title: [Populations of harmful rodents on commercial swine-breeding farms and their effect on the technology of swine feeding].
abstract: The effect was studied of the swine-feeding technology in five industrial complexes on the population density of the harmful rodents in them. This made it necessary to estimate the population density of the rodents in each productional section of the swine-breeding complexes, and to work out their technologic characteristic on the nutrition principle. It was established that the population density of rodents correlated positively with their access to feeds. In sections where rated, mechanical, and protected feeding was prectised the number of rodents were considerably lower than in sections with unrated feeding of pigs. It is believed that the rat invasion of the buildings in the industrial swine-breeding complexes is a factor that contributes to the rise of populations of harmful rodents, while the vast access to feeds is of greater importance chiefly for their further development.
mesh_terms: D000821:Animal Feed; D000822:Animal Husbandry / Q000379:methods*; D000818:Animals; D002031:Bulgaria; D011156:Population Density; D012375:Rodent Control; D012377:Rodentia; D013552:Swine / Q000502:physiology*
vernacular_title: Vŭrkhu plŭtnostta na vrednite grizachi v promishlenite svinekompleksi i vliianieto i ot tekhnologiiata na khranene na svinete.