RESUMO
Royal antelope (Neotragus pygmaeus) are among the smallest ungulate species and are browsing ruminants. To date, their capacities for fiber fermentation and nutrient digestion have not been quantified. This study compared apparent digestibilities of a typical high-fiber herbivore pellet (ADF 25) and a low-starch, high-fiber diet (WHP) in royal antelope in a crossover design (seven subjects in the first period and four in the second). Animals on ADF 25 pellets had greater intake concentrations (P < 0.05) of dry matter, crude protein, lignin, and crude fat; however, animals fed the WHP diets had greater (P < 0.05) apparent digestibility of dry matter, acid detergent fiber, neutral detergent fiber, and crude fat. Identifying the capacity to which these smaller ruminants can degrade fiber will help to establish more appropriate feeding guidelines for small, browsing ruminants in captivity.
Assuntos
Ração Animal/análise , Antílopes/fisiologia , Dieta/veterinária , Fibras na Dieta/metabolismo , Digestão/fisiologia , Fenômenos Fisiológicos da Nutrição Animal , AnimaisRESUMO
Mammals are metagenomic in that they are composed of not only their own gene complements but also those of all of their associated microbes. To understand the coevolution of the mammals and their indigenous microbial communities, we conducted a network-based analysis of bacterial 16S ribosomal RNA gene sequences from the fecal microbiota of humans and 59 other mammalian species living in two zoos and in the wild. The results indicate that host diet and phylogeny both influence bacterial diversity, which increases from carnivory to omnivory to herbivory; that bacterial communities codiversified with their hosts; and that the gut microbiota of humans living a modern life-style is typical of omnivorous primates.
