附着型纤毛虫的密度占纤毛虫总密度的42.7%，匍匐型纤毛虫的密度占纤毛虫总密度的31.7%，肉食型纤毛虫的密度占纤毛虫总密度的21.2%，自由游泳型纤毛虫的密度占纤毛虫总密度的4.4%。

The density of attached ciliates accounted for 42.7% of the total ciliates density, while crawling ciliates for 31.7%, carnivorous ciliates for 21.2% and free-swimming ciliates for 4.4%.

youdao