Life history genomic regions explain differences in Atlantic salmon marine diet specialization

dc.contributor.affiliationUniversity of Helsinki - Aykanat, Tutku
dc.contributor.affiliationThe Arctic University of Norway - Rasmussen, Martin
dc.contributor.affiliationUniversity of Turku - Ozerov, Mikhail
dc.contributor.affiliationNatural Resources Institute Finland - Niemelä, Eero
dc.contributor.affiliationUniversity of Helsinki - Paulin, Lars
dc.contributor.affiliationAssociation for Water and Environment of Western Uusimaa, Lohja, Finland.** - Vaha, Juha-Pekka
dc.contributor.affiliationNorwegian Institute for Nature Research - Hindar, Kjetil
dc.contributor.affiliationNorwegian Institute of Marine Research - Wennevik, Vidar
dc.contributor.affiliationArctic Pharma (Norway) - Pedersen, Torstein
dc.contributor.affiliationNorwegian Institute for Nature Research - Svenning, Martin
dc.contributor.affiliationUniversity of Helsinki - Primmer, Craig
dc.contributor.authorAykanat, Tutku
dc.contributor.authorRasmussen, Martin
dc.contributor.authorOzerov, Mikhail
dc.contributor.authorNiemelä, Eero
dc.contributor.authorPaulin, Lars
dc.contributor.authorVaha, Juha-Pekka
dc.contributor.authorHindar, Kjetil
dc.contributor.authorWennevik, Vidar
dc.contributor.authorPedersen, Torstein
dc.contributor.authorSvenning, Martin
dc.contributor.authorPrimmer, Craig
dc.date.accessioned2025-03-24T15:18:52Z
dc.date.issued2020-09-09
dc.date.issued2020-09-09
dc.descriptionAbstract 1. Animals employ various foraging strategies along their ontogeny to acquire energy, and with varying degree of efficiencies, to support growth, maturation and subsequent reproduction events. Individuals that can efficiently acquire energy early are more likely to mature at an earlier age, as a result of faster energy gain which can fuel maturation and reproduction. 2. We aimed to test the hypothesis that heritable resource acquisition variation that co-varies with efficiency along the ontogeny would influence maturation timing of individuals. 3. To test this hypothesis, we utilized Atlantic salmon as a model which exhibit a simple, hence trackable, genetic control of maturation age. We then monitored the variation in diet acquisition (quantified as stomach fullness and composition) of individuals with different ages, and linked it with genomic regions (haploblocks) that were previously identified to be associated with age-at-maturity. 4. Consistent with the hypothesis, we demonstrated that one of the life history genomic regions tested six(6) was indeed associated with age-dependent differences in stomach fullness. Prey composition was marginally linked to six(6), and suggestively (but non-significantly) to vgll3 genomic regions. We further showed Atlantic salmon switched to the so-called "feast and famine" strategy along the ontogeny, where older age groups exhibited heavier stomach content, but that came at the expense of running on empty more often. 5. These results suggest genetic variation underlying resource utilization may explain the genetic basis of age structure in Atlantic salmon. Given that ontogenetic diet has a genetic component and the strong spatial diversity associated with these genomic regions, we predict populations with diverse maturation age will have diverse evolutionary responses to future changes in marine food-web structures. 28-Jul-2020
dc.identifierhttps://doi.org/10.5061/dryad.cz8w9gj1m
dc.identifier.urihttps://hydatakatalogi-test-24.it.helsinki.fi/handle/123456789/10233
dc.rightsOpen
dc.rights.licensecc-zero
dc.subjectdiet specialization
dc.subjectontogenetic diet shift
dc.subjectLife History Evolution
dc.subjectontogenetic foraging variation
dc.titleLife history genomic regions explain differences in Atlantic salmon marine diet specialization
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