Aquaculture Climate Change Jun 2026

Climate change and reproductive biocomplexity in fishes: Management approaches for fisheries and aquaculture * Climate and tempera... Global Seafood Alliance Impacts of Climate Change on Fisheries and Aquaculture This report provides the most up-to-date information on the disaggregated impacts of climate change for marine and inland fisherie... Our Shared Seas Climate change implications for fisheries and aquaculture - FAO.org Pêche et aquaculture ... It contains three technical papers that were presented and discussed during the Expert Workshop on “Clima... Food and Agriculture Organization Impacts on climate change on fisheries and aquaculture Interactions of climate change with poverty are described, as well as institutional opportunities that could help reduce food inse... Food and Agriculture Organization Impact of climate change and adaptation strategy in aquaculture The findings indicate that aquaculture is primarily impacted negatively by climate change, with the negative consequences surpassi... Københavns Universitets Forskningsportal (PDF) Positive impacts of climate change on fisheries and aquaculture Jan 27, 2025 —

"You want to isolate the broodstock?" Sarah asked. "Those tanks are for the hatchery, not the grow-out."

Tropical species fare little better. Nile tilapia, the world’s most widely farmed finfish, shows optimal growth at 28-30°C. Above 32°C, feed conversion ratios plummet; at 36°C, mortality approaches 50%. With equatorial regions projected to experience an additional 2-3°C warming by 2050, tilapia farming in countries like Bangladesh, Egypt, and Indonesia will become thermally marginal or impossible. aquaculture climate change

Yet just as this "Blue Revolution" accelerates to meet demand, it collides with an existential threat: climate change. The very environments where aquaculture operates—estuaries, deltas, and coastal zones—are planetary hot spots for climate volatility. Rising temperatures, ocean acidification, sea-level rise, and intensifying storms are not distant projections but present-day realities for fish farmers from the Mekong Delta to the Gulf of Maine. This article explores the complex, often paradoxical relationship between aquaculture and climate change, examining how a warming world threatens farmed seafood while asking whether aquaculture can simultaneously adapt and help mitigate the crisis it faces.

Mollusks construct their calcium carbonate shells through biomineralization, a process profoundly hindered by lower pH and reduced carbonate ion availability. The Pacific Northwest oyster industry—worth $270 million annually—collapsed in 2007-2009 when larval mortality at the Whiskey Creek Hatchery reached 80%. The culprit: corrosive waters upwelled from the deep Pacific, undersaturated in aragonite, the specific form of calcium carbonate oysters require. Hatcheries now buffer incoming seawater with sodium carbonate, an expensive stopgap that treats symptoms, not causes. It contains three technical papers that were presented

To survive a changing climate, the aquaculture industry must embrace innovation. This includes the development of Recirculating Aquaculture Systems (RAS), which move fish production into land-based tanks where the environment can be perfectly controlled, shielded from the vagaries of the weather.

The primary scientific resources on aquaculture and climate change focus on identifying risks like rising temperatures and ocean acidification, while also highlighting adaptation strategies for global food security. Key Scientific Papers & Reports The FAO Technical Paper No. 627 Adaptation & Resilience Strategies

Beyond heat, the ocean is undergoing a fundamental chemical shift known as ocean acidification. As seawater absorbs carbon dioxide, its pH drops. This poses an existential threat to shellfish farming. Oysters, mussels, and scallops struggle to build their calcium carbonate shells in acidic water, often leading to massive die-offs in the larval stages. For coastal communities that rely on bivalve farming, this change is not a future threat but a current economic crisis. Extreme Weather and Coastal Vulnerability

Perhaps most alarming are the emerging viral diseases. Tilapia Lake Virus (TiLV), first identified in 2014, has now spread to five continents, with mortality rates exceeding 90% in some outbreaks. Climate models project that suitable temperature ranges for TiLV (22-32°C) will expand by 40% by 2050, exposing 70% of global tilapia farms. Farmers respond with antibiotics—75% of which pass through fish into surrounding waters, selecting for resistant bacteria that then infect wild populations and humans.

Selective breeding and genetic modification offer pathways to thermal tolerance. The University of Stirling’s Aquaculture Genetics Group has produced tilapia strains that maintain feed conversion at 34°C, a 2°C improvement over wild-type. Norwegian salmon breeders have selected for heat shock protein expression, reducing mortality during marine heatwaves by 30% over five generations.

Sea-level rise and extreme storms (hurricanes, typhoons) can physically destroy cages and ponds, leading to massive stock loss and increased management costs. Adaptation & Resilience Strategies