Abalone Welfare in South African Aquaculture

Perlemoen abalone (Haliotis midae) aquaculture in South Africa has expanded rapidly as wild populations collapsed from poaching. Farm-raised abalone face welfare challenges including crowding, hypoxia, and disease, while wild populations face the welfare crisis of poaching-driven decimation.

Key Facts

Wild South African abalone populations have declined by over 96% from historical levels due to poaching
South Africa now farms approximately 1,500 tonnes of abalone annually, primarily for Asian export markets
Abalone aquaculture operates in land-based flow-through systems with careful temperature and oxygen management
Withering syndrome, caused by a Rickettsiales bacterium, decimates populations in warm water stress events
Abalone show measurable stress responses to handling, heat, and oxygen depletion

Welfare Considerations

Abalone welfare science is developing: research confirms they have nociceptors and produce opioid-like compounds when injured, suggesting pain capability. In aquaculture, high stocking densities cause oxygen depletion and competition for kelp, leading to growth suppression and chronic physiological stress. Heat stress from climate warming is an emerging threat to both farmed and wild populations, causing mass die-offs. Wild abalone poached from reefs face traumatic separation and death, with populations so depleted that their social and ecological roles are lost. Welfare improvements in farming focus on density management, water quality optimisation, and disease surveillance.

What You Can Do

Support anti-poaching programs protecting remaining wild abalone populations in the Western Cape
Choose only certified legally-farmed abalone from accredited South African producers
Donate to DAFF South Africa's abalone stock recovery and anti-poaching efforts
Support research into heat-tolerant abalone strains for climate adaptation
Raise awareness that purchasing wild-caught South African abalone likely supports illegal poaching