Líffræðifélag Íslands - biologia.is
Líffræðiráðstefnan 2021
Erindi/veggspjald / Talk/poster V24
Höfundar / Authors: Michelle Valliant (1), Guðbjörg Ásta Ólafsdóttir (1)
Starfsvettvangur / Affiliations: 1. Rannsóknasetur Háskóla Íslands á Vestfjörðum (Research Centre of the University of Iceland in the Westfjords)
Kynnir / Presenter: Michelle Valliant
As anthropogenic impact continues on the aquatic world, fish movement is sensitive to environmental changes, which in turn can alter consumer nutrient and energy distribution within food webs. The presented study is in its early stages to examine inter- and intraspecific variation in movement, behaviour, and temperature preferences of commercially important gadoid ((Atlantic cod (Gadus morhua), saithe (Pollachius virens)), and anadromous salmonid species (Arctic char (Salvelinus alpinus) and brown trout (Salmo trutta)). The overarching aim is to understand how environmental stressors influence fish distribution in near-shore waters, early life habitat transitions, migration, and ecological niche. Here I present preliminary results on how temperature shapes the distribution and behavior of these fish species. Acoustic telemetry data was collected in 2020-2021 on the distribution of all species in space and time with temperature and depth and laboratory tests examined the behavior of cod and saithe across temperature. To meet the project aims the project is proposed to continue for the next years.