Common and pygmy marmosets face mounting welfare challenges as forest fragmentation isolates groups and reduces food availability across South America.
Marmosets in fragmented landscapes experience chronic nutritional stress as gum-producing trees become scarce. Group cohesion may break down under resource pressure, disrupting the cooperative infant-carrying and food-sharing behaviors essential to survival. Road networks bisecting habitat create novel mortality risks. Conservation efforts that maintain forest corridors between fragments substantially improve welfare outcomes for resident groups.