Extremely hot years will wipe out hundreds of thousands of tonnes of fish available for catch in a country’s waters in this century, on top of projected decreases to fish stocks from long-term climate change, a new UBC study projects.
Extremely hot years will wipe out hundreds of thousands of tonnes of fish available for catch in a country’s waters in this century, on top of projected decreases to fish stocks from long-term climate change, a new UBC study projects.
Researchers from the UBC Institute for the Oceans and Fisheries (IOF) used a complex model incorporating extreme annual ocean temperatures in Exclusive Economic Zones, where the majority of global fish catches occur, into climate-related projections for fish, fisheries and their dependent human communities.
Modelling a worst-case scenario where no action is taken to mitigate greenhouse gas emissions they projected a six per cent drop in the amount of potential catches per year and 77 per cent of exploited species are projected to decrease in biomass, or the amount of fish by weight in a given area, due to extremely hot years. These decreases are on top of those projected due to long-term decadal-scale climate change.
Read more at University of British Columbia
Image: Marine heatwaves could wipe out an extra six per cent of a country’s fish catches, costing millions their jobs (Credit: Cassiano Psomas on Unsplash)
