Aquaculture and Fish Welfare

Farmed Prawn Welfare: Stocking Density and Aggression

Farmed prawns kept at high stocking density exhibit increased aggression, injury from conspecifics, and stress responses. Density management is a primary welfare intervention.

Key Facts

Prawns are territorial and exhibit dominance-related aggression at high densities
Injury from antenna and limb loss increases significantly with overcrowding
Moulting prawns are especially vulnerable to attack from conspecifics
Provision of shelter structures reduces aggression in intensive prawn systems
Optimal stocking density varies by species, temperature and system management

Welfare Considerations

Stocking density management in prawn aquaculture is a primary welfare intervention. Recognition of prawn sentience and capacity to suffer is driving the development of species-appropriate standards.

What You Can Do

Support aquaculture certification schemes that include crustacean stocking density standards
Advocate for prawn welfare research to be integrated into aquaculture development programmes
Choose prawns from certified welfare-positive producers where available