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用有色饲料养贝类,能观察到贝类摄食、消化和排泄的情况。可用于饲养的带有颜色的饲料,有黑色的炭粉,白色的淀粉,绿色的单胞藻液,及红色的染料,等等。例如,在水池、水族箱或水缸里放养了牡蛎、贻贝或珍珠贝等,投给这些饲料的实验,能观察到下列结果: 1,摄食—排泄的时间。当贝体开壳滤水状态,从投饲料后看到饲料进入外套腔被摄食,待见到粪便从肛门排出时止,可即做出记录,为摄食至排泄的时间。
With colored feed raised shellfish, shellfish can be observed feeding, digestion and excretion of the situation. Can be used for feeding the color of the feed, there are black carbon powder, white starch, green monocytic liquid, and red dye, and so on. For example, oysters, mussels, or pearl oysters were stocked in ponds, aquariums or tanks, and the following experiments were conducted on these feeds: 1. Time spent on feeding - excretion. When the shell body open shell drainage state, after feeding the feed to see the feed into the jacket cavity is feeding, to be seen when the excrement from the anus only, can make a record for the time of feeding to excretion.