Marine protected areas provide refugia for wildlife from fishing pressure, allowing recovery of depleted populations and improving welfare for individual animals through reduced anthropogenic stressors.
Marine protected areas provide welfare benefits to individual animals by reducing the chronic stressors that fishing and marine traffic impose. Fish in heavily fished areas experience continuous anthropogenic stress - boat noise, gear encounters, and population density disruption from removals. MPAs allow recovery of population densities that restore natural behavioral dynamics including shoaling, predator-prey interactions, and reproduction. Cetaceans in designated quiet areas with restricted vessel traffic show behavioral normalization including more time at the surface and less evasive behavior. The welfare benefit of MPAs is therefore not just about population numbers but about the quality of individual animal lives within boundaries where anthropogenic stressors are reduced.