【摘要】 利用１４Ｃ方法分别测定了５‰，１０‰，２０‰，３０‰和４０‰盐度下不同体长蒙古裸腹氵蚤的滤水率、摄食率和日粮。结果表明：同体长下，在５‰～４０‰范围内盐度对氵蚤摄食无显著影响，但该氵蚤的滤水率、摄食率和日粮均在１０‰下略高，５‰下较低；各盐度下体长对氵蚤的滤水率、摄食率和日粮都有显著影响，体长增加，氵蚤的滤水率和摄食率升高，而日粮降低，氵蚤体长与滤水率呈显著相关；在５‰～４０‰盐度下，幼氵蚤的日粮为７０．７６％～８４．０２％，成氵蚤为７０．７３％～８０．６０％。根据试验１０‰～２０‰应为蒙古裸腹氵蚤摄食的最适盐度区更多还原

【Abstract】 The filtering rates of various size of Moina mongolica Daddy, a saline species of cladoceran, were measured at different salinity ranged from 5‰￣40‰ with 14 C method, then the feeding rates and the daily forages were further calculated out, respectively. The result showed salinity had no significant effect on feeding intensity of M. mongolica Daddy, although all data obtained in the experiment indicated that the filtering rates, feeding rates, and daily forages were hightest at 10‰, and lowest at 5‰, and body length, which closely positively correlated with the filtering rate was one of important factors regulating feeding intensity of this flea, and the daily forages fluctuated between 70.76%￣84.02% in juvenile stage, and 69.40%￣80.60% in adult stage, respectively. From above, we deduced that 10‰ may be suitful salinity to feeding activity of M. mongolica Daddy.更多还原