salmon juvenilesNumber of Atlantic salmon individuals of each family and cross (wild mother x wild father: w, wild mother x farmed father: wf, and farmed mother x farmed father: fw) that were stocked and recaptured in each stream channel. Associated family embryo SMR (residuals) and mass is given together with information on the food availability treatment (high: H, and low: L) and the competition treatment (allopatry: w, wf and fw, and sympatry: w-fw, w-wf) .Survival.txt