13 Works

Data from: Within-season variation in sexual selection in a fish with dynamic sex roles

Sebastian Wacker, Trond Amundsen, Elisabet Forsgren & Kenyon B. Mobley
The strength of sexual selection may vary between species, among populations, and within populations over time. While there is growing evidence that sexual selection may vary between years, less is known about variation in sexual selection within a season. Here, we investigate within-season variation in sexual selection in male two-spotted gobies (Gobiusculus flavescens). This marine fish experiences a seasonal change in the operational sex ratio from male- to female-biased, resulting in a dramatic decrease in...

Data from: Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation

Odd Terje Sandlund, Sten Karlsson, Eva B. Thorstad, Ole Kristian Berg, Matthew P. Kent, Ine C. J. Norum & Kjetil Hindar
The river-resident Salmo salar (“småblank”) has been isolated from other Atlantic salmon populations for 9,500 years in upper River Namsen, Norway. This is the only European Atlantic salmon population accomplishing its entire life cycle in a river. Hydropower development during the last six decades has introduced movement barriers and changed more than 50% of the river habitat to lentic conditions. Based on microsatellites and SNPs, genetic variation within småblank was only about 50% of that...

Data from: Estimating phenotypic selection in age-structured populations by removing transient fluctuations

Thomas Kvalnes, Bernt-Erik Sæther, Steinar Engen & Bernt-Erik Saether
An extension of the selection differential in the Robertson–Price equation for the mean phenotype in an age-structured population is provided. Temporal changes in the mean phenotype caused by transient fluctuations in the age-distribution and variation in mean phenotype among age classes, which can mistakenly be interpreted as selection, will disappear if reproductive value weighting is applied. Changes in any weighted mean phenotype in an age-structured population may be decomposed into between- and within-age class components....

Data from: Genetic constraints predict evolutionary divergence in Dalechampia blossoms

Geir H. Bolstad, Thomas F. Hansen, Christophe Pélabon, Mohsen Falahati-Anbaran, Rocío Pérez-Barrales & W. Scott Armbruster
If genetic constraints are important, then rates and direction of evolution should be related to trait evolvability. Here we use recently developed measures of evolvability to test the genetic constraint hypothesis with quantitative genetic data on floral morphology from the Neotropical vine Dalechampia scandens (Euphorbiaceae). These measures were compared against rates of evolution and patterns of divergence among 24 populations in two species in the D. scandens species complex. We found clear evidence for genetic...

Data from: Evolution of niche preference in Sphagnum peat mosses

Matthew G. Johnson, Gustaf Granath, Teemu Tahvanainen, Remy Pouliot, Hans K. Stenøien, Line Rochefort, Håkan Rydin & A. Jonathan Shaw
Peat mosses (Sphagnum) are ecosystem engineers— species in boreal peatlands simultaneously create and inhabit narrow habitat preferences along two microhabitat gradients: an ionic gradient and a hydrological hummock-hollow gradient. In this paper we demonstrate the connections between microhabitat preference and phylogeny in Sphagnum. Using a dataset of 39 species of Sphagnum, with an 18-locus DNA alignment and an ecological dataset encompassing three large published studies, we tested for phylogenetic signal and within-genus changes in evolutionary...

Data from: Interspecific analysis of vehicle avoidance behavior in birds

Arild Husby & Magne Husby
Among the most widespread forms of anthropogenic modification of the natural landscape is road construction, with vehicle mortality a major issue affecting amphibians, reptiles, mammals, and birds. Why some species are more susceptible to vehicle collision than others, however, is poorly understood. We examine how roadside vegetation patterns, road size, vehicle speed, and brain size influence vehicle avoidance behavior using more than 3700 individuals of 11 species of European birds. We find that on larger...

Data from: Population properties affect inbreeding avoidance in moose

Ivar Herfindal, Hallvard Haanes, Knut H. Røed, Erling J. Solberg, Stine S. Markussen, Morten Heim, Bernt-Erik Sæther & B.-E. Saether
Mechanisms reducing inbreeding are thought to have evolved owing to fitness costs of breeding with close relatives. In small and isolated populations, or populations with skewed age- or sex distributions, mate choice becomes limited, and inbreeding avoidance mechanisms ineffective. We used a unique individual-based dataset on moose from a small island in Norway to assess whether inbreeding avoidance was related to population structure and size, expecting inbreeding avoidance to be greater in years with larger...

