Cristin-prosjekt-ID: 289637
Sist endret: 3. januar 2014 11:52
Cristin-prosjekt-ID: 289637
Sist endret: 3. januar 2014 11:52
Prosjekt

Stickleback morph variation in populations: A study with genomic and ecological perspectives

prosjektleder

Asbjørn Vøllestad
ved Centre for Ecological and Evolutionary Synthesis ved Universitetet i Oslo

prosjekteier / koordinerende forskningsansvarlig enhet

  • Centre for Ecological and Evolutionary Synthesis ved Universitetet i Oslo

Tidsramme

Avsluttet
Start: 1. oktober 2008 Slutt: 1. oktober 2012

Beskrivelse Beskrivelse

Tittel

Stickleback morph variation in populations: A study with genomic and ecological perspectives

Vitenskapelig sammendrag

The threespined stickleback (Gasterosteus aculeatus) has a long history as a vertebrate model organism. Being a fish that exhibit large morphological variation, it is well suited for studying evolutionary processes. In particular, the number and size of the lateral plates vary strongly among environments (many plates in marine environments, few or missing in fresh water). A reduction or loss of pelvic spines is also known from freshwater systems, but never in the sea. Both traits are believed to protect against predation. Different phenotypes can coexist in the same environment. In this project we will study how the different phenotypes are sustained in nature. We will study the level of reproductive isolation and types of reproductive barriers between phenotypic morphs, using mate choice and common garden experiments. Female mate choice will be tested based on a number of sensory cues, also including smell (maybe influenced by MHC-genes). The MHC-genes play an important role in the immune system, where the number and diversity of the alleles clearly plays an important role in parasitic resistance. Using microsatellites, QTL markers and morphological measurements, we will investigate the genotype-phenotype relationships for a number of populations. Finally, a study the ontogenetic development of the lateral plates and the pelvic spines will be conducted. This may give information of how the anti-predator traits develop trough life for the various morphs and may shed more light upon the rapid evolution of these phenotypic features after colonizing freshwater. We believe that this project will bring new and important information about adaptive speciation, an important process in evolutionary biology.

prosjektdeltakere

prosjektleder
Aktiv cristin-person

Asbjørn Vøllestad

  • Tilknyttet:
    Prosjektleder
    ved Centre for Ecological and Evolutionary Synthesis ved Universitetet i Oslo
Aktiv cristin-person

Helene Marie Lampe

  • Tilknyttet:
    Prosjektdeltaker
Aktiv cristin-person

Kjetill Sigurd Jakobsen

  • Tilknyttet:
    Prosjektdeltaker
Aktiv cristin-person

Kjartan Østbye

  • Tilknyttet:
    Prosjektdeltaker
Aktiv cristin-person

Unni Grimholt

  • Tilknyttet:
    Prosjektdeltaker
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