As elephant populations grow in protected areas and conflict with adjacent human communities increases, wildlife managers face difficult decisions about population control. Immunocontraception offers a welfare-centred alternative to culling, with important welfare implications of its own.
Elephant population management in enclosed reserves involves choosing between different welfare harms rather than between harmful and harmless options. Culling eliminates population pressure but causes acute trauma and death. Immunocontraception avoids lethal harms but involves repeated capture events and the welfare implications of extended oestrus. Doing nothing risks overgrazing, starvation from habitat degradation, and increased human-elephant conflict with its associated harms to both species. The welfare calculus favours immunocontraception over culling in most contexts where the logistical requirements can be met — the temporary stress of annual darting is preferable to the irreversible harm of killing. But the choice also depends on scale: immunocontraception is feasible for small to medium populations in accessible reserves, but becomes logistically challenging at Kruger-scale populations. Whatever management approach is taken, the welfare of individual elephants — including the social disruption caused by any population management intervention — should be explicitly considered alongside ecological objectives.