6 Works

Data from: Heterozygosity-fitness correlations in a migratory bird: an analysis of inbreeding and single-locus effects

Xavier A. Harrison, Stuart Bearhop, Richard Inger, Kendrew Colhoun, Gudmundur A. Gudmundsson, David Hodgson, Graham McElwaine & Tom Tregenza
Studies in a multitude of taxa have described a correlation between heterozygosity and fitness, and usually conclude that this is evidence for inbreeding depression. Here we have used multi-locus heterozygosity estimates from 15 microsatellite markers to show evidence of heterozygosity-fitness correlations (HFCs) in a long-distance migratory bird, the light-bellied Brent goose. We found significant, positive heterozygosity-heterozygosity correlations between random subsets of the markers we employ, and no evidence that a model containing all loci as...

Data from: Looking into the past – the reaction of three grouse species to climate change over the last million years using whole genome sequences

Radoslav Kozma, Páll Melsted, Kristinn P. Magnússon & Jacob Höglund
Tracking past population fluctuations can give insight into current levels of genetic variation present within species. Analysing population dynamics over larger time scales can be aligned to known climatic changes to determine the response of species to varying environments. Here, we applied the Pairwise Sequentially Markovian Coalescent (PSMC) model to infer past population dynamics of three widespread grouse species; black grouse, willow grouse and rock ptarmigan. This allowed the tracking of the effective population size...

Data from: Climatic conditions produce contrasting influences on demographic traits in a long distance Arctic migrant

Ian R. Cleasby, Thomas W. Bodey, Freydis Vigfusdottir, Jenni L. McDonald, Graham McElwaine, Kerry Mackie, Kendrew Colhoun & Stuart Bearhop
The manner in which patterns of variation and interactions among demographic rates contribute to population growth rate (λ) is key to understanding how animal populations will respond to changing climatic conditions. Migratory species are likely to be particularly sensitive to climatic conditions as they experience a range of different environments throughout their annual cycle. However, few studies have provided fully integrated demographic analyses of migratory populations in response to changing climatic conditions. Here, we employed...

Data from: Primers to highly conserved elements optimized for qPCR-based telomere length measurements in vertebrates

Stephanie Hudon, Esteban Palencia Hurtado, James Beck, Steven Burden, Devin Bendixsen, Kathleen Callery, Jennifer Sorensen Forbey, Lisette Waits, Robert Miller, Ólafur Nielsen, Julie Heath & Eric Hayden
Telomere length dynamics are an established biomarker of health and aging in animals. The study of telomeres in numerous species has been facilitated by methods to measure telomere length by real-time quantitative PCR (qPCR). In this method, telomere length is determined by quantifying the amount of telomeric DNA repeats in a sample and normalizing this to the total amount of genomic DNA. This normalization requires the development of genomic reference primers suitable for qPCR, which...

Data from: Alien eggs in duck nests: brood parasitism or a help from Grandma?

Ralph Tiedemann, Kirsten B Paulus, Katja Havenstein, Sverrir Thorstensen, Aevar Petersen, Peter Lyngs & Michel C Milinkovitch
Intraspecific brood parasitism (IBP) is a remarkable phenomenon by which parasitic females can increase their reproductive output by laying eggs in conspecific females' nests in addition to incubating eggs in their own nest. Kin selection could explain the tolerance, or even the selective advantage, of IBP, but different models of IBP based on game theory yield contradicting predictions. Our analyses of 7 polymorphic autosomal microsatellites in two eider duck colonies indicate that relatedness between host...

Data from: Host sex and age typically explain variation in parasitism of Rock Ptarmigan: implications for identifying determinants of exposure and susceptibility

Ólafur Nielsen, André Morrill, Karl Skírnisson, Ute Stenkewitz, Guðný Pálsdóttir & Mark Forbes
Measures of parasitism often differ between hosts. This variation is thought due in part to age or sex differences in exposure to parasites and/or susceptibility to parasitism. We assessed how often age or sex biases in parasitism were found using a large, multi-year (2006 – 2017) dataset of 12 parasite species of Icelandic Rock Ptarmigan (Lagopus muta). We found host traits (i.e. age and/or sex) accounted for significant variation in abundance of 11 of the...

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Affiliations

  • Icelandic Institute of Natural History
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  • University of Iceland
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  • University of Exeter
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  • University of Geneva
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  • Boise State University
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  • University of Potsdam
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  • Wildfowl & Wetlands Trust
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