The metacercarial cysts percentage of the gill filaments increased from 0 to 00% with the growth of the host, but those 随着鳙的生长 ,鳃丝囊蚴所占的比例逐渐增大 ,从 0增加到 0 0 % ,而鳃耙囊蚴所占的比例逐渐减小 ,从 0 0 %下降到 0。