Aquaculture

Welfare of Commercially Farmed Cockles and Whelks

Cockles and whelks are harvested in large numbers from wild beds and increasingly farmed; their welfare as marine molluscs deserves proportionate scientific consideration.

Key Facts

Cockle harvesting from wild beds involves mechanical disturbance of the substrate
Whelks are predatory molluscs with more complex behavior than bivalves
Common dredging methods cause high bycatch and habitat damage
Whelk nervous systems are more developed than many bivalves
Both species respond behaviorally to harmful stimuli suggesting some nociception

Welfare Considerations

Cockle and whelk welfare is more uncertain than strictly sessile bivalves like oysters, given their greater behavioral complexity. Precautionary handling improvements and dredging method refinements are low-cost welfare measures in the face of this uncertainty.

What You Can Do

Support research into whelk and cockle welfare and sentience
Advocate for sustainable and lower-disturbance harvesting methods
Choose cockles and whelks from well-managed rather than destructively dredged beds
Apply proportionate precautionary consideration to these molluscs given welfare uncertainty