Effect Of Different Feeding Strategies On The Growth And Digestion Of Exopalaemon Carinicauda

Feeding strategies include feeding frequency,feeding method,feeding time and feeding level.Different feeding strategies have a significant impact on the growth performance of aquatic animals.Scientific and reasonable feeding strategies can promote the digestive ability of aquatic animals and improve the growth performance.In this paper,the optimal feeding strategy was studied for feeding frequency(A: 1/d,B:2/d;C:3/d;D:5/d)and hunger duration(J0 group was continuously fed;J2 group was starved for 2 days and fed again for 14 days;J3 group was starved for 4 days and fed again for 14 days;J6 group was starved for 6 days and fed again for14 days).The experimental results are as follows:(1)Effect of different feeding frequency on the growth performance,body composition and digestive enzyme activity of tail E.carinicauda;At 30 d,the specific growth rate of CSD decreased at 60 d,the feeding frequency on the liver ratio was 1.0;at 30 d,group A was significantly lower than other groups at 1-30 d,and significantly lower in Group E at 60 d;When the feeding frequency varies greatly(Group A,C and E),water content is significantly different,water content is lowest;crude protein content in group C increased significantly compared with groups B,D and E;crude fat content increases with feeding frequency,groups A,B and C,and ash content in Group A to C;Lipase activity increased significantly from group A to group C,then stabilized,group A was significantly lower compared with group C and group E,amylase activity decreased first before increase,group E increased significantly and reached the highest,while in the first four groups,amylase activity decreased;trypsin activity increased first and decreased,group C highest group A was the lowest.(2)Effects of different starvation duration on the survival rate,growth performance,body composition,digestive enzymes and intestinal structure of E.carinicauda.With starvation length,intestinal mucosal thickness decreased with no significant difference in J0 group and J2 group,J4 group and J6 group;myometrial thickness increased in J4 group and significantly decreased in J6 group.