Líffræðifélag Íslands - biologia.is
Líffræðiráðstefnan 2023
Höfundar / Authors: Jacob M. Kasper (1), Maartje Oostdijk (2), Gunnar Stefánsson (2), Pamela Woods (3), Erla Sturludóttir (1)
Starfsvettvangur / Affiliations: 1. Landbúnaðarháskóli Íslands, 2. Hafrannsóknastofnun, 3. Háskóli Íslands
Kynnir / Presenter: Jacob Kasper
Ecosystem models can be used to study the impact of a variety of perturbations. Here we simulated the impacts of changes in fleet composition on the ecosystem and harvest from multispecies fisheries in Iceland. Building on a previously published Atlantis model of the Iceland marine ecosystem that simulated the years 1948-2012, we updated the model to simulate 1948-2020. We developed dynamic fisheries models for the bottom trawl and longline fishing fleets in Iceland started in 2000 by forcing fishing effort. These fleets harvest the majority of Atlantic Cod (Gadus morhua), Haddock (Melanogrammus aeglefinus), and Saithe (Pollachius virens): socially and economically important species which account for more than 60% of the total harvest value in Iceland. As fishing effort responds to changes in technology, ecology, markets, and regulations, future changes in fleet composition are expected. To model the impact of these changes on the ecosystem we compared the outcomes of status quo effort to a series of effort changes in the bottom trawl and longline fishing for the next ten years.