关键词: 高原鼢鼠, 侵占行为, 模拟洞道, 投饵机

Abstract: It is generally found during the field on-the-spot work that new soi1 cork of mound would appear at the exposed hole which had been placed with traps within several hours or several days after a zokor was caught in a bulrow system ,and another in dividual might be caught if replacing the traps．This phenomenon seemed to indicate that zokors tended to invade the vacant territory of the habitat．
The author studied the invadig behavior of the zokor which was in the specific pairing observing cases．Experiments were made for six times totally．The invading behavinrs occured by another zokor in the nearby case within two and a half hours after removing the zokor in one case，and four times，they occupied the vacant burrow -system of the oppcsite side to take the stored food to its own burrow- system, but still live in the original nest．The occupied the others' bur row -system twice and moved into the 'new 'nest whieh had been the habitat of another zokor ．
The discovrcry of the invading behavior was pointed out that under natural condition，the vacant territory in the habitat could be occupied by the zokons neartby or the
immlgrating zokors within a short period when zokors had naturally died，eaten by natural enimies or killed in the process of controlling in a burrow system．Thus it is possible to be mbine this special behavior of the zokor with the present rodent control methods and knowledge so as to further raise the efficiency and effect in the work of the zokor control.
Prom 1986 to 1987，a simulatlng burrow -system shooting bait drawing machine which had experimented on-the-spot for controlling the rodents was jointly manufactu-
red by us and Qinghai Machinery Research institute. Towed by a 55 h．P．tractor，the machine opened 1 the burrow channels consecutively 15- 20cm undergcound and shot 19g of wheat poison bait by 5.5m intervals. It is shown by observations that the zoko-rs used simulating burrow system in sections，and the longest section could reach 32m ，while the shortest one was only 0.3m. M eanwhile，most of the sections that had been used were incorporated into the invadin g zokor 's burrow system. The result of control-ling the zokor was 85.1% by using the machine to shoot 0.075 Sodium-D iphaclnone of poison grain bait,and the continued killing efficiency could reach 97.7 % 5 months later． The result fully showed that by usin g the simulating burrow -system shooting bait drawing machine to control the zokor, the poison bait that left over in the burrow system could continuously develop the killin g effcieney of the relic and new ly immig-rating zokors within several months and with a single balting if also could intensify and consolidate the controlling effect．In the exemplin g area，the phenomenon of invading the slmulating burrow system arld taking the poison bait by the plateau pika exists commonly．So two kinds of rodents could be controlled at the same time with the method explained in the Paper.

Key words: Plateau zokor, Myospalax baileyi, Invading behavior, Simulating burrow-system, Shootingbait machine