Selective breeding programmes for farmed shrimp have dramatically improved growth rates and disease resistance, but some genetic changes may create new welfare challenges.
Shrimp genetics and welfare intersect in complex ways. Selective breeding for growth and disease resistance can improve welfare by reducing disease mortality and time spent in production conditions. But fast-growing lines may show increased physiological stress responses, and broodstock management — particularly eyestalk ablation to induce spawning — is a major welfare concern for animals that may have nociceptive capacity. The precautionary principle suggests that reducing painful procedures in shrimp breeding should be a priority even where sentience remains scientifically uncertain. Welfare-conscious aquaculture genetics requires monitoring beyond productivity traits to include stress and behavioural indicators.