Harbour seal pups are born able to swim but depend on their mothers for nutrition, and their welfare is vulnerable to disturbance at pupping sites.
Harbour seal pups separated from their mothers by disturbance before weaning is complete face starvation and death. Summer disturbance at pupping sites - from boats, kayaks, and pedestrians - causes welfare harm disproportionate to the small number of people involved. Exclusion zones during pupping season directly protect pup welfare.