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Few studies are available on the population dynamics of medium and large mammals in gallery forests of the Sudan and Sahel regions of West Africa. Line-transect studies of the abundance (estimated by KIA) of nine species of ungulates and three species of primates were carried out between 2004 and 2013 in the Comoé-Leraba protected area of Burkina Faso, West Africa. No peer-reviewed study of population sizes of mammals in this protected area has been published, making the data presented of special relevance. Population size trends varied significantly across years in both primates and ungulates, with some species (Papio anubis, Phacochoerus africanus, Alcelaphus busephalus and Tragelaphus scriptus) decreasing consistently. Significant relationships were observed between poaching intensity and population oscillations in Erythrocebus patas, Kobus ellipsiprymnus, Kobus kob, Ourebia ourebi and Cephalophus rufilatus.

The article presents a study which aims to show the carrying capacity in the Biosphere Reserve of Mare aux Hippopotames in Burkina Faso which holds one of the major hippopotamus populations in the country. The study investigated the availability of forage and the feeding habits of the hippopotamus. The biomass was estimated and was used to assess the carrying capacity of the area for hippopotamus. The results showed that the available biomass in the area will only sustain a hippopotamus population of 128 individuals, and other factors will also explain the low level of hippopotamus population in the area.