Saving Seafood

Marine heatwaves could have severe negative impacts on global fish stocks

October 4, 2021 — 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  where no action is taken to mitigate greenhouse gas emissions they projected a six percent drop in the amount of potential catches per year and 77 percent 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 the full story from the University of British Columbia at Phys.org

 

‘Sticky questions’ raised by study on coral reefs

August 12, 2021 — A new UBC study on the impact of climate change on coral reefs is raising sticky questions about conservation.

It found coral in more polluted and high traffic water handled extreme heat events better than a more remote, untouched reef.

The new study, conducted with researchers from the Republic of Kiribati’s Ministry of Fisheries and Marine Resource Development, focused on two atolls in the Central Pacific, located 59 kilometers apart.

“Because of El Niño-Southern Oscillation, which causes ocean temperatures to fluctuate along the equator from year-to-year, these  experience heat stress more often than reefs in other parts of the world,” says the study’s lead author Sara Cannon, a Ph.D. student at UBC’s Institute for the Oceans and Fisheries and the department of geography.

Read the full story at PHYS.org

Study: Technological creep doubles commercial fishing capacity every 35 years, pressuring stocks

November 25, 2019 — A recent study undertaken by researchers from the University of British Columbia’s (UBC) Sea Around Us initiative showed that new technology has allowed commercial fishing fleets to double their fishing capacity every 35 years, which in turn increases the pressure on dwindling fish stocks.

The researchers examined more than 50 studies related to an increase in catching power, and concluded that the introduction of, for example, GPS, fish finders, echo-sounders, and acoustic cameras has led to an average 2 percent yearly increase in vessels’ capacity to capture fish.

Read the full story at Seafood Source