Abalone Welfare in Intensive Tank Aquaculture Systems

Abalone farming has expanded globally as wild stocks have collapsed, but the welfare needs of these marine gastropods in captive systems are poorly understood.

Key Facts

Abalone are herbivorous gastropods that graze on macroalgae in subtidal rocky reef environments
Commercial farming uses stacked tank systems with artificial diets or cultured macroalgae at densities far exceeding natural levels
Abalone show avoidance, wound-guarding and nociceptive responses, suggesting capacity for welfare-relevant negative states
Water quality — especially oxygen, pH and temperature — is critical to abalone welfare in intensive culture

Welfare Considerations

The welfare science of abalone is at an early stage, but their demonstrated responses to noxious stimuli and complex reef ecology suggest that intensive farming environments create welfare problems we have not yet characterised. Overcrowding, dietary inadequacy, poor water quality and inability to exhibit natural grazing behaviour are all candidate welfare concerns. Development of validated welfare indicators specific to abalone is a research priority for the growing global industry.

What You Can Do

Support research into abalone welfare indicators and stress physiology
Maintain optimal water quality parameters — oxygen above 6 mg/L, temperature within species-specific range
Provide macroalgal or high-quality formulated diets appropriate to species
Reduce stocking densities to allow natural movement and substrate contact