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

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dc.contributor University of Helsinki, Evolution, Conservation, and Genomics en
dc.contributor University of Helsinki, Institute of Biotechnology en
dc.contributor University of Helsinki, Helsinki Institute of Sustainability Science (HELSUS) en Aykanat, Tutku Rasmussen, Martin Ozerov, Mikhail Niemelä, Eero Paulin, Lars Vähä, Juha-Pekka Hindar, Kjetil Wennevik, Vidar Pedersen, Torstein Svenning, Martin-A. Primmer, Craig R. 2021-10-31T23:06:03Z 2021-11-01T03:45:38Z 2020-11
dc.identifier.citation Aykanat , T , Rasmussen , M , Ozerov , M , Niemelä , E , Paulin , L , Vähä , J-P , Hindar , K , Wennevik , V , Pedersen , T , Svenning , M-A & Primmer , C R 2020 , ' Life-history genomic regions explain differences in Atlantic salmon marine diet specialization ' , Journal of Animal Ecology , vol. 89 , no. 11 , pp. 2677-2691 . en
dc.identifier.issn 0021-8790
dc.identifier.other PURE: 149393427
dc.identifier.other PURE UUID: 4e971e6b-82f4-42f4-8b41-69943414d664
dc.identifier.other WOS: 000573020500001
dc.identifier.other ORCID: /0000-0002-3687-8435/work/83843241
dc.description.abstract 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 covaries with efficiency along the ontogeny would influence maturation timing of individuals. 3. To test this hypothesis, we utilized Atlantic salmon as a model which exhibits 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 (six6) was indeed associated with age-dependent differences in stomach fullness. Prey composition was marginally linked tosix6, and suggestively (but non-significantly) tovgll3genomic 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. en
dc.format.extent 15
dc.language.iso eng
dc.relation.ispartof Journal of Animal Ecology
dc.rights en
dc.subject Atlantic salmon en
dc.subject diet specialization en
dc.subject life-history evolution en
dc.subject ontogenetic diet shift en
dc.subject ontogenetic foraging variation en
dc.subject HOMEOBOX GENE en
dc.subject POST-SMOLTS en
dc.subject SALAR L. en
dc.subject ONTOGENIC NICHE en
dc.subject GROWTH-RATE en
dc.subject FOOD-WEB en
dc.subject AGE en
dc.subject FISH en
dc.subject PREDATION en
dc.subject 1181 Ecology, evolutionary biology en
dc.title Life-history genomic regions explain differences in Atlantic salmon marine diet specialization en
dc.type Article
dc.description.version Peer reviewed
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/acceptedVersion

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