According to a reporter in Pretoria, a study on two closely related primate species living in the Soutpansberg Mountains in Limpopo Province, South Africa, reveals that smaller animals may face greater challenges as the climate continues to change.
Thick-tailed Bushbaby (Otolemur crassicaudatus). (Photo: University of Colorado Boulder)
The study published in the International Journal of Primatology focused on two primate species: Thick-tailed Bushbaby (Otolemur crassicaudatus) and Southern Bushbaby (Galago moholi). The Thick-tailed Bushbaby is roughly the size of a large cat, while the Southern Bushbaby, with its large ears and eyes, is small enough to fit in the palm of a human hand. The research, led by primatologist Michelle Sauther from the University of Colorado Boulder (USA) in collaboration with colleagues from the University of Pretoria, the University of Venda (South Africa), and the University of Burgundy (France), aimed to explore an overlooked question in conservation: does size affect how a species adapts to extreme temperatures?
Results indicated that the Thick-tailed Bushbaby tends to be alert and active during milder weather, rarely venturing out when temperatures exceed 24 degrees Celsius. In contrast, the Southern Bushbaby must remain active regardless of hot or cold weather conditions.
Researcher Sauther explains that the Southern Bushbaby weighs only about 150 grams and has a rapid metabolic rate, meaning it needs to eat constantly. Conversely, the Thick-tailed Bushbaby can store more fat in its body, allowing it to rest during extreme temperature conditions.
However, Sauther noted that both of these primate species may struggle to adapt as temperatures continue to rise. She also mentioned that while neither species is currently recognized as endangered, they face increasing pressures from various factors, including the expansion of road networks across South Africa and the trade of exotic pets.
Sauther hopes that this discovery will inspire more research on smaller primate species and emphasizes that this study serves as a reminder that small animals also need protection.
