Grayling migration in large Norwegian rivers

Shorebird fieldwork Alaska

Past and present fieldwork  

  • 2014 Grayling migration ecology in large Norwegian rivers
    • with Prof. A. Vøllestad (UiO, Oslo, Norway) & Dr. J. Museth (NINA, Lillehammer, Norway).
    • We set up a large scale field experiment to determine to what extent small European grayling (Thymallus thymallus) larvae (< 20 mm) may drift downstream due to high discharges in large river systems. Voluntary or involuntary downstream drift may be an important driving factor for adult upstream  spawning migration. 
  • 2013 Seed dispersal by Song Thrushes (Turdus philomelos), Balearctic Islands, Spain
    • with Dr. L. Santamaría (IMEDEA, Spain).
    • We monitored seed removal by Thrushes over time, to make a spatially explicit model of seed predation and subsequent endozoochorous seed dispersal in a remote small island system.   
  • 2011 Shorebird migration ecology, Australia
    • with Prof. M. Klaassen (Deakin University, Australia).
    • We captured, measured and banded migratory shorebirds to retrieve geolocators containing information on migration. 
  • 2009 Population genetics of aquatic snails, Parque Nacional de Doñana, Spain
    • with Dr. J. Figuerola (Doñana Biological Station, Spain).
    • We sampled the invasive aquatic snail Physa acute throughout and around Doñana National Park, in order to perform population genetic analyses that informed on the potential dispersal vectors used by this invasive species.   
  • 2008 Breeding ecology Brentgeese (Branta bernicla), Taimyr, Siberia
    • with Yu. L. Mazurov (Heritage institute, Russia), Dr. B.S. Ebbinge (Alterra, The Netherlands), Dr. B.A. Nolet (NIOO, The Netherlands).
    • Within a long term monitoring framework we investigated the breeding succes and choices of Arctic breeding Brentgeese (Branta bernicla) in relation to lemming cycles and the presence of gulls and snowy owls on the breeding sites.
  • 2006 Shorebird breeding ecology, Yukon-Kuskokwim Delta, Alaska, US
    • with Dr. S.E. Jamieson (Simon Fraser University, Canada), B. McCaffery (U.S. Fish & Wildlife Service, US).
    • By catching, color banding and following individual Dunlin (Calidris alpina pacifica) we could determine how individuals make decisions on mate choice and choice of nesting sites when arriving to Arctic breeding grounds after their long-distance migration. 

Seed dispersal by Song Thrushes

Fieldwork Doñana National Park, Spain