わが国における食肉生産を目的としたイノシシ飼育の展開に関する予察的研究

抄録

In recent years, wild boar farms have appeared in various areas in order to produce their flesh. Although wild boars have been treated mainly as vermin or game, such new domestication is also considered to be one of the biogeographical themes.
The author made a preliminary study of these phenomena in Japan through questionnairing. New domestication of wild boars is divided into two forms such as raising of wild boars and raising of ino-buta (hybrid between wild boar and pig). The former has developed since around 1975 when hunting number of wild boars began to decrease in spite of increasing demand for their flesh. The latter has been introduced to improve fleshy substance in pig since around 1970 and to solve problematic factors on number of litter and fattening term in raising of wild boars.
With regard to operation, there are three types such as individual operation, group operation and entrusting. Less than 50 head of wild boars are raised in individual operation, but there are some large scale raising in group operation and entrusting. Especially, entrusting is thought to be one of the effective systems that make security of labor and land for enlarging a scale. Generally, operators give assorted feed for pig keeping to wild boars from the view point of facility and reduction of labor. In raising of wild boars, potatoes, cereals, edible herbs, grass, nut, and bone and scraps of fish and chicken are often supplied in order to improve the quality of flesh. Excrementitious matter is utilized as manure almost all.
The distribution of wild boars is as follows. There are two courses in the trade of wild boars. One is the trade of little wild boars to those who wish to keep them or want to keep more wild boars. The other is the trade of fattened one as flesh or mating. Main destinations of flesh are restaurants, hotels, and wholesale stores of flesh of wild boars. In the trade of ino-beta, fattened one is shipped for flesh, and little one is scarcely dealt with.
Although new domestication of wild boars for flesh is an interesting attempt, there are some problems to be solved such as insufficiency of labor and land for enlarging a scale, techniques of raising, unbalanced connection between producer and consumer, and fluctuations of market prices.