Data from: Climatic conditions cause complex patterns of covariation between demographic traits in a long-lived raptor

Ivar Herfindal, Martijn Van De Pol, Jan T. Nielsen, Bernt-Erik Sæther, Anders P. Møller & Bernt-Erik Saether
1. Environmental variation can induce life-history changes that can last over a large part of the lifetime of an organism. If multiple demographic traits are affected, expected changes in climate may influence environmental covariances among traits in a complex manner. Thus, examining the consequences of environmental fluctuations requires that individual information at multiple life stages is available, which is particularly challenging in long-lived species. 2. Here, we analyse how variation in climatic conditions occurring in...

Data from: Farmers without borders - genetic structuring in century old barley (Hordeum vulgare)

Jenny Hagenblad, Nils E. G. Forsberg, Joanne Russell, Malcolm Macaulay & Matti W. Leino
The geographic distribution of genetic diversity can reveal the evolutionary history of a species. For crop plants, phylogeographic patterns also indicate how seed has been exchanged and spread in agrarian communities. Such patterns are, however, easily blurred by the intense seed trade, plant improvement and even genebank conservation during the twentieth century, and discerning fine-scale phylogeographic patterns is thus particularly challenging. Using historical crop specimens, these problems are circumvented and we show here how high-throughput...

Data from: Assessing risks of invasion through gamete performance: farm Atlantic salmon sperm and eggs show equivalence in function, fertility, compatibility and competitiveness to wild Atlantic salmon

Sarah E. Yeates, Sigurd Einum, William V. Holt, Ian A. Fleming & Matthew J. G. Gage
Adaptations at the gamete level (a) evolve quickly, (b) appear sensitive to inbreeding and outbreeding and (c) have important influences on potential to reproduce. We apply this understanding to problems posed by escaped farm salmon and measure their potential to reproduce in the wild. Farm Atlantic salmon (Salmo salar) are a threat to biodiversity, because they escape in large numbers and can introgress, dilute or disrupt locally adapted wild gene pools. Experiments at the whole...

Data from: Estimation of linkage disequilibrium and interspecific gene flow in Ficedula flycatchers by a newly developed 50k SNP array

Takeshi Kawakami, Niclas Backstrom, Reto Burri, Arild Husby, Pall Olason, Amber Rice, Murielle Alund, Anna Qvarnstrom, Hans Ellegren & Amber M. Rice
With the access to draft genome sequence assemblies and whole-genome re-sequencing data from population samples, molecular ecology studies will be able to take truly genome-wide approaches. This now applies to an avian model system in ecological and evolutionary research: Old World flycatchers of the genus Ficedula, for which we recently obtained a 1.1 Gb collared flycatcher genome assembly and identified 13 million SNPs in population re-sequencing of this species and its sister species, pied flycatcher....

Data from: Walk the line: 600,000 years of molar evolution constrained by allometry in the fossil rodent Mimomys savini

Cyril Firmat, Iván Lozano-Fernández, Jordi Agustí, Geir H. Bolstad, Gloria Cuenca-Bescós, Thomas F. Hansen & Christophe Pélabon
The allometric-constraint hypothesis states that evolutionary divergence of morphological traits is restricted by integrated growth regulation. In this study, we test this hypothesis on a time-calibrated and well-documented palaeontological sequence of dental measurements on the Pleistocene arvicoline rodent species Mimomys savini from the Iberian Peninsula. Based on 507 specimens representing nine populations regularly spaced over 600 000 years, we compare static (within-population) and evolutionary (among-population) allometric slopes between the width and the length of the...

Data from: Effects of population characteristics and structure on estimates of effective population size in a house sparrow metapopulation

Helle Tessand Baalsrud, Bernt-Erik Sæther, Ingerid Julie Hagen, Ane Marlene Myhre, Thor Harald Ringsby, Henrik Pärn, Henrik Jensen & Bernt-Erik Saether
Effective population size (Ne) is a key parameter to understand evolutionary processes and the viability of endangered populations as it determines the rate of genetic drift and inbreeding. Low Ne can lead to inbreeding depression and reduced population adaptability. In this study we estimated contemporary Ne using genetic estimators (LDNE, ONeSAMP, MLNE and CoNe) as well as a demographic estimator in a natural insular house sparrow metapopulation. We investigated whether population characteristics (population size, sex...

Registration Year

  • 2014

Resource Types

  • Dataset


  • Norwegian University of Science and Technology
  • Norwegian Institute for Nature Research
  • University of Oslo
  • Uppsala University
  • Norwegian University of Life Sciences
  • University of Eastern Finland
  • Rovira i Virgili University
  • Duke University
  • University of Zaragoza
  • Australian National University