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梭鱼幼鱼食物通过消化道的时间
杨纪明¹
中国科学院海洋研究所

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THE PASSAGE OF FOOD THROUGH THE ALLMENTARY CANAL OF YOUNG MULLET Mugil so-iuy Basilewsky

Abstract:

This observation was carried out both under natural condition and in the laboratory during the summer days in 1956 in Yantai with the following results and conclusions. Young mullet (2.1-2.7 cm body length), being a plankton feeder, feed mainly on Paracalanus parvus and Cypris larvae, but other copepods, cladocera, crustacean larvae, lamelibranchia larvae and eggs of Engraulis japonica are also preyed on. They are greedy at evenings, the mean weight of their stomach contents is 0.032 gram, accounting for 8.8 percent of their body weight. The food passes into intestines from stomachs and most of them being excreted gradually out of the anuses within 12 hours i. e. the next morning. Two more hours later the remainings in the intestines are excreted thoroughly off the body.

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