高原鼢鼠挖掘活动的观察

本文通过自制高原鼢鼠挖掘行为观察箱，以直接观察法和摄录像系统观察了在模拟不同土壤坚实度条件下，高原鼢鼠的挖掘行为、掘土速度、掘土持续时间以及在每一掘土回合内的掘土量。结果表明，高原鼢鼠的掘洞活动主要由掘土、扒土、踢土、推土、以及拱土组成；掘土速度和掘土持续时间与土壤坚实度有关；在相同土壤条件下，虽然雄、雌鼢鼠的掘土速度相似，但雄性鼢鼠在每回合内的掘土量明显地高与雌鼠。

THEOBSERVATION ON BURROWING BEHAVIOR OF PLATEAU ZOKOR(MYOSPALAX BAILEYI)

Burrowing behavior,digging speed,digging duration,and excavated soil quantityduring a digging duration bout of plateau zokor in narrow glass-sided tank(120cm long,120cm high and 10cm wide)were studied by observation and vidieo camera system atHaibei Research Station of Alpine Meadow Ecosystem,Academia Sinica,1991.The speedand duration of digging by both sexual groups were compared in different simulated soilfirmnesses.The result showed that the main behavior of burrowing were consisted of digging,scratching,kicking lossed soil behind,push lossed soil forward,arching to soil,repairingburrow and dealing with plant roots. The digging speed and duration were significantlyinfluenced by soil firmness.With the increasing of soil firmness,the digging speed wasdecreasing,but the digging duration was increasing.As a result,the soil quantity/boutexcavated by zokor was not accordingly changed with soil firmness,however,it was sig-nificantly different between males(75.07 grams soil dried weight)and females(51.39grams).