Study Reveals Lower Bone Density in Zoo-Held Big Cats Compared to Wild Counterparts

An international research team, including scientists from Marshall University, the Australian Museum, the National Museum of Natural History, and Johns Hopkins University, published a study in Royal Society Open Science. The investigation compared bone density in captive and wild big cats such as mountain lions, cheetahs, leopards, and jaguars, using specimens from the Smithsonian Institution in Washington, D.C., and the American Museum of Natural History in New York. Findings indicated that zoo animals have significantly reduced bone density, likely due to restricted physical activity. This research advises caution in using zoo specimens for comparative studies and highlights implications for rewilding programs, as morphological changes could impact the survival of reintroduced endangered species.