试论蛙类生活习性的多样性

从捕食、冬眠、繁殖等方面探讨蛙类生活习性的多样性．蛙类幼体(蝌蚪)的食性有杂食性、植食性和肉食性3种类型，成体主要以活动的动物为主食．各种蛙冬眠期的长短和起止时间不相同，同一种蛙，开始冬眠和苏醒的迟早，也因地区而异．1只性成熟的雌蛙一年可产卵2次或2次以上；各种蛙类每1雌体的1次产卵数量悬殊很大；大多数蛙类的产卵期为每年的4～8月间，但一年四季都有蛙类产卵；蛙类的产卵场所可分为水内产卵和水外产卵2大类；蛙类产卵的全过程包括呜叫求偶、抱对、产卵动作等．

On the Varieties of the life habits of the frogs

The varieties of the life habits of the frogs are being discussed in this paper as seen from the different aspects such as: preying, hibernation, and breeding etc. The young frogs ( tadpole) have the following three types of feeding habits: the omnivorous feeding habits; the plant feeding habits and the carnivorous feeding habits. But the adult frogs mainly feed on the living animals. The length of hibernation varies from one kind of frogs to another, so does the beginning and stopping time. Even frogs of the same kind may hibernate and wake at an earlier or later time at different areas. A mature female frog spawns twice or more a year. The quantity of the spawn varies greatly among each female frog of different kinds. The spawning period is between April and August, however, frogs may spawn throughout the year. The places for spawning can be divided into the following two major kinds: in the water and out of the water. The course of spawning includes courting, hugging and spawning, etc